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SubjectRe: [RFC][PATCH] cpu/hotplug: wait for cpuset_hotplug_work to finish on cpu online
Date
Peter Zijlstra <peterz@infradead.org> writes:
>> The nature of this bug is also described here (with different consequences):
>> https://lore.kernel.org/lkml/20200211141554.24181-1-qais.yousef@arm.com/
>
> Yeah, pesky deadlocks.. someone was going to try again.

I dug up the synchronous patch

https://lore.kernel.org/lkml/1579878449-10164-1-git-send-email-prsood@codeaurora.org/

but surprisingly wasn't able to reproduce the lockdep splat from

https://lore.kernel.org/lkml/F0388D99-84D7-453B-9B6B-EEFF0E7BE4CC@lca.pw/

even though I could hit it a few weeks ago. I'm going to try to mess
with it later, but don't let me hold this up.

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