System freeze after suspending two instances of Neovim about libuv HOT 5 CLOSED

axboe/liburing#1113 contains a kernel patch that fixes this issue and updates for when it'll be available so I'm happy to close this issue.
Thank you for your help!

from libuv.

Thanks for the report. It sounds like you're hitting a kernel bug, it almost has to be. Does setting UV_USE_IO_URING=0 in the environment fix the freeze?

edit: you mentioned this:

Cannot reproduce on Arch Linux with io_uring disabled.

But I assume that means the kernel is compiled without io_uring support?

from libuv.

Setting UV_USE_IO_URING=0 in the environment fixes the freeze
Previously testing was done with sysctl kernel.io_uring_disabled=1 (which also fixes the freeze)

from libuv.

Right, that's what I expected. Your best bet is to report it to [email protected] or maybe over at https://github.com/axboe/liburing/issues (IIRC Jens accepted bug reports there in the past but I'm not 100% sure.)

I had a quick look at git log io_uring/ and fs/eventpoll.c in the kernel repo but nothing immediately stood out. FWIW, the last update to io_uring/epoll.[ch] was me undeprecating it back in May last year so whatever the cause, it's probably not directly io_uring+epoll-related.

I can blacklist affected kernels in libuv but I'd have to know the affected range, and since you're testing against v6.9-rc1, it's probably still unfixed.

from libuv.

Thank you! I'll try the GitHub page first

from libuv.