Bug#1093243: Upgrade to 6.1.123 kernel causes mariadb hangs

From	Salvatore Bonaccorso <carnil@debian.org>
Newsgroups	linux.debian.bugs.dist, linux.kernel, linux.debian.kernel
Subject	Bug#1093243: Upgrade to 6.1.123 kernel causes mariadb hangs
Date	2025-01-23 22:00 +0100
Message-ID	<K8csV-bjBX-1@gated-at.bofh.it> (permalink)
References	<K5F85-9qPe-3@gated-at.bofh.it> <K8c9z-bjhm-3@gated-at.bofh.it> <K5F85-9qPe-3@gated-at.bofh.it> <K8c9z-bjhm-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Cross-posted to 3 groups.

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Hi Xan,

On Thu, Jan 23, 2025 at 02:31:34PM -0600, Xan Charbonnet wrote:
> I rented a Linode and have been trying to load it down with sysbench
> activity while doing a mariabackup and a mysqldump, also while spinning up
> the CPU with zstd benchmarks.  So far I've had no luck triggering the fault.
> 
> I've also been doing some kernel compilation.  I followed this guide:
> https://www.dwarmstrong.org/kernel/
> (except that I used make -j24 to build in parallel and used make
> localmodconfig to compile only the modules I need)
> 
> I've built the following kernels:
> 6.1.123 (equivalent to linux-image-6.1.0-29-amd64)
> 6.1.122
> 6.1.121
> 6.1.120
> 
> So far they have all exhibited the behavior.  Next up is 6.1.119 which is
> equivalent to linux-image-6.1.0-28-amd64.  My expectation is that the fault
> will not appear for this kernel.
> 
> It looks like the issue is here somewhere:
> https://www.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.120
> 
> I have to work on some other things, and it'll take a while to prove the
> negative (that is, to know that the failure isn't happening).  I'll post
> back with the 6.1.119 results when I have them.

Additionally please try with 6.1.120 and revert this commit 

3ab9326f93ec ("io_uring: wake up optimisations")

(which landed in 6.1.120).

If that solves the problem maybe we miss some prequisites in the 6.1.y
series here?

Regards,
Salvatore

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Bug#1093243: Upgrade to 6.1.123 kernel causes mariadb hangs Salvatore Bonaccorso <carnil@debian.org> - 2025-01-23 22:00 +0100
  Bug#1093243: Upgrade to 6.1.123 kernel causes mariadb hangs Xan Charbonnet <xan@charbonnet.com> - 2025-01-24 03:20 +0100
  Bug#1093243: Upgrade to 6.1.123 kernel causes mariadb hangs Xan Charbonnet <xan@charbonnet.com> - 2025-01-27 17:50 +0100

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