On Wed, Aug 10, 2022 at 02:42:40PM -0400, Chris Murphy wrote: > > > On Wed, Aug 10, 2022, at 2:33 PM, Chris Murphy wrote: > > On Wed, Aug 10, 2022, at 1:48 PM, Josef Bacik wrote: > > > >> To help narrow this down can you disable any IO controller you've got enabled > >> and see if you can reproduce? If you can sysrq+w is super helpful as it'll > >> point us in the next direction to look. Thanks, > > > > I'm not following, sorry. I can boot with > > systemd.unified_cgroup_hierarchy=0 to make sure it's all off, but we're > > not using an IO cgroup controllers specifically as far as I'm aware. > > OK yeah that won't work because the workload requires cgroup2 or it won't run. > Oh no I don't want cgroups completley off, just disable the io controller, so figure out which cgroup your thing is being run in, and then echo "-io" > <parent dir>/cgroup.subtree_control If you cat /sys/fs/cgroup/whatever/cgroup/cgroup.controllers and you see "io" in there keep doing the above in the next highest parent directory until io is no longer in there. Thanks, Josef
