Re: [PATCH 00/12] perf: more fixes

From	Borislav Petkov <bp@alien8.de>
Newsgroups	linux.kernel
Subject	Re: [PATCH 00/12] perf: more fixes
Date	2016-03-11 16:50 +0100
Message-ID	<rbxub-8i6-33@gated-at.bofh.it> (permalink)
References	<r5LTc-7ZZ-11@gated-at.bofh.it> <rb9US-8dN-17@gated-at.bofh.it> <rba4y-8hd-13@gated-at.bofh.it> <rbweJ-7tE-1@gated-at.bofh.it>
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On Fri, Mar 11, 2016 at 03:23:46PM +0100, Peter Zijlstra wrote:
> The below seems to fix the IBS issue tickled by syz-kaller on my
> machine. I've not yet ran perf-fuzzer, which seems able to tickle a
> different set of bugs.
> 
> ---
> Subject: perf, amb: Fix IBS throttle

		 amd

but you know already.

> 
> When the IBS IRQ handler get a !0 return from perf_event_overflow;
> meaning it should throttle the event, it only disables it, it doesn't
> call perf_ibs_stop().
> 
> This confuses the state machine, as we'll use pmu::start() ->
> perf_ibs_start() to unthrottle.
> 
> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>

Tested-by: Borislav Petkov <bp@suse.de>

I'll leave it running for an additional hour but if I haven't said
anything until then, all is good.

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.

Thread

Re: [PATCH 00/12] perf: more fixes Peter Zijlstra <peterz@infradead.org> - 2016-03-10 15:40 +0100
  Re: [PATCH 00/12] perf: more fixes Vince Weaver <vince@deater.net> - 2016-03-10 15:50 +0100
    Re: [PATCH 00/12] perf: more fixes Peter Zijlstra <peterz@infradead.org> - 2016-03-11 15:30 +0100
      Re: [PATCH 00/12] perf: more fixes Borislav Petkov <bp@alien8.de> - 2016-03-11 16:50 +0100
    Re: [PATCH 00/12] perf: more fixes Peter Zijlstra <peterz@infradead.org> - 2016-03-15 16:50 +0100
      Re: [PATCH 00/12] perf: more fixes Peter Zijlstra <peterz@infradead.org> - 2016-03-17 00:10 +0100
        Re: [PATCH 00/12] perf: more fixes Peter Zijlstra <peterz@infradead.org> - 2016-03-17 00:20 +0100
        Re: [PATCH 00/12] perf: more fixes Borislav Petkov <bp@alien8.de> - 2016-03-17 13:00 +0100
  Re: [PATCH 00/12] perf: more fixes Alexander Shishkin <alexander.shishkin@linux.intel.com> - 2016-03-11 11:20 +0100

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