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Date: Sat, 1 Aug 2015 18:25:22 +0200
From: Peter Zijlstra <peterz@infradead.org>
To: Ulrich Obergfell <uobergfe@redhat.com>
Cc: Don Zickus <dzickus@redhat.com>, Jiri Olsa <jolsa@kernel.org>,
        lkml <linux-kernel@vger.kernel.org>, Ingo Molnar <mingo@kernel.org>,
        Michal Hocko <mhocko@suse.cz>, Stephane Eranian <eranian@google.com>,
        Andi Kleen <ak@linux.intel.com>, Paul Bunyan <pbunyan@redhat.com>
Subject: Re: [PATCH] watchdog: Fix race on single cpu boot
Message-ID: <20150801162522.GO2859@worktop.programming.kicks-ass.net>
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On Sat, Aug 01, 2015 at 09:05:52AM -0400, Ulrich Obergfell wrote:
> 
> Don,
> 
> > Uli privately has been working on a patchset that cleans up a bunch of these
> > race conditions.  We believe it should cover this case.  It uses the
> > proc_mutex to synchronize everything.
> >
> > I think he is reaching out to you.  If you could try his patchset to see if
> > it fixes things, it might be a cleaner approach than what you are doing.
> >
> > <small time goes by>
> >
> > Ok, I was poked on IRC and you have already done this and it passed your
> > testcase.  Let me get Uli to post his patches. :-)
> >
> > Cheers,
> > Don
> 
> I posted the patch set here:
> 
>   https://lkml.org/lkml/2015/8/1/64
>   https://lkml.org/lkml/2015/8/1/65
>   https://lkml.org/lkml/2015/8/1/66
>   https://lkml.org/lkml/2015/8/1/67
>   https://lkml.org/lkml/2015/8/1/68

If only you didn't use lkml.org links, that site is flaky beyond
unusable.

Please use lkml.kernel.org/r/$msgid, that way people actually have a
chance of getting a working link and/or finding it in their local
archive.