Astral

[gritty shore]

And is actually pretty

[grand shadow]

interestingly it also skipped fd 4?

this might be some refcounting issue but where the refcounting is bad I have no idea

since on refcount = 0 the vnode gets set to null

flags too

[carmine swallow]

it's kinda weird that the close of an unrelated fd affects it at all

or well not unrelated given that its the dirfd passed to openat but at that point it shouldn't depend on it in any way

[grand shadow]

yeah looking at the code theres nothing that immediatelly comes to my attention

[grand shadow]

wtf why is it not using fd 4

[carmine swallow]

and the same slab is allocated for both the dirfd and the new file opened from it

[grand shadow]

oh wtf

thats

and its not coming from cleanfile

slab bug???

but I dont run into that which is so weird

can u print the slab allocations and frees

like in slab.c

[carmine swallow]

that's probably going to be a ton of logs, will have to print to e9

its freed twice at some point

[grand shadow]

bruh wtf why is it not assert failing

oh I think I might have put that behind an ifdef

[carmine swallow]

turns out that its a bug in dirfd_enter

static inline int dirfd_enter(char *path, int dirfd, file_t **file, vnode_t **dirnode) {
    if (*path == '/') {
        *dirnode = proc_get_root();
    } else if (dirfd == AT_FDCWD) {
        *dirnode = proc_get_cwd();
    } else {
        *file = fd_get(dirfd);
        if (file == NULL) {
            return EBADF;
        }

        *dirnode = (*file)->vnode;

        if ((*dirnode)->type != V_TYPE_DIR) {
            //fd_release(*file);
            return ENOTDIR;
        }
    }
    return 0;
}
``` that commented out line, at least as far as I can tell the usual functions that use dirfd_enter unconditionally call dirfd_leave if a node was returned even in the case of an error which does `fd_release(file)` so if its already released by dirfd_enter it does a release twice

[obsidian pivot]

btw i wrote this script (in c++) that parses logs similar to those allocation logs to check for discrepancies

might be helpful, just ping me I'll send source code

[scenic epoch]

sorry that im not participating in the tech jargon here but does astral have loop devices

[robust geyser]

no

[robust geyser]

@grand shadow sorry for ping but if you have 2 minutes of free time could you check if commenting out the lines in ps2mouse.c which construct and queue a mouse packet reproduce the issue from yesterday for you? i kinda narrowed the crash down to that lol

[grand shadow]

Wtf crazy that this hasnt caused issues so far

[grand shadow]

I can do that in a bit

[prime juniper]

And that’s planned. Your point?

[robust geyser]

running a chromium binary linked against glibc?

[prime juniper]

Oh no

Native port

But maybe one day

Missed the glibc part lmao

[opal lotus]

yeah no our point was a glibc chromium

[robust geyser]

cuz steam linux client

[prime juniper]

Yeah that’s a yikes

[grand shadow]

Glibc shm?

Shim

@robust geyser quick question, did you remove the datac = 0

[robust geyser]

💀

yeah that would explain a lot

thanks

LMAO

[grand shadow]

https://tenor.com/view/skeleton-gif-26826812

[robust geyser]

Me when im retarded

[opal lotus]

this guy

[grand shadow]

I mean, how its grouped in the code probably does not help mich

[robust geyser]

noooo it does not lol

but it's all good, that was a good find

im just blind it is what it is🥀

[marsh sparrow]

chromium with binary compat is kinda lame

since you can just as well do it w/o

[scenic epoch]

[grand shadow]

loop devices as in disk or network?

there is a network loopback

but no disk loopback

[blazing atlas]

why would you need a disk loopback

[grand shadow]

mounting partitions out of a image

[blazing atlas]

actually i forgot i did use them and they are pretty usefull lmao

completely forgot

[robust geyser]

loop devices made me think about disk, not network

probably my skill issue

[scenic epoch]

mount disk image i meant

[robust geyser]

no

[carmine swallow]

at least I now know that xorg works on this libc now idk what should I try to get running, ig I could try factorio (though it probably has the weird thing that's there on linux too on this libc where the save files are incompatible with the normal glibc version for some reason)

also unrelated to this it'd be nice to have a script to update the disk image instead of recreating it every time, ig I might make one

[grand shadow]

I never made one because I'm p sure that would need like root for mounting and that'd be kind of annoying

but if you figure something out I will merge it

[grand shadow]

also WTF how did you get the sidebar

[robust geyser]

yes it does need root for mouting the image, but honestly it's worth it

[grand shadow]

that does not work normally

[carmine swallow]

idk it just worked lol

[grand shadow]

💀

guess its a linux sysdep unimplemented thing

I should look into it

having the sidebar would be epic

[carmine swallow]

tbh I didn't even know there should be a side bar normally, I just assumed it was an update or smth

[grand shadow]

fvwm has a side bar normally it just doesnt work on astral

you know those two windows that appear on boot?

thats supposed to be the side bar

I think it might be an unimplemented epoll causing issues

[carmine swallow]

how would it be any different on a different libc if that would be the case though?

[grand shadow]

do you expose epoll?

[carmine swallow]

yes but all the epoll functions just return enosys

[grand shadow]

oh wtf then

guess thats a mlibc bug

[carmine swallow]

I guess printf debugging the sidebar might help

[grand shadow]

@prime juniper when you eventually do mlibc-linux, can you build fvwm3 as well?

[prime juniper]

Sure

I’ve confirmed the weekend to be available

So pending weather and the EOY post we can ball

[grand shadow]

helll yeah

[carmine swallow]

I think it might actually just work (granted it takes like a ton of time to load, ig it might be better if the graphics would be forced to very low)

plus it needs /proc/self/exe symlink, I just created that manually

[grand shadow]

wtf real

factorio on astral

I guess I already fixed that weird bug that you hit on your mlibc shim attempt?

[carmine swallow]

possibly, idr what that bug was about anymore

[grand shadow]

iirc it was a page fault

what was the xorg corruption btw

or was it just the file stuff

also even on windows space age takes an eternity to load for me I cant imagine it on astral 💀

[carmine swallow]

the xorg stuff was at least partly a skill issue on my part as I forgot to install the xf86 drivers

[grand shadow]

oh lmao

[carmine swallow]

bruh

it does let me load to an existing save tho

[grand shadow]

💀

insane that it even loaded with space age

how is perf btw

[robust geyser]

2026 year of astral desktop

???

[carmine swallow]

5fps 💀

ig this might possibly be somewhat improved by building the libc in release mode (though the allocator there isn't the best in general, its not the worst but its not the best either)

[grand shadow]

• bad smp perf cuz of shootdowns etc

insane that it works tho

gaming is real

[carmine swallow]

also factorio is only using 1 render thread due to sched_getaffinity not being implemented

[grand shadow]

oh right that could be an issue

[carmine swallow]

idk how much it affects the perf

I guess it might be a decent boost especially if qemu is given more actual cores

[grand shadow]

likely

although with the current vmm page fault code it might not be that big of an improvement

since paging in a writeable page means a shootdown

I need to add a fast path for that case

that doesn't involve 2 faults

[willow rapids]

I have the same exact issue too lmao

[carmine swallow]

btw what is printing the stuff you type to the left of the screen? because its kinda annoying as it messes up any windows in there

[grand shadow]

to disable the console echoing stuff u need to use stty -iecho or whatever

I dont have something like linux which I think allows you to completely disable a vtty

so my startwm script just disabled echoing etc

[carmine swallow]

ah

[grand shadow]

I need to stop procrastinating and actually sit down and finish the vmm page locking code for dmaing into userspace and also some more optimizations

but my brain wants to read voxel raytracing papers instead

[robust geyser]

i wonder how i should handle console keyboard input with the evdev implementation

i wanted to create a mux input device which just gives you all events queued to any device but i realized that won't work because there's some more state i'd have to somehow replicate, each device can expose ABS_* limits (for ABS_X, ABS_Y and stuff like that) so that won't work with a mux device

[carmine swallow]

couldn't you make some kind of ioctl for that to query them for a device?

and store a device identifier in each packet so then the info can be queried either through the ioctl or got from a cache indexed by the identifier or smth

idk

[robust geyser]

that's not how evdev works

you can query limits for each type of event using an ioctl, yes

but they are per event type, not per event

so multiplexing events from multiple devices where they could have different limits wont work

[carmine swallow]

ah, yeah I haven't looked into how evdev works at all it was just a random idea lol

[opal lotus]

how does linux do this for tty

i assume they just mux all keyboards

[robust geyser]

¯_(ツ)_/¯

i am not gonna subject myself to reading linux source code

no, thank you

[carmine swallow]

it was like 24fps with 2 threads (and getaffinity stubbed to return that) but then when I wanted to try it with 8 threads it took almost an hour to load and runs like shit (even worse than with 1 thread at least in the menu, it just froze when I tried to click a button)

[grand shadow]

💀

[carmine swallow]

but tbh 24fps is pretty close to playable already

its not a huge stuttery mess like 5

[grand shadow]

there defo needs to be some smp work in astral to make it better

[carmine swallow]

and drm drivers

[opal lotus]

fun

[formal patio]

steal the new frigg sharded allocator

[lucid marten]

how did you manage to port factorio?

[carmine swallow]

well its not really porting its just running the unmodified linux build on a libc that is binary compatible with glibc enough for it to work

[bronze nexus]

Factorio multithreads certain things, namely I know for a fact these are distinct threads:

• Power network
• Fluid simulation
• Machines
  But IIRC there's slightly more

Looks like transport belts and trains are also distinct threads

[carmine swallow]

interesting, I just knew about the render threads because there is an option for it

[bronze nexus]

I think that's the limit of threads it spins up. I said threads here but what I really meant was more like in parallel.

They didn't go into very specific detail of how they start the threads themselves, but there's a decent chance this is a thread pool situation.

[opal lotus]

what happens if you run on one cpu

[robust geyser]

you can still have multiple threads on one cpu

but it won't help, and will probably hurt performance if your workload is compute bound

[gleaming bay]

What the fuck?

That’s sick

[grand shadow]

@carmine swallow do you expose/implement shmget/fstatfs on your libc?

I am looking at the fvwm3 logs and trying to see if it really isn't an unimplemented thing

because like, maybe it would shm to communicate the living processes to the sidebar or w/e

[carmine swallow]

they are enosys too, I didn't implement any new sysdeps that you didn't have in mlibc

except yesterday I implemented sched_yield because it was spamming it when loading factorio but that's not related to the fvwm thing

[grand shadow]

hmmmm

weeeird

disabling shm didn't help so like blegh I really will have to dive into the source

[grand shadow]

btw, do you plan on eventually upstreaming that kernel work?

[carmine swallow]

Yes I can make a pr with that + the AT_BASE stuff + whatever else there was

[grand shadow]

based

[proper meteor]

@grand shadow https://github.com/Mathewnd/Astral/blob/79466293b76d273e2d410a9a6da1fe6605b31dcb/kernel-src/io/pci.c#L131
aren't PCI register accesses supposed to be 4-aligned?

[grand shadow]

iirc as long as you don't cross a 4 byte boundary you're fine

[proper meteor]

alright

[wild marsh]

i'm pretty sure the access has to be naturally aligned

so 16-bit accesses need to have lsb clear in the address

[grand shadow]

oh

still, that code should be fine

[proper meteor]

i'll stay 4-aligned just in case

[analog berry]

4 aligned is the safe bet but yeah this works too

[robust geyser]

how the heck did you open this file, skip all of the functions that do the reading and come to the conclusion that it does unaligned accesses?

pci_read16 literally aligns it before reading

[gleaming bay]

😭

[opal lotus]

lmaoooo

[grand shadow]

Even I forgot that it does that and I wrote the fucking code

☠️

[opal lotus]

it happens

i don't think linus remembers every single line he wrote

[bronze nexus]

Nobody remembers every single line they write

[analog berry]

especially since most of them got replaced by corpo code lol

[grand shadow]

Been super busy lately so almost no work on this damn

[scenic epoch]

RIP

[grand shadow]

400 stars on github gg

[obsidian pivot]

https://cdn.discordapp.com/attachments/1061407633745125397/1284644688787279914/astral.gif

[opal lotus]

https://media.discordapp.net/attachments/594925688914706462/890948499380797460/makesweet-rvejc6.gif

[surreal wraith]

Contrags!

[viscid flame]

https://tenor.com/view/dead-chat-dead-chat-skeleton-gif-25954239

[flint condor]

https://tenor.com/view/1x1x1x1-forsaken-roblox-necromancy-i-gif-7683812168067572945

[obsidian pivot]

@grand shadow i got this while booting ur shit

on qemu

i used the images on ur site

and the qemu command in the pinned message

gl

[obsidian pivot]

it faults right after printing:

kernel_init: running routine arch_early

[grand shadow]

☠️ 🥀

no idea that image is super outdated by now

[obsidian pivot]

ill just build it myself bleh

[grand shadow]

there were some issues with monkuous' xsave detection code that iirc I have since then fixed

so that could be it

https://github.com/Mathewnd/Astral/commit/c9c2471796495453b0d75cfb3abaa05624d50a2a

[obsidian pivot]

DISTROTYPE=minimal make```
this is the command to build a minimal distro right

[grand shadow]

indeed

[obsidian pivot]

amazing

[grand shadow]

though iirc it now by default builds a minimal image and only builds the full image on a make disk

[obsidian pivot]

spotted in Makefile

(this is the only occurence of DISTROTYPE in Makefile)

[grand shadow]

which I mean you probably should boot it from disk anyways

so yeah just DISTROTYPE=minimal make all disk

then to run make run-disk-kvm

[obsidian pivot]

bleh why does debootstrap have to be so slow

"sh: 13: chroot: not found"

[grand shadow]

cro does not have coreutils installed 🥀

wtf

[obsidian pivot]

I: Checking Release signature
E: Invalid Release signature (key id 0E98404D386FA1D9)

🥀

[grand shadow]

maybe my jinx version is too old or something

don't have the energy to update it and go through every single package to fix any issues that appear

[obsidian pivot]

oh well

[grand shadow]

but thats still super weird considering a few weeks ago iretq managed to build it just fine

lemme do a fresh git clone and see if I get teh same issue

[grand shadow]

trolled

use a real distro other than debian

[obsidian pivot]

so this problem is literally just because im using debian

[grand shadow]

that and my outdated jinx probably

I mean I think u could maybe update the snapshot in jinx directly

[obsidian pivot]

ill just rename my keyring file for a second

[grand shadow]

change the debian_snapshot="" variable in jinx

[obsidian pivot]

change it to that?

[grand shadow]

change it to whatever gloire has in its jinxfile

20251202T083052Z

[obsidian pivot]

fix ur shit pls, doesnt work

[grand shadow]

talk is cheap send patches

[obsidian pivot]

[grand shadow]

I need to eventually update jinx

[obsidian pivot]

mathewnd why doesnt my fvwm-root thing work i get no wallpaper

is it just skill issue?

[grand shadow]

probably

it works for me

the only thing that doesn't work is the sidebar

but it worked in qwinci's libc

so I am inclined to think its something with mlibc

but I've never debugged it

[obsidian pivot]

other than like python what external dependencies did fvwm3 need

not including the libraries

[grand shadow]

it has been like almost 2 years no way I will remember that

[obsidian pivot]

damn

[marsh sparrow]

meanwhile xbstrap is still backwards compat to a 5 year+ old version

[obsidian pivot]

obos-strap always works as long as you are using my exact build environment

[opal lotus]

put it in a container

[grand shadow]

someone I don't recognize opened a pr and caught a very interesting issue

it seems like the osdev wiki page for the madt is just wrong

it does seem that there was some issue with how I handled the apic nonetheless

so maybe once I finish looking into that maybe that is what was wrong with ps/2?

since it does use the i/o apic

@analog berry though one thing I am not understanding, what should one do in the 00 case?

just have a table that maps irq -> mode?

ah wait nevermind I am stupid

[analog berry]

use the default for the bus type like it says

[grand shadow]

yeah

if that is what was wrong with ps/2 on real hardware its gonna be so funny

[analog berry]

could be

[grand shadow]

me: never able to get that shit working
random savior from github:

https://tenor.com/746G.gif

[analog berry]

how were u even able to make it this far with this bug

[grand shadow]

I have no idea

I guess qemu just did not care and I didnt use any other ISA interrupts

https://github.com/Mathewnd/Astral/pull/24/changes

yeah I only use it for like ps/2, the serial port and 32-bit hpet without msi

and acpi

I should probably fix that in the osdev wiki as well

[grand shadow]

there

anyways, if anyone whose ps/2 did not work before wants to try it again I would be thankful cc @fleet osprey @robust geyser

[fleet osprey]

alright, but I won't be able to test on the Optiplex 755 that had the fucked up PS/2 emulation

that machine died

will test it on the t14 gen 1 amd and the precision t1650 when I get home tho

[grand shadow]

Dang

[opal lotus]

not working on framework 13 :(

[analog berry]

u have wiki articles?

[grand shadow]

I mean as in, MADT article

[grand shadow]

updated image with super early logging enabled + some nvme fix

[opal lotus]

@grand shadow

[grand shadow]

This guy got a point

I gotta add that to astral to stay relevant

[viscid flame]

2026 hard osdev reality

😔

[elfin turtle]

as long as you prefix every sentence describing your OS with AI you will make billions

you don't even need to finish the sentence, when an investor reads the sentence their brain turns off after AI and they will give you millions

[grand shadow]

Ai in kernel making scheduling decisions

[elfin turtle]

lol

[willow rapids]

he is missing one thing, make the ai generate the gdt at runtime

[viscid flame]

btw did you ever vibecoded something in astral

[grand shadow]

Astral is fully handwritten slop

[marsh sparrow]

⁨⁨```
$ gcc main.c
You have reached your daily Astral limit, how would you like to proceed?
[*] Learn about Astral Plus™ offers -- 3000 daily commands for just $9.99 if you buy within the next 3:24
[ ] Watch 2 minutes of ads to unlock an extra 100 Bash commands
[ ] Wait for your limit to reset

[fleet osprey]

adopt a semi-proprietary model like Chromium vs Chrome, Code OSS vs VS Code, etc

Astralium (FOSS) vs Astral (proprietary)

Astralium is just a shitty kernel shell, Astral gives you a full OS

[marsh sparrow]

this idea has a lot of potential, what about some GCC patching:
⁨⁨```
$ gcc main.c
main.c: In function ‘main’:
main.c:2:9: error: implicit declaration of function ‘print’ [-Wimplicit-function-declaration]
2 | print("hello world");
| ^~~~~
While programming is a lot of fun, remembering the exact header that contains a specific standard library function can be exhausting.
That's where today's sponsor Brilliant.org comes in. Brilliant offers courses that make it easy to refresh your C knowledge. Sign up with code Astral to get 20% off in your first two months.

[prime mulch]

this is already a thing just not LLMs

i think linux has at least one scheduler based on a neural net lol

[marsh sparrow]

but it probably (hopefully?) doesn't evaluate that in the kernel, right?

[grand shadow]

We need llms for the max hype farming

[somber wraith]

Astralium is newlib, busybox, and tcc, astral is mlibc, gnu {core,find,diff}utils/bash, and gcc

[fleet osprey]

nah, too complete

you can't let them unlock the "full" version

technically with newlib, busybox, and tcc, you could (with enough pain and suffering) build your own copy of mlibc, all of the gnu stuff, and gcc

[neon crane]

every copy of Astral is personalized

[gleaming bay]

It generates a profile based on a quiz and automatically edits the kernel using ai to be more efficient to your use case

[prime geyser]

that’s so 2024. You need ✨ AI

port llama2.c or something of that calibre

[grand shadow]

Im thinking of porting a new wm/de

Maybe I finally take the cde pill

[robust geyser]

Do xfce

:)

[analog berry]

kde

[robust geyser]

not even managarm has that so

i wouldn't get my hopes up

[analog berry]

well astral is always one step ahead in ports

[robust geyser]

well, kde is not gonna be it 💀

considering you need logind

udev

all that uh

[analog berry]

never underestimate mathew

[robust geyser]

yeah

i don't think bro is gonna port systemd

but tbf kde with openrc is possible

elogind exists, sadly

kde would be sick tho

but xfce is nice :^) and xorg, mathew likes that

[obsidian pivot]

when wayland

[robust geyser]

probably never

need libinput, need udev, need netlink

[analog berry]

when mathew adds drm

[robust geyser]

💀

and drm i guess

[obsidian pivot]

when uDRM

[robust geyser]

u need the kernel drm interface

[analog berry]

@ marvin

[obsidian pivot]

didnt that project have like 5 commits and was ditched

lmao

[analog berry]

yes

[obsidian pivot]

and that uDrivers thing

[robust geyser]

i should work on fusl

not calling it uUSB

[obsidian pivot]

ahhhhrhehhshshs USB

[analog berry]

uSB

[obsidian pivot]

micro serial bus

[opal lotus]

https://tenor.com/view/minion-rain-sofela-gif-884905725896610874

[opal lotus]

new project #21378472987345928374

[winged basin]

Were that true KDE would not run on FreeBSD (no logind and no true udev) but it does

[grand shadow]

I will simply port the windows wm

[analog berry]

astral copilot when

[viscid flame]

i3wm

download dotfiles from some github repos and post it to r/unixporn

[fleet osprey]

steal it from ReactOS

[grand shadow]

So much to do and so little {time,motivation} to do it

I need to get back on this

Last thing I was doing was a proper memory locking thing for dmaing directly into userspace without breaking posix fork semantics

[neon crane]

just declare it UB if you try to fork while another thread is doing a read/write

[grand shadow]

So true

Everything is ub so the program should not expect any behaviour at all

There is a 3.33% chance a open() instead deletes the file

[fleet osprey]

int two = 1 + 1 is now UB

may cause a triple fault

[neon crane]

...I was serious

it should be UB to do a fork during read/write

[opal lotus]

port xfce4

[marsh sparrow]

That'd basically amount to: multi threaded programs cannot spawn new programs

which would be severely limiting

[neon crane]

Do not spawn new programs while you are reading and writing

Or expect some writes from your parent to still go through as a child

UB doesn't have to mean "crash"

[marsh sparrow]

How do you ensure that w/o very heavy locking?

[marsh sparrow]

Or you could just implement this properly in the vmm. It's not particularly hard compared to the other challenges of a vmm

[neon crane]

How do you "implement this properly"?

so the logic is, while you are performing a read(), reading from that data is UB, because you either have old data from before the read(), or actually new data. if you perform a write(), writing to the buffer during that is UB because the data written will either be old data or new data.

if you fork a process while reading, you'd be taking a snapshot of the data during a read.

if the read() happens to finish then you just have the new data.

if you start messing around with the buffer while the data is still being read in in the parent process you're probably doing something wrong even if you don't know it, since you're implicitly accessing another thread's state (the former thread that used to be in the parent but didn't come in with the child)

that's like if a thread poked and prodded into another thread while it's reading/writing, except only until the point of the extant read finishing, and only as long as you don't write to that memory, because otherwise CoW applies

[wild marsh]

doesn't a similar race exist with just normal anon memory that gets CoWed?

one thread is writing to a buffer while another forks

ah no i didn't read the context

[marsh sparrow]

ah, that's true but I believe that's not the issue that matheus was talking about (?)

the valid outcomes if a read() and fork() happens at the same time are:

• neither parent nor child have modified data
• parent has (partially) modified data, child has a copy of the old data
• both parent and child have (partially) modified data but the child has a private copy (either via CoW or an actual copy)

what's certainly forbidden is that the child first sees unmodified data and then modifications happening

[neon crane]

no. the race happens after

[neon crane]

my OS would probably be susceptible to this issue right now, since read/write operations take strong references to the pages backing the buffer

so as long as neither the parent nor child write to the memory they both see the new data

[marsh sparrow]

Managarm certainly implements this properly

by eagerly copying pages that are currently DMAd to

instead of using CoW for them

[neon crane]

sure. I could do that. but in reality, what is the risk that this happens, and that this affects anything? whatever the child process sees it probably won't understand

chances are it'll be half-read data (parts of old data and parts of new data)

or the entirety of new data

or the entirety of old data

whatever it is, this state is "expected" during a read, and a thread probably isn't interested in reading from this buffer unless it's fully read

[marsh sparrow]

i think much more subtle things are possible

if the child can see DMA modifications happening after fork

for example:

• T1 fork()s
• T2 allocates memory location P and read(P)s
• the allocator page is processed by fork() before T2 has allocated (and hence location P is free in the child)
• the child allocates memory location P and uses it for something else

(malloc() itself is not async-signal-safe, but if you use your own allocator that doesn't need locks, this would be allowed by posix)

a less stupid example is if you DMA to the stack

• T1 fork()s
• T2 read()s to a buffer on T1's stack
• the child does something else with the same stack space (e.g., by returning from the current function)

[neon crane]

the child doesn't allocate memory location P for something else because the page is pinned

[marsh sparrow]

Hm?

by memory location I meant virtual address

[neon crane]

the pages backing the buffer are pinned

so if you unmap that buffer and map something else, the same virtual address will have different memory and won't be affected by the ongoing "DMA"

at least that's how it works in my OS

[marsh sparrow]

well the buffer can already be allocated

[neon crane]

if you mean that e.g. the buffer is malloc'd, then free'd, and then someone mallocs something on top, and the allocator didn't decide to unmap anything, then yeah, there is a problem

[marsh sparrow]

i'm sure that you can get into situation where some thread in the parent does read(P) and the child uses virtual address P for something else at the same time

[sharp carbon]

uint32_t value = 0xcccccccc;
if (fork() == 0) {
    assert(value == 0xcccccccc); // this must not fail, but with your scheme it can
    _Exit(0);
}
int fd = open("/dev/zero", O_RDONLY);
read(fd, &value, sizeof(value));
close(fd);

the initializer for the value means that the stack page it occupies is allocated before the fork

if the read does dma (it wouldn't since it's /dev/zero but pretend it's some other file and it's using O_DIRECT) before the child gets to the assert, the child would see the new value

[neon crane]

No, it can't

With my current scheme, read() pins the pages after the fork(), so the pages are eagerly copy-on-write-faulted

Meaning the address of value is already replaced with a new page by the time the actual "DMA" takes place.

You have to use two threads for this

And the fork has to happen during the actual read operation, but after the pages have been pinned

[sharp carbon]

right

[opal lotus]

bro has been typing for 20 minutes 😭

[sharp carbon]

okay revised example

#define BUFFER_SIZE 0x1000

static int can_read;

void *do_read(void *ptr) {
    int fd = open(tmpnam(NULL), O_RDWR | O_CREAT | O_EXCL | O_DIRECT);
    ftruncate(fd, BUFFER_SIZE);
    while (!atomic_load(&can_read)) {
        futex_wait(&can_read, 0);
    }
    read(fd, ptr, BUFFER_SIZE);
    close(fd);
    return NULL;
}

int main() {
    uint8_t *ptr = mmap(NULL, BUFFER_SIZE * 2, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
    pthread_t thread;
    pthread_create(&thread, NULL, do_read, ptr);
    memset(ptr, 0xcc, BUFFER_SIZE);
    atomic_store(&can_read, 1);
    futex_wake(&can_read);
    while (atomic_load(&ptr[0]) == 0xcc) {
        // spin until read has begun
    }
    if (fork() == 0) {
        memcpy(ptr + BUFFER_SIZE, ptr, BUFFER_SIZE);
        sleep(1);
        assert(memcmp(ptr, ptr + BUFFER_SIZE, BUFFER_SIZE) == 0);
        _Exit(0);
    }
}

[sharp carbon]

you try writing c code in discord on your phone

[opal lotus]

been there, done that

[sharp carbon]

anyway with this code it's possible that the child starts execution before the read has finished

in this case the read will finish during the child's sleep call

with your scheme the two copies of the data in the child wouldn't be the same, since the bottom half of the buffer has the finished results of the read while the top half has the unfinished results that were copied before the read was done

[proper meteor]

@grand shadow why - 1 on the entry count?
https://github.com/Mathewnd/Astral/blob/152f1ef94a159faf4a5b6a01e45475f97fb6a8bf/kernel-src/io/block/nvme.c#L444

[opal lotus]

it's a 1-based count

aka a value of 0 means 1

[proper meteor]

huh

[robust geyser]

not that crazy

[opal lotus]

read the spec 💀

[robust geyser]

same with the read/write io commands

you provide nlb=0 if you want one block

[formal patio]

how cursed do you think it would be to use Astral as a test kernel/OS for lil?

I'm basically looking for something that I can quickly run in QEMU + real hw, that has a sane build system, and preferably can be netbooted

[marsh sparrow]

what would the advantage be over Managarm?

[formal patio]

if it's trivially netbootable, convenience and having a second impl to check against

being monolithic is a big plus bc that would verify the capability to build it freestanding

[marsh sparrow]

why would it be more easy to netboot than Managarm?

[formal patio]

the pain of managarm is not the netboot itself

[marsh sparrow]

well, my question is what the pain is lol

[formal patio]

ehci memes etc

I just want an easy testbed for validation

[marsh sparrow]

you won't run into ehci memes when you netboot

and astral doesn't have ehci anyway (?)

[viscid flame]

it have only xhci

[grand shadow]

update: astral will have a permanent install on a real machine starting next month so some of my development will now pivot to writing drivers for it

it'll be on an older amd64 machine at my uni

[proper meteor]

no way

[marsh sparrow]

nice, what dirvers do you still need?

[grand shadow]

ahci + rtl8169 (I think, waiting for a lspci -nn to confirm) + maybe xhci

indeed

10ec:8168

[grand shadow]

the first thing I'm gonna do is probably the nic, since it seems simpler

then ahci then maybe finishing the xhci work with iretq

the page cache rewrite being pushed once again but it is what it is

[marsh sparrow]

NICs are also generally the most useful devices

since if you have a NIC you can ssh in or transfer logs out etc

[grand shadow]

true

[obsidian pivot]

I have multiple r8169 devices if you want me to test it

[grand shadow]

lmfao osdev wiki

[grand shadow]

would be cool

[obsidian pivot]

I could send u a spec

[grand shadow]

I got it

https://people.freebsd.org/~wpaul/RealTek/RTL8111B_8168B_Registers_DataSheet_1.0.pdf

[obsidian pivot]

oki

my pc also technically has the r8169 but its a newer NIC

[fleet osprey]

Oh nice more datasheets to grab

[obsidian pivot]

that may or may not work with your driver

ik it doesnt work with mine

and i used that same spec

ig I should've actually paid attention to the mac type specific init code

[obsidian pivot]

all haswell era hw

btw

[proper meteor]

https://github.com/Mathewnd/Astral/blob/152f1ef94a159faf4a5b6a01e45475f97fb6a8bf/kernel-src/io/block/nvme.c#L484
here you do - 1 too but the doc say it is zero-based. Is there something I don't understand?

[wild marsh]

zero based => value of 0 means 1, value of 1 means 2 etc?

[formal patio]

NVMe 1.3d, 1.5 Conventions, p. 12

[grand shadow]

what is the osdev controller code doing bruh

it sets the 9346CR register while its completely unescessary

it does not write to these registers at all

https://tenor.com/bt0g4.gif

also sets a reserved bit

trolled

[obsidian pivot]

which one

i need to make sure i dont accidentally do that

[grand shadow]

I misread that

oops

[analog berry]

I cant believe u use osdev wiki as driver writing guide lmfao

[grand shadow]

I was using it to figure out where to begin I always cross referenced it with the specs

unless you want me to vibe code this

also wtf why does qemu not support msi for this

thats just stupid

[analog berry]

That might end up being more productive tbh

[grand shadow]

I really do not want to get into pci pin bullshit

but ig I might have to if I want to test thi sout

[analog berry]

Its pretty easy since you already have uacpi anyway

[grand shadow]

time to learn how to do that with uacpi and how I am gonna abstract that away

probably just have each driver register a handler callback and have every pin have a list of callbacks

[carmine swallow]

I guess it might be because it only supports the older model of it in general (though that wouldn't still prevent qemu from having a msi=on switch on the device like it does with eg. hda)

[grand shadow]

if I knew how the qemu codebase worked I would have honestly tried to implement it but I have no idea how to even begin there

[analog berry]

See managarm source ig

[carmine swallow]

(I just wanted to see how hard would it be to add msi support to it and turns out its not hard at all, I just looked at the hda driver and copied the msi code from there slightly modified to fit the rtl8139)

[grand shadow]

interesting

[grand shadow]

damn if I had rewritten the device driver handling this would've been so much easier

[obsidian pivot]

huh what

qemu doesnt have r8169... at all

[grand shadow]

it has a similar nic

and that does not have msi

[obsidian pivot]

r8139?

[grand shadow]

yeah

[obsidian pivot]

ic

[grand shadow]

oh wait I dont think they are even compatible

☠️

I'm stuopid

[obsidian pivot]

no not really

Linux has a separate driver for it iirc

[grand shadow]

welp

that was useless

I dont think any emulator implements it soooo

you'll test for me

[obsidian pivot]

yea sure

[obsidian pivot]

fun fact my network stack was originally only ever tested on real hardware since no emulator did r8169 and it was the only nic I had for a while

but uh I would test it on my laptop but its ethernet port has ran out of hopes and dreams

(it used to run on hope and dreams but it ran out)

((maybe it needs to be filled with determination?))

cc @mild sentinel

[mild sentinel]

@obsidian pivot my desktop uses the same Linux driver right?

Also I got another 4 hours of off forsaken sleep

[mild sentinel]

So I should be able to test it

[mild sentinel]

After I sleeep

[marsh sparrow]

i can't imagine that LLMs are good at driver writing

the sample set is small and the LLM can't really iterate to test it

unless you somehow hook it up to real hw

[flat copper]

they'd just turn into copypaste engines (well, more than they already are)

with license and quality implications

[marsh sparrow]

yeah

[carmine swallow]

at least its somewhat compatible with rtl8168, idk about the 8169 tho

[obsidian pivot]

the rtl8168 and rtl8169 are more similar to each other than they are to the r8139

afaik

[carmine swallow]

at least in my driver there are like 3 small differences between the 8139/8168

granted there might be more regarding the phy setup (and probably is), that's something that I haven't properly done lol

[grand shadow]

well good news and bad news

[somber wraith]

yay! (and aww)

[grand shadow]

good news? apparently my desktop has an 8168

bad news?

I don't think I can pull an ethernet cable to my room dawg 💀

[fleet osprey]

[grand shadow]

maybe if I buy a super long one

[fleet osprey]

I have a bunch of PCs with Realtek 816x NICs that have cables run to them

[somber wraith]

do you have another device in your room that runs linux (and has an internet connection)

[fleet osprey]

so if you need me to test stuff then sure, send it over

[grand shadow]

closest thing is a laptop with wsl

oh wait

I do have one

a laptop from 2004 with linux from scratch 🥀

[somber wraith]

that works

[grand shadow]

that I don't even know if it boots

[somber wraith]

it has an ethernet port and a wifi card right?

[grand shadow]

yeah

[somber wraith]

ok, then you can make a network bridge

networkmanager makes this super easy

you act as a router basically, and can either NAT or just plain forward the requests for the ethernet device

[grand shadow]

guess I gotta pull out the good old dell latidude 110l

smart honestly

its gonna make life much easier compared to having to send the iso over to other ppl

it was just by chance that I opened the windows device manager to look at what my NIC is

and saw that it literally matches 1:1 the vendor:id of the rtl8168

wonder if you can use windwos for that because I really really do not want to search for the charger of that laptop

apparently windows has something called ICS?

this comes with the benefit of being able to wireshark, which sounds nice

oh right

I need to buy a fkin usb stick

good thing theres a place selling them nearby

[mild sentinel]

you can get powerline adapters

[robust geyser]

you can select two adapters, right click and select "bridge connections" in ncpa.cpl

not sure what kind of bridge it creates though, so if that matters to you then you should use linux lol

[grand shadow]

I jus want a working NIC driver

so if I can get that shit talking its profit

[grand shadow]

anyhow, I think I have all of the initialiaztion including phy stuff working

well not working

haven't tested

but its there

so I am writing the interrupt code and then I will hook it up and test

[marsh sparrow]

for testing you don't even need a bridge

[grand shadow]

okay so I think I have the whole driver written now

its not perfect but its probably enough for now

tomorrow I'll buy a usb stick and test it

I have pushed the code

or rather would have if my gh token hadn't expired

there

[obsidian pivot]

no ssh key?

https://tenor.com/view/megamind-gif-26070434

[grand shadow]

well today is carnival so all the stores are closed

testing will have to wait till tomorrow

[mild sentinel]

could i help you test it?

@obsidian pivot said we had similar nics right?

[grand shadow]

if u want to I can send an iso

[mild sentinel]

send one over il boot it on my desktop

no virus right

[grand shadow]

I can't even write to non nvme disk 🥀

[mild sentinel]

i only have nvme

better not corupt my stuff

[grand shadow]

maam your computer has virus

[mild sentinel]

im gonna redeem

i need to test this as excuese to not make PMM & paging code rn

[grand shadow]

what vendor:id is your card btw, the driver is hardcoded to realtek:8168

[mild sentinel]

how i check that on linux? sudo lspci -vvvv or some thing

iirc? the linux driver r8169 supports the RTL8111H and r8168?

[mild sentinel]

here we go 10ec:8168

[grand shadow]

lscpi -nn

ok just from the name I think its the same nic

[mild sentinel]

send over ISO and lets try it

if it dosnt work il help you debug

[grand shadow]

@mild sentinel @obsidian pivot pick the initrd option

[mild sentinel]

does this include the cool minecraft port

[grand shadow]

the initrd does not

it only contains the bare minimum really

but if you can connect it to the internet I think you could xbps install everything

as long as you have enough ram for it 💀

[mild sentinel]

32gb

should be enough right

Okay rebooting into it now

Thank you REFIND for not making me go into my BIOS

@grand shadow how long is it expected for there to be a black screen with the initrd option?

[grand shadow]

💀

wtf

like not long at all

[obsidian pivot]

will do

once im back home

[grand shadow]

let me send you the early boot logs

[mild sentinel]

You do support AMD hardware right

[grand shadow]

how big is your screen btw

[grand shadow]

think so

[mild sentinel]

1080p

[grand shadow]

wtf

[mild sentinel]

I do have 3. Monitors tho?

One is vertical too

@grand shadow I do have an idea to make the PC speaker be able to output debugging logs if that could help 💀

[grand shadow]

this should have early boot logs enabled (flanterm set up the earlist thing possible)

czapek also had some issues with a black screen booting astral and it was something related to flanterm init, maybe I need to update flanterm or smth

I havent personally really tested in real HW in a long while so maybe there was some regression on all real hw boots

[mild sentinel]

I also have an Intel laptop and another amd laptop I can test on

@grand shadow page fault

Looks like null derefrence

Also no stack trace

[analog berry]

Kernec

[mild sentinel]

kerneç*

[grand shadow]

uh oh

that explains why the screen was black

[mild sentinel]

Uhhh any idea what could be causing it

[grand shadow]

gotta find out

[mild sentinel]

Want me to test on that Intel laptop?

Maybe it’s a uACPI bug

[grand shadow]

its in pushlock.c

https://tenor.com/view/skull-skull-skull-skull-skull-skull-skull-skull-gif-14574828933741070167

probably acquiring a pushlock on a slab which is not craeted somehow

I should really add a backtrace print to my panic function at some poin

[mild sentinel]

This is why I test hardware before pushing any commit

[mild sentinel]

Steal my super crappy implementation for now that is prone to panicing its self

@grand shadow it is working on an Intel laptop it seems AND OH SHIT IT HAS THE SAME NIC

I saw the driver pop up

[grand shadow]

yo??

[mild sentinel]

Let me plug in Ethernet

How should I test it from there

[grand shadow]

u'll have to reboot to get the nic to work again after plugging it in btw I don't really reset the phy and do autonegotiation on a link up irq

[grand shadow]

uhh plug it in, reboot, run netd rtl8169.0

or whatever the device node is called in /dev/

[mild sentinel]

Okay let’s see if this works

Failed to bind to device??

[grand shadow]

uhh does the node exist in /dev

[mild sentinel]

It shows in ls

[grand shadow]

oh u don't need the /dev/

it'll append it to the path automatically

also crazy ps/2 works

[mild sentinel]

Okay what should it be outputting

Because it says it’s hardware address all 0s

[grand shadow]

can u send a pic of what its outputting to see if everything else is ok

also nice seems like the nvme driver also works

[mild sentinel]

That’s all it said before hanging

[grand shadow]

oh it just locked up damn

[mild sentinel]

And control C isn’t working

[grand shadow]

does a ctrl+C kill it or

[mild sentinel]

Nope

[grand shadow]

oh we LOVE deadlocks

[mild sentinel]

But it shows the words

So it’s not deadlock deadlocked

[grand shadow]

hmmm

[mild sentinel]

It just can’t take the signal?

[grand shadow]

probably is just stuck somewhere

[mild sentinel]

Shouldn’t the signal override that

[grand shadow]

and that 00:00:00:00:00 is sus

[mild sentinel]

Well clearly the driver is doing somthing

[grand shadow]

during the driver init does it like print the mac address properly?

maybe it doesnt have a preconfiured one or something

[mild sentinel]

MATHEWND IS BEST KERBEL DEV
100% NOT HACKED ACCOUNT

[mild sentinel]

How should I check

The bootlogs etc

[grand shadow]

it'll print the driver maybe just record a vid and see what it prints

I don't have a dmesglike ringbuffer yet

[mild sentinel]

No dmesg

[grand shadow]

which is also another good idea to have probably

oh yeah to reboot can u do like

reboot

oh press the power button

[mild sentinel]

Well it’s locked up

[grand shadow]

just to see if acpi is working

[analog berry]

holy

[mild sentinel]

And power button made it goto sigKILL before I just held power button

But the shutdown command worked earlier

[grand shadow]

oh thats working then

[analog berry]

what does that even mean

[mild sentinel]

Btw what prize do I win for helping

[grand shadow]

send sigterm
send sigkill
sync
reboot

[grand shadow]

a paperclip and some bottle caps

[mild sentinel]

My phone at 3%

let me charge my phone

To take video 😭

[analog berry]

as long as it doesnt cause any kernecs

its good

[mild sentinel]

The c has a diacritic ç

Gotta keep that in mind

[analog berry]

true

[grand shadow]

ççççççççç

ç is right next to l on my keyboard

[mild sentinel]

Have an astral mirror on my git server

I actually ended up having to mirror limine and flabterm

Because codeberg was crashing

So my friend couldn’t make the build system work 😭

[grand shadow]

https://tenor.com/view/aokiji-akainu-battle-two-side-gif-10500515882138008504

[mild sentinel]

https://git.evalyngoemer.com/mirrors/Flanterm-temp

[grand shadow]

codeberg and freedesktop.org on a downtime competition

[mild sentinel]

TS is kinda funny

• the git history gonna be wiped once i686 is done and the repo fully cleaned up to standards by me anyways so

[willow rapids]

oh on mine its next to enter

[mild sentinel]

I’m an American scum so I don’t have that key at all

Except on my phone

[willow rapids]

so instead of accidentally terminating messages in \ i would get ç, but since i use the us layout mostly nowadays then yeah

[mild sentinel]

Oh it page faulted this time @grand shadow

[grand shadow]

during uacpi init, spooky

[analog berry]

try mammogram or pmos or obos

[grand shadow]

can't really make out the rip

[mild sentinel]

This isn’t good @grand shadow

[grand shadow]

hey

at least its printing the mac address correcltly there

[mild sentinel]

It went on more after it locked up

And I stoped recording

😭

[analog berry]

holy

yeah this and bad checksum tells me crazy memory corruption

[grand shadow]

how tf did this not happen on the first boot

[mild sentinel]

Magic

[analog berry]

probably because it dirtied some memory

maybe u have uninitialized reads somewhere

[mild sentinel]

It survived two boots

[analog berry]

🤷‍♂️

[grand shadow]

let me see if reseting on qemu breaks things

[mild sentinel]

[analog berry]

make sure it doesnt clean the memory

[grand shadow]

I ran it with randomized limine memory some weeks ago and it worked fine

[mild sentinel]

I better be getting extra pocket lint with my paper clips and and bottle caps for this

[analog berry]

maybe a race condition or smth

or something that triggers with a specific amount of physical memory

[mild sentinel]

Trying once more

If this dosnt work your cooked 🥀

AstralV2 time

[grand shadow]

tried with randomized memory again and it works

[mild sentinel]

Yeah 🥀

[fleet osprey]

gotta run it infinite times so that you test every possible value in every possible byte across the entire memory space

[mild sentinel]

Do you have a specialy tessellated void to test this

[fleet osprey]

nope

[grand shadow]

thats an AML_READ() in uacpi

🥀

does a cold boot give such problems?

[mild sentinel]

It it a UACPI bug?

[mild sentinel]

This was a cold boot

[grand shadow]

I doubit its a uacpi bug

[mild sentinel]

🥀

[mild sentinel]

It also is an HP laptop

[analog berry]

nah highly doubt it

[mild sentinel]

HP = Have Problems

[analog berry]

we need a mammogram boot test

[mild sentinel]

Can you get me managarm ISO to test on here

[fleet osprey]

I've always thought of it as HP = Hinge Problems, or Huge Problems

[grand shadow]

I'm gonna see if I can fix that first slab bug, maybe theres an allocator issue that I have not found

[analog berry]

yeah

[mild sentinel]

It’s many things at once

[grand shadow]

which is weird because this allocator works perfectly fine otherwise (ran stuff like meicnraft and wine)

[analog berry]

#1217009725711847465 message

[mild sentinel]

That will cost an extra napkin ontop of the paper clips pocket lint and bottle caps

[analog berry]

how rich do u think the community is

[mild sentinel]

You have enough to afford ram

[analog berry]

had*

[mild sentinel]

Well we can do a payment plan

[analog berry]

also maybe my ram is a google drive swap partition

[fleet osprey]

$1000/mo for 5 years might get you 2GB

[mild sentinel]

how should i burn this image

unzip it?

[analog berry]

unzip and dd

[mild sentinel]

flashing

okay that makes it worse

😭

with the thing math said

[analog berry]

wdym

[mild sentinel]

well the reaction

[analog berry]

ah

[mild sentinel]

why is the image 4gb exact

[analog berry]

good question

[mild sentinel]

is it a disk image?

[analog berry]

yes

[mild sentinel]

so it has R/W space etc?

[analog berry]

i guess so

[mild sentinel]

Uhhhh so

@analog berry

[analog berry]

yeah thats a known issue

it made it past uacpi init

[mild sentinel]

Ahh damn

[analog berry]

so yeah an astral bug

[mild sentinel]

Wait let me try some extra boots

[analog berry]

yeah give it a shot

if u wanna get rid of that assert you will have to comment out some code

[mild sentinel]

Also the printing on here is much faster

[analog berry]

but it doesnt matter much

[mild sentinel]

Kernel mode setting for the nvidia GPU?

[analog berry]

nah, it allocates from an irq handler

which was prohibited recently

so now it dies

[mild sentinel]

No I mean

For why it prints so fast

[analog berry]

ah good q idk

mammogram is just fast

[mild sentinel]

Okay it did more stuff before failing there?

[mild sentinel]

The terminal emulator I guess isn’t flanterm?

[analog berry]

its sorta non deterministic when it will trigger the assert exactly since it depends on when the embedded controller irq comes in

[mild sentinel]

Ahhh

[analog berry]

probably

[carmine swallow]

yeah its not flanterm

[mild sentinel]

What do you use for the terminal

[analog berry]

https://github.com/managarm/managarm/blob/a2692a7bb0e73ee37969168569f3864afa029925/kernel/thor/system/acpi/ec.cpp#L195 basically this code

[grand shadow]

how many cpus does this machine have?

[analog berry]

causes the assert

[mild sentinel]

It’s an Intel P/E core machine

Let me check in shitdows

[grand shadow]

https://cdn.discordapp.com/attachments/1439385545221345320/1456588673494810746/attachment.gif

I'm thinking it might be something related to it using huge slab sizes when the cpu counts passes a certian point so I just wanna confirm

[mild sentinel]

I mean I saw it giving CPUids of like 40 somthing

[grand shadow]

wait how did u

it never even got to that part of the boot

[mild sentinel]

CPU46

[grand shadow]

wait is that the same machine?

[mild sentinel]

Yes

This is the laptop

[analog berry]

astral has race conditions 😱

[grand shadow]

I thought u tested on like a desktop the first time

which had the black screen

[mild sentinel]

It never got any further on there

So I switched to the laptop

[analog berry]

probably because logging was disabled

[mild sentinel]

I enabled logging

[grand shadow]

the desktop is the one which had that slab page fault right?

[mild sentinel]

The desktop had page fault yeah

[analog berry]

ah

[grand shadow]

and how many cores does it have

[mild sentinel]

8c/16t

[grand shadow]

ty

bam, I can reproduce it here

[analog berry]

which bug

[grand shadow]

the slab init page fault

[analog berry]

ah good

[obsidian pivot]

yes because obos boots on 100% of hw

[grand shadow]

oh its calling into a alloc before the alloc infrastructure is set up

awkward

[obsidian pivot]

when in doubt disable smp

[grand shadow]

yeah its because theres enough cpus for it to become an indirect slab

which calls into the main allocator

oops!

[mild sentinel]

Chat I may have to go and work on my kernel

So no more debugging right now

[grand shadow]

thats fine, I gotta debug ts

[mild sentinel]

https://tenor.com/view/exterminador-do-futuro-gif-20118743

[carmine swallow]

managarm uses custom font rendering for the boot logging, idk if its maybe the fact that it draws the text of the lines scanline by scanline up to down (first drawing the first line of all chars of the line, then second etc)

[grand shadow]

I'll ping when I got a new iso

[carmine swallow]

that's probably better for the cache than drawing individual characters fully

[analog berry]

doesnt flanterm also have this otpimization

[mild sentinel]

That way when it scrolls it manages to update faster?

[analog berry]

yeah because WC works properly in this case

since the entire cache line is filled before eviction

[mild sentinel]

And is the terminal a userspace server I presume?

[analog berry]

i mean it runs before userspace so probably not

[carmine swallow]

and its not really a full terminal as you can't type in it

[mild sentinel]

I think somebody here said having a terminal emulator in the kernel would be against micro kernels for debugging logs

Exactly like this is doing

[analog berry]

well its just a text sink in this case

not a terminal per se

it would be hell to debug otherwise

[mild sentinel]

Well yeah but it would have the same things except there isn’t a keyboard or such hooked into it

[analog berry]

perhaps

[grand shadow]

I think the solution is to just turn that alloc() into a cache of itself

[prime mulch]

astrole

[grand shadow]

casserole

[carmine swallow]

I think it kinda does yeah, though as the actual fb putchar function is called through a function pointer it probably can't optimize stuff like the line byte offset calculation

[analog berry]

true

[mild sentinel]

Could LTO allow this?

[analog berry]

if it can devirtualize the call but idk how easy that is

like its an optimization that exists for c++ virtual functions

[grand shadow]

@mild sentinel @obsidian pivot new iso with early slab crash (hopefully) fixed

cc @robust geyser since I think this also happened on your machine

I think this is also what caused that black screen

since the slab init can run before the term init as one does not depend on the other

[carmine swallow]

I wonder whether I should test astral on an old samsung laptop that I have

[analog berry]

yes

[grand shadow]

I just noticed I never actually copy the mac address to the actual netdev struct

wooooops

[mild sentinel]

want me to wait for that fix?

[carmine swallow]

(or well its not really an actual laptop anymore as I removed the casing and screwed the mobo + screen to a piece of wood)

[grand shadow]

do so

its compiling its just a one liner

[obsidian pivot]

ok

[sage locust]

should i test something too?

[grand shadow]

if u want

[mild sentinel]

flashing rn

sorry got distracted

@grand shadow it boots on the laptop again but i forgor the ethernet

leme test desktop

@grand shadow

[grand shadow]

banger

[mild sentinel]

Is that what it’s meant to do now

[grand shadow]

I have no idea why it is doing that, I guess I can add some debug prints

[mild sentinel]

Does it do this on QEMU?

@grand shadow I don’t think it is even able to SIGKILL it

💀

It’s stuck

[analog berry]

its crazy that ps2 works

[mild sentinel]

How is it crazy that ps2 works?

USB dosnt even work

💀

[analog berry]

because astrals ps2 driver is known to not work literally anywhere

even in vms

[mild sentinel]

It’s a QEMU bug then

[winged basin]

traditionally you have at least a minimal debugger in the kernel and that can also provide a rudimentary console

[mild sentinel]

Let me test a third device

If it works there

Uhhh

💀

[analog berry]

did it blow up

[mild sentinel]

Nah works fine

[analog berry]

damn

[mild sentinel]

Skill issue?