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Re: [PATCH] soft lockup: kill realtime threads before panic

From	Jörn Engel <joern@purestorage.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH] soft lockup: kill realtime threads before panic
Date	2015-07-22 18:40 +0200
Message-ID	<pP5dM-3UB-7@gated-at.bofh.it> (permalink)
References	(1 earlier) <pOTYZ-4EJ-1@gated-at.bofh.it> <pOUBI-5Dv-17@gated-at.bofh.it> <pOV4J-6b6-5@gated-at.bofh.it> <pOVR8-7jR-3@gated-at.bofh.it> <pOWNc-d3-25@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Wed, Jul 22, 2015 at 09:35:28AM +0200, Mike Galbraith wrote:
> On Tue, 2015-07-21 at 23:33 -0700, Jörn Engel wrote:
> 
> > One could argue that killing the realtime thread is even better than
> > panic, as things can restart with a blank slate even faster.  But the
> > real benefit is that we get better debug data for the failing component.
> > If we had a kernel bug, the backtrace would usually be sufficient to
> > point fingers.  With a bonkers realtime thread, not so much.
> 
> If userspace wants a watchdog, it should train a userspace dog, not turn
> the kernel watchdog into a userspace attack dog.

Fair point.  Let's drop this patch then.

Jörn

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Money can buy bandwidth, but latency is forever.
-- John R. Mashey
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Re: [PATCH] soft lockup: kill realtime threads before panic Jörn Engel <joern@purestorage.com> - 2015-07-22 07:20 +0200
  Re: [PATCH] soft lockup: kill realtime threads before panic Mike Galbraith <umgwanakikbuti@gmail.com> - 2015-07-22 07:50 +0200
    Re: [PATCH] soft lockup: kill realtime threads before panic Jörn Engel <joern@purestorage.com> - 2015-07-22 08:40 +0200
      Re: [PATCH] soft lockup: kill realtime threads before panic Mike Galbraith <umgwanakikbuti@gmail.com> - 2015-07-22 09:40 +0200
        Re: [PATCH] soft lockup: kill realtime threads before panic Don Zickus <dzickus@redhat.com> - 2015-07-22 16:00 +0200
        Re: [PATCH] soft lockup: kill realtime threads before panic Jörn Engel <joern@purestorage.com> - 2015-07-22 18:40 +0200

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