linux-kernel - Re: [RFC v7] wait: prevent exclusive waiter starvation

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Date:	Mon, 02 Feb 2009 10:47:47 -0500
From:	Chris Mason <chris.mason@...cle.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Oleg Nesterov <oleg@...hat.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Matthew Wilcox <matthew@....cx>,
	Chuck Lever <cel@...i.umich.edu>,
	Nick Piggin <nickpiggin@...oo.com.au>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Ingo Molnar <mingo@...e.hu>, stable@...nel.org
Subject: Re: [RFC v7] wait: prevent exclusive waiter starvation

On Thu, 2009-01-29 at 09:34 -0500, Chris Mason wrote:

> > > > So I think we're saying that
> > > > lock_page_killable-avoid-lost-wakeups.patch actually did fix the bug?
> > > 
> > > I think yes,
> > > 
> 
> Our test case that was able to reliably trigger the bug was fixed by
> lock_page_killable-avoid-lost-wakeups.patch.
> 
> I'll ask them to test v7 as well.  The run takes about a day, so
> confirmation will take a bit.

v7 went through a total of 5 runs and passed all of them.  Unpatched we
would fail after one run, so I think this does fix it.

-chris




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