linux-kernel - Re: [tip:core/ipi] generic-ipi: eliminate spurious pointlessWARN

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Message-Id: <1237630806.24626.104.camel@twins>
Date:	Sat, 21 Mar 2009 11:20:06 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	Ingo Molnar <mingo@...e.hu>, Jan Beulich <jbeulich@...ell.com>,
	tglx@...utronix.de, mingo@...hat.com, hpa@...or.com,
	linux-kernel@...r.kernel.org
Subject: Re: [tip:core/ipi] generic-ipi: eliminate spurious
 pointlessWARN_ON()s

On Fri, 2009-03-20 at 16:40 -0700, Eric W. Biederman wrote:
> It doesn't look like read==2 works properly because it does not log any
> locks grabbed underneath the reader lock.  Is that deliberate?  It certainly
> does not seem to be correct.

You're right, it doesn't work correctly. One of the patches in that heap
I pointed you at tries to fix it, but gets it wrong.
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