On Sat, Oct 30, 2021 at 6:30 PM Salvatore Bonaccorso <carnil@xxxxxxxxxx> wrote: > > > I'm retesting https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.14.14/ > > > in earnest. I did get some assertions, but they may have been > > > unrelated. The testing continues... > > > > Thanks for the work on pinpointing it. I'll wait for your conclusion > > then, it'll give us an idea what we should look for. > > Were you able to pinpoint the issue? Retesting on the ubuntu mainline 5.14.14 and 5.14.15 was unable to reproduce the issue in a VM. Using Fedora (34) 5.14.14 and 5.14.15 kernel I am reasonably able to reproduce this, and it is now reported as https://bugzilla.redhat.com/show_bug.cgi?id=2018882. I've so far been unable to reproduce this issue on 5.15.0-rc7 inside a (Ubuntu-21.10) VM. Marko did using a other heavy flushing sysbench script (modified version attached - slightly lower specs, and can be used on distro install) was able to see the fault (qps goes to 0) using Debian sid userspace and 5.15-rc6/5.15-rc7 Ubuntu mainline kernels. https://jira.mariadb.org/browse/MDEV-26674?focusedCommentId=203645&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-203645 Note if using a mariadb-10.6.5 (not quite released), there's a change of defaults to avoid this bug, mtr options --mysqld=--innodb_use_native_aio=1 --nowarnings will test this however.
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