[Bug 217572] Initial blocked tasks causing deterioration over hours until (nearly) complete system lockup and data loss with PostgreSQL 13

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=217572

Christian Kujau (kernel@nerdbynature.de) changed:

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--- Comment #3 from Christian Kujau (kernel@nerdbynature.de) ---
So, these "blocked for more than" warnings are somewhat documented in
https://www.kernel.org/doc/html/latest/admin-guide/sysctl/kernel.html#hung-task-timeout-secs
and these warnings can be disabled.

These "rcu_preempt self-detected stall on CPU" messages may not be related to
XFS at all, see e.g. https://stackoverflow.com/a/35403677. Maybe the system is
just too busy while doing file system operations, hence "xfs" showing up in
these backtraces.

Does this happen when dumping smaller databases too? Did this happen with
earlier kernels? With newer ones?

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