Control: severity -1 important
On Mon, 2023-07-24 at 15:40 +0200, Christian Göttsche wrote:
> Package: src:linux
> Version: 6.4.4-1
> Severity: serious
>
> Dear Maintainer,
>
> Kernel 6.4.4 is affected by a regression causing one core be report
> high IO wait utilization.
>
> See https://lore.kernel.org/lkml/12251678.o9o76zd...@natalenko.name/
There is no such thing as a CPU having "high IO wait utilization".
When tasks are in I/O wait state, they are not using a CPU.
Unfortunately, for historical reasons Linux includes such tasks in the
load average and reports a CPU as being in I/O wait state when it's
idle and the last task running on it went into I/O wait state (at least
I think that's what the rule is).
So this bug is about an unwanted change in task/CPU state reporting,
not tasks suddenly using much more CPU time. For that reason, I don't
think it should "serious", i.e. a blocker for testing propagation.
Ben.
--
Ben Hutchings
Never attribute to conspiracy what can adequately be explained
by stupidity.
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