Messages in this thread | | | Date | Fri, 22 May 2015 06:29:47 -0700 | Subject | Re: [PATCH 02/10] perf/x86: Improve HT workaround GP counter constraint | From | Stephane Eranian <> |
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On Fri, May 22, 2015 at 6:25 AM, Peter Zijlstra <peterz@infradead.org> wrote: > On Fri, May 22, 2015 at 06:07:00AM -0700, Stephane Eranian wrote: >> >> One other thing I noticed is that the --n_excl needs to be protected by the >> excl_cntrs->lock in put_excl_constraints(). > > Nah, its strictly per cpu.
No. the excl_cntrs struct is pointed to by cpuc but it is shared between the sibling HT. Otherwise this would not work!
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