Re: [PATCH] perf: Fix missing SIGTRAPs due to pending_disable abuse

[Marco Elver]

 On Wed, Sep 28, 2022 at 12:06PM +0200, Marco Elver wrote:

> My second idea about introducing something like irq_work_raw_sync().
> Maybe it's not that crazy if it is actually safe. I expect this case
> where we need the irq_work_raw_sync() to be very very rare.

The previous irq_work_raw_sync() forgot about irq_work_queue_on(). Alas,
I might still be missing something obvious, because "it's never that
easy". ;-)

And for completeness, the full perf patch of what it would look like
together with irq_work_raw_sync() (consider it v1.5). It's already
survived some shorter stress tests and fuzzing.

Thanks,
-- Marco