linux-kernel - Re: [PATCH] watchdog: Fix race on single cpu boot

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Message-ID: <20150801162522.GO2859@worktop.programming.kicks-ass.net>
Date:	Sat, 1 Aug 2015 18:25:22 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Ulrich Obergfell <uobergfe@...hat.com>
Cc:	Don Zickus <dzickus@...hat.com>, Jiri Olsa <jolsa@...nel.org>,
	lkml <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...nel.org>, Michal Hocko <mhocko@...e.cz>,
	Stephane Eranian <eranian@...gle.com>,
	Andi Kleen <ak@...ux.intel.com>,
	Paul Bunyan <pbunyan@...hat.com>
Subject: Re: [PATCH] watchdog: Fix race on single cpu boot

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.
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