I use lxc-4.0.12 on Gentoo, built with io-uring support
(--enable-liburing), targeting liburing-2.1. My kernel config is a very
lightly modified version of Fedora's generic kernel config. After moving
from the 5.16.x series to the 5.17.x kernel series, I started noticed
frequent hangs in lxc-stop. It doesn't happen 100% of the time, but
definitely more than 50% of the time. Bisecting narrowed down the issue
to commit aa43477b040251f451db0d844073ac00a8ab66ee: io_uring: poll
rework. Testing indicates the problem is still present in 5.18-rc5.
Unfortunately I do not have the expertise with the codebases of either
lxc or io-uring to try to debug the problem further on my own, but I can
easily apply patches to any of the involved components (lxc, liburing,
kernel) and rebuild for testing or validation. I am also happy to
provide any further information that would be helpful with reproducing
or debugging the problem.
Regards,
Daniel Harding
#regzbot introduced: aa43477b040251f451db0d844073ac00a8ab66ee
