git operations hang the system

[jackburton]

I created a new VM with haiku beta4 (x64) I'm using it to develop. After a while, doing any git operation (on haikuports repo) results in git hanging. If I try to kill the git process, the whole system sort of hangs (but I'm still able to move windows around).

I tried upgrading to master but the problem persists.

I'm using qemu/kvm on Ubuntu 22.04 with 2 vcpu and 4GB ram. I've tried different NIC drivers (e1000, virtio, rtl8169) but without changes.

It's hard to give more info since I cannot open anything while the system is hanged.

[korli]

qemu with "-serial stdio" will output the serial log, if the syslog to serial output is enabled. Please provide this log.

[waddlesplash]

And if the syslog does not contain the relevant data, a KDL session may be needed to find what the system has deadlocked on.

[jackburton]

I did a "git status" multiple times, and it worked correctly. Then I did a "git stash" and it hanged. I can launch new Terminals, move around windows, but Deskbar menu doesn't open, nor I can open any new Tracker window. Doing a "ls" in another terminal hangs as well.

Syslog doesn't show anything useful:

slab memory manager: created area 0xffffffff8e801000 (9264)
slab memory manager: created area 0xffffffff8f001000 (10536)
slab memory manager: created area 0xffffffff8f801000 (10537)
slab memory manager: created area 0xffffffff90001000 (10538)
slab memory manager: created area 0xffffffff90801000 (10539)
slab memory manager: created area 0xffffffff91001000 (10540)
slab memory manager: created area 0xffffffff91801000 (10541)
slab memory manager: created area 0xffffffff92001000 (10542)
slab memory manager: created area 0xffffffff92801000 (10543)
slab memory manager: created area 0xffffffff93001000 (10544)
slab memory manager: created area 0xffffffff93801000 (10545)
slab memory manager: created area 0xffffffff94001000 (10550)
slab memory manager: created area 0xffffffff94801000 (10551)
slab memory manager: created area 0xffffffff95001000 (10552)

Launching "kernel_debugger" in a terminal window hangs, as well, without entering kernel debugger. This keyboard doesn't have sysreq so I can't enter kernel debugger with ALT-SYSREQ-D.

[jackburton]

I was able to launch two more terminals (I have three opened now), then opening one more terminal failed, and the first terminal started failing to update its window

[jackburton]

Interestingly, this seems to happen only with haikuports repo, as now.

[jackburton]

Replying to jackburton:

Interestingly, this seems to happen only with haikuports repo, as now.

It actually just happened with other repos, so no.

[diver]

Does export DISABLE_ASLR=1 change anything?

[jackburton]

You mean in a terminal, before git commands ? Seems not to make any difference (see attachment)

[jackburton]

Found the problem: it's related to the "virtio" emulated storage. I changed the disk to "SATA" and the problem went away.

[waddlesplash]

Sounds related to #18286. IIRC there was an older bug that mmlr fixed a while back which could also cause this.

[jackburton]

Replying to waddlesplash:

Sounds related to #18286. IIRC there was an older bug that mmlr fixed a while back which could also cause this.

The symptoms described in #18286 are identical to the ones I'm experiencing, so I'd say it's the same problem

[korli]

Proposed change: ​https://review.haiku-os.org/c/haiku/+/7048

[waddlesplash]

Fixed in hrev57330.