On Sunday, April 5, 2020 12:44:38 PM CEST Ankur Sinha wrote:
> On Sat, Apr 04, 2020 21:37:05 -0000, Artem Tim wrote:
> > https://bugzilla.redhat.com/show_bug.cgi?id=1754807
> 
> That does look like it. I'll go through the comments and see if I can
> help with more info.

Note also this bug [1] where's kernel traceback in bfq kernel code.
I have never reproduced the problem on my box (ssd nvme disk), so I can't
tell.. but those are possible workarounds for those who use bfq scheduler:

- per Zbyszek, switching back to deadline
- per Vitaly, systemd.unified_cgroup_hierarchy=0 kernel parameter

[1] https://bugzilla.redhat.com/show_bug.cgi?id=1767097

Pavel


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