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RE: [PATCH] kernel/watchdog: fix spurious hard lockups

From "Liang, Kan" <kan.liang@intel.com>
Newsgroups linux.kernel
Subject RE: [PATCH] kernel/watchdog: fix spurious hard lockups
Date 2017-06-21 14:50 +0200
Message-ID <tUNf4-682-15@gated-at.bofh.it> (permalink)
References <tUz2p-5x0-1@gated-at.bofh.it> <tUzvt-5W2-41@gated-at.bofh.it>
Organization linux.* mail to news gateway

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> >
> > The right fix for mainline can be found here.
> > perf/x86/intel: enable CPU ref_cycles for GP counter perf/x86/intel,
> > watchdog: Switch NMI watchdog to ref cycles on x86
> > https://patchwork.kernel.org/patch/9779087/
> > https://patchwork.kernel.org/patch/9779089/
> 
> Presumably the "right fix" will later be altered to revert this one-line
> workaround?

The "right fix" itself will not touch the watchdog rate. I will modify the
changelog to notify the people who want to do the backport.

As my understanding, it's not harmful even if we don't revert the
workaround. It can still detect the hardlockup, only takes
a tiny bit longer.

Thanks,
Kan

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Thread

[PATCH] kernel/watchdog: fix spurious hard lockups kan.liang@intel.com - 2017-06-20 23:40 +0200
  Re: [PATCH] kernel/watchdog: fix spurious hard lockups Andrew Morton <akpm@linux-foundation.org> - 2017-06-21 00:10 +0200
    RE: [PATCH] kernel/watchdog: fix spurious hard lockups "Liang, Kan" <kan.liang@intel.com> - 2017-06-21 14:50 +0200
      Re: [PATCH] kernel/watchdog: fix spurious hard lockups Don Zickus <dzickus@redhat.com> - 2017-06-21 15:50 +0200
        RE: [PATCH] kernel/watchdog: fix spurious hard lockups "Liang, Kan" <kan.liang@intel.com> - 2017-06-21 16:20 +0200
  Re: [PATCH] kernel/watchdog: fix spurious hard lockups Prarit Bhargava <prarit@redhat.com> - 2017-06-21 00:40 +0200
    Re: [PATCH] kernel/watchdog: fix spurious hard lockups Andi Kleen <ak@linux.intel.com> - 2017-06-21 01:10 +0200
      Re: [PATCH] kernel/watchdog: fix spurious hard lockups Prarit Bhargava <prarit@redhat.com> - 2017-06-21 02:20 +0200
        Re: [PATCH] kernel/watchdog: fix spurious hard lockups Marc Herbert <Marc.Herbert@intel.com> - 2017-06-21 23:10 +0200
  Re: [PATCH] kernel/watchdog: fix spurious hard lockups Don Zickus <dzickus@redhat.com> - 2017-06-21 15:50 +0200
    RE: [PATCH] kernel/watchdog: fix spurious hard lockups "Liang, Kan" <kan.liang@intel.com> - 2017-06-21 16:10 +0200
  Re: [PATCH] kernel/watchdog: fix spurious hard lockups Michal Hocko <mhocko@kernel.org> - 2017-06-28 13:50 +0200
    RE: [PATCH] kernel/watchdog: fix spurious hard lockups "Liang, Kan" <kan.liang@intel.com> - 2017-06-28 15:30 +0200
      RE: [PATCH] kernel/watchdog: fix spurious hard lockups "Liang, Kan" <kan.liang@intel.com> - 2017-06-28 16:40 +0200
      Re: [PATCH] kernel/watchdog: fix spurious hard lockups Michal Hocko <mhocko@kernel.org> - 2017-06-28 16:40 +0200

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