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Re: [PATCH 1/3] perf/x86/intel: output LBR support statement after validation

From Andi Kleen <ak@linux.intel.com>
Newsgroups linux.kernel
Subject Re: [PATCH 1/3] perf/x86/intel: output LBR support statement after validation
Date 2016-06-08 11:10 +0200
Message-ID <rHHER-6Fd-23@gated-at.bofh.it> (permalink)
References (1 earlier) <rFqRP-8y-11@gated-at.bofh.it> <rFDm1-82K-9@gated-at.bofh.it> <rFEBs-wH-27@gated-at.bofh.it> <rGRZD-67c-7@gated-at.bofh.it> <rHG67-5xf-63@gated-at.bofh.it>
Organization linux.* mail to news gateway

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> Ok, so you're saying that syscall and int are not causing LBR callstack to
> record an entry. If that is the case, then a rfi should not cause a pop of the
> last LBR entry. Is that right?

rfi = ?

But likely yes. There shouldn't be any ring 0 branches in the callstack LBR,
as long as the patch forcing it to ring 3 is still there.

-Andi

-- 
ak@linux.intel.com -- Speaking for myself only

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[PATCH 1/3] perf/x86/intel: output LBR support statement after validation David Carrillo-Cisneros <davidcc@google.com> - 2016-06-02 04:50 +0200
  Re: [PATCH 1/3] perf/x86/intel: output LBR support statement after  validation Peter Zijlstra <peterz@infradead.org> - 2016-06-02 10:30 +0200
  Re: [PATCH 1/3] perf/x86/intel: output LBR support statement after  validation Andi Kleen <ak@linux.intel.com> - 2016-06-02 18:10 +0200
    Re: [PATCH 1/3] perf/x86/intel: output LBR support statement after validation Stephane Eranian <eranian@google.com> - 2016-06-02 19:30 +0200
      Re: [PATCH 1/3] perf/x86/intel: output LBR support statement after  validation Andi Kleen <ak@linux.intel.com> - 2016-06-06 04:00 +0200
        Re: [PATCH 1/3] perf/x86/intel: output LBR support statement after validation Stephane Eranian <eranian@google.com> - 2016-06-08 09:30 +0200
          Re: [PATCH 1/3] perf/x86/intel: output LBR support statement after  validation Andi Kleen <ak@linux.intel.com> - 2016-06-08 11:10 +0200

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