Re: [PATCH] [RFC] rt: kernel/sched/core: fix kthread_park() pending too long when CPU un-plugged
From: Peter Zijlstra <peterz@infradead.org>
Date: 2021-01-08 09:34:02
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On Thu, Jan 07, 2021 at 04:28:43PM +0100, Sebastian Siewior wrote:
This sleep can be triggered by ptrace/strace() and with brief testing I can trigger the sleep there but I don't get it anywhere near where I would notice it with cyclictest.
It's a single task wakeup (the caller), doing that from hardirq context really should not be a problem, we do lots of that in RT already.