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Re: [PATCH 2/2] sched/debug: fix deadlock when enabling sched events

From Peter Zijlstra <peterz@infradead.org>
Newsgroups linux.kernel
Subject Re: [PATCH 2/2] sched/debug: fix deadlock when enabling sched events
Date 2016-06-07 22:00 +0200
Message-ID <rHvkl-6Ti-13@gated-at.bofh.it> (permalink)
References <rHvaG-6PS-13@gated-at.bofh.it> <rHvaG-6PS-11@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Tue, Jun 07, 2016 at 02:43:17PM -0500, Josh Poimboeuf wrote:
> 1. Instead of just warning and allowing the tracepoints to be broken,
>    I'd argue that it would be better to make them work by forcing
>    schedstats enabled and printing a warning about that, which is what's

Forcing them enabled doesn't make them useful per se; some of these
tracepoint rely on previously recoded state, which now wasn't previously
recorded because back then it was disabled.

But yes, maybe this is better...

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Thread

[PATCH 2/2] sched/debug: fix deadlock when enabling sched events Josh Poimboeuf <jpoimboe@redhat.com> - 2016-06-07 21:50 +0200
  Re: [PATCH 2/2] sched/debug: fix deadlock when enabling sched events Peter Zijlstra <peterz@infradead.org> - 2016-06-07 22:00 +0200
    Re: [PATCH 2/2] sched/debug: fix deadlock when enabling sched events Josh Poimboeuf <jpoimboe@redhat.com> - 2016-06-07 23:10 +0200
    Re: [PATCH 2/2] sched/debug: fix deadlock when enabling sched events Mel Gorman <mgorman@techsingularity.net> - 2016-06-08 10:20 +0200
  Re: [PATCH 2/2] sched/debug: fix deadlock when enabling sched events Josh Poimboeuf <jpoimboe@redhat.com> - 2016-06-07 23:10 +0200
  Re: [PATCH 2/2] sched/debug: fix deadlock when enabling sched events Ingo Molnar <mingo@kernel.org> - 2016-06-08 10:00 +0200
    Re: [PATCH 2/2] sched/debug: fix deadlock when enabling sched events Josh Poimboeuf <jpoimboe@redhat.com> - 2016-06-08 15:20 +0200
      Re: [PATCH 2/2] sched/debug: fix deadlock when enabling sched events Ingo Molnar <mingo@kernel.org> - 2016-06-08 15:20 +0200
  Re: [PATCH 2/2] sched/debug: fix deadlock when enabling sched events Mel Gorman <mgorman@techsingularity.net> - 2016-06-08 10:20 +0200

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