Bug#996951: linux-image-5.14.0-3-amd64: iouring looses requests
retested 5.14.14. Sorry not fixed there yet. Guess this is going upstream.
few other fixes to try:
https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git/log/?h=io_uring-5.15
$ uname -a
Linux impish 5.14.14-051414-generic #202110201037 SMP Wed Oct 20
11:04:11 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
dan@impish:/usr/share/mysql/mysql-test$ ./mtr --vardir=/tmp/var
--parallel=4 stress.ddl_innodb stress.ddl_innodb stress.ddl_innodb
stress.ddl_innodb
Logging: ./mtr --vardir=/tmp/var --parallel=4 stress.ddl_innodb
stress.ddl_innodb stress.ddl_innodb stress.ddl_innodb
vardir: /tmp/var
Removing old var directory...
Creating var directory '/tmp/var'...
Checking supported features...
MariaDB Version 10.6.5-MariaDB-1:10.6.5+maria~impish
- SSL connections supported
- binaries built with wsrep patch
Collecting tests...
Installing system database...
==============================================================================
TEST WORKER RESULT TIME (ms) or COMMENT
--------------------------------------------------------------------------
worker[1] Using MTR_BUILD_THREAD 300, with reserved ports 16000..16019
worker[4] Using MTR_BUILD_THREAD 301, with reserved ports 16020..16039
worker[3] Using MTR_BUILD_THREAD 302, with reserved ports 16040..16059
worker[2] Using MTR_BUILD_THREAD 303, with reserved ports 16060..16079
stress.ddl_innodb 'innodb' w4 [ pass ] 235134
stress.ddl_innodb 'innodb' w1 [ pass ] 245906
stress.ddl_innodb 'innodb' w3 [ pass ] 301078
stress.ddl_innodb 'innodb' w2 [ fail ]
Test ended at 2021-10-21 11:23:30
......
Version: '10.6.5-MariaDB-1:10.6.5+maria~impish-log' socket:
'/tmp/var/tmp/2/mysqld.1.sock' port: 16060 mariadb.org binary
distribution
2021-10-21 11:09:42 0 [Note] InnoDB: Buffer pool(s) load completed at
211021 11:09:42
2021-10-21 11:23:27 0 [ERROR] [FATAL] InnoDB:
innodb_fatal_semaphore_wait_threshold was exceeded for dict_sys.latch.
Please refer to
https://mariadb.com/kb/en/how-to-produce-a-full-stack-trace-for-mysqld/
211021 11:23:27 [ERROR] mysqld got signal 6 ;
On Thu, Oct 21, 2021 at 10:10 PM Diederik de Haas <didi.debian@cknow.org> wrote:
>
> On Thursday, 21 October 2021 12:41:34 CEST Salvatore Bonaccorso wrote:
> > On Thu, Oct 21, 2021 at 09:38:00AM +0000, Daniel Black wrote:
> > > Package: src:linux
> > > Version: 5.14.12-1
> > > The good news is I've validated that the linux mainline 5.14.14 build
> > > from https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.14.14/ has
> > > actually fixed this problem.
> >
> > Where you able to isolate the upstream change landed upstream which
> > fixes the issue?
>
> There has been 1 change in fs/io_uring.c that is part of 5.14.14 (and 5.14.13),
> but not 5.14.12 and that is this commit:
> e798dcd960a3f0d40302a1bbf7f755879195a163 "io_uring: kill fasync"
>
> Possibly the simplest way to verify whether it's indeed that commit that fixes
> the issue is to apply the patch to Debian's 5.14.12 kernel.
> Instructions here (also follow 4.2.1):
> https://kernel-team.pages.debian.net/kernel-handbook/ch-common-tasks.html#s4.2.2
>
> This would narrow it down to this specific commit and would also rule out
> differences in Ubuntu's kernel config and Debian's.
>
> Cheers,
> Diederik
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