Messages in this thread | ![/](/images/icornerl.gif) | | Date | Wed, 10 Apr 2024 16:48:21 +0200 | From | Sebastian Andrzej Siewior <> | Subject | Re: [PATCH v3 2/4] perf: Enqueue SIGTRAP always via task_work. |
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On 2024-04-10 16:42:56 [+0200], Frederic Weisbecker wrote: > > > Like this then? > > > > > > https://lore.kernel.org/all/202403310406.TPrIela8-lkp@intel.com/T/#m63c28147d8ac06b21c64d7784d49f892e06c0e50 > > > > Kind of, yes. Do we have more than one waiter? If not, maybe that > > rcuwait would work then. > > Indeed there is only one waiter so that should work. Would > that be something you can call while preemption is disabled?
rcuwait_wake_up() does only wake_up_process() which is fine. wake_up() does spin_lock_irqsave() which is a no.
On the other hand that preempt-disable needs to go anyway due to perf_sigtrap(). But a slim wake is a slim wake ;)
> Thanks.
Sebastian
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