Messages in this thread | | | Date | Mon, 2 May 2022 16:17:30 +0300 | From | Daniel Harding <> | Subject | [REGRESSION] lxc-stop hang on 5.17.x kernels |
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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
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