Messages in this thread | | | Date | Sat, 30 Apr 2016 00:11:45 +0200 (CEST) | From | Jiri Kosina <> | Subject | Re: [RFC PATCH v2 05/18] sched: add task flag for preempt IRQ tracking |
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On Fri, 29 Apr 2016, Andy Lutomirski wrote:
> > NMI, MCE and interrupts aren't a problem because they have dedicated > > stacks, which are easy to detect. If the tasks' stack is on an > > exception stack or an irq stack, we consider it unreliable. > > Only on x86_64.
Well, MCEs are more or less x86-specific as well. But otherwise good point, thanks Andy.
So, how does stack layout generally look like in case when NMI is actually running on proper kernel stack? I thought it's guaranteed to contain pt_regs anyway in all cases. Is that not guaranteed to be the case?
Thanks,
-- Jiri Kosina SUSE Labs
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