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Groups > linux.kernel > #1418509
| From | Arnaldo Carvalho de Melo <acme@kernel.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH 2/2] perf stat: Remove nmi watchdog check code again |
| Date | 2016-06-09 19:30 +0200 |
| Message-ID | <rIbWh-10d-1@gated-at.bofh.it> (permalink) |
| References | <rI82q-6RA-5@gated-at.bofh.it> <rI82r-6RA-9@gated-at.bofh.it> <rI8vn-72W-13@gated-at.bofh.it> <rI9Uu-86C-13@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
Em Thu, Jun 09, 2016 at 08:17:16AM -0700, Andi Kleen escreveu: > On Thu, Jun 09, 2016 at 10:42:08AM -0300, Arnaldo Carvalho de Melo wrote: > > Em Thu, Jun 09, 2016 at 06:14:39AM -0700, Andi Kleen escreveu: > > > Now that the NMI watchdog runs with reference cycles, and does not > > Now as in when? We should at least warn the user that the kernel used is > > one where the NMI watchdog will not get in the way of topdown. Is there > > a programmatic way to discover that? > If the other patch gets merged at the same time as the TopDown patches > it's only a few days in tip which don't support it, no released kernel. > So no need to check for this case. Ok, I see, since on older kernels it will fail before that point, when not finding the topdown counters, no problem, super small window, thanks for clarifying. - Arnaldo
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[PATCH 1/2] Switch NMI watchdog to ref cycles on x86 Andi Kleen <andi@firstfloor.org> - 2016-06-09 15:20 +0200
[PATCH 2/2] perf stat: Remove nmi watchdog check code again Andi Kleen <andi@firstfloor.org> - 2016-06-09 15:20 +0200
Re: [PATCH 2/2] perf stat: Remove nmi watchdog check code again Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-06-09 15:50 +0200
Re: [PATCH 2/2] perf stat: Remove nmi watchdog check code again Andi Kleen <andi@firstfloor.org> - 2016-06-09 17:20 +0200
Re: [PATCH 2/2] perf stat: Remove nmi watchdog check code again Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-06-09 19:30 +0200
Re: [PATCH 2/2] perf stat: Remove nmi watchdog check code again Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-06-10 21:10 +0200
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