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SubjectRe: [BUG RT] dump-capture kernel not executed for panic in interrupt context
On Fri, Aug 21, 2020 at 05:03:34PM -0400, Steven Rostedt wrote:

> > Sigh. Is it too hard to make mutex_trylock() usable from interrupt
> > context?
>
>
> That's a question for Thomas and Peter Z.

You should really know that too, the TL;DR answer is it's fundamentally
buggered, can't work.

The problem is that RT relies on being able to PI boost the mutex owner.

ISTR we had a thread about all this last year or so, let me see if I can
find that.

Here goes:

https://lkml.kernel.org/r/20191218135047.GS2844@hirez.programming.kicks-ass.net

Kexec even gets mentioned:

https://lkml.kernel.org/r/20191219090535.GV2844@hirez.programming.kicks-ass.net


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