Partial system hang when compiling cross-compiler

[accessays]

Setup: hrev56792 in KVM, 2GB RAM, 8 cores, 10GB storage. I ran pkgman update, restarted, cloned repos and started building

git clone --depth 1 http://github.com/haiku/buildtools.git
git clone http://github.com/haiku/haiku.git
cd haiku
mkdir generated.x86_64; cd generated.x86_64
../configure --cross-tools-source ../../buildtools --build-cross-tools x86_64

After some time, the system hangs in a strange way. UI sometimes keeps working (time changes, ActivityMonitor keeps updating), but I cannot start most apps. I can ssh into the system, ls, but not mkdir.

Checking via KDL, mkdir is waiting for a mutex "bfs journal", which is held by "bfs log flusher", which is waiting for cvar for some object (I/O request finished).

From the backtrace, it looks like things break somewhere after virtio_block_write, so I'm assuming a driver issue? But perhaps something else.

[X512]

Does it hang permanently or resume working after waiting for some time?

[accessays]

Replying to X512:

Does it hang permanently or resume working after waiting for some time?

I waited for about 30 mins, no change.

[korli]

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

[waddlesplash]

Fixed in hrev57330.