linux-kernel - Re: [tip:core/locking] mutex: Fix optimistic spinning vs. BKL

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Message-ID: <alpine.LFD.2.00.1005180925180.4195@i5.linux-foundation.org>
Date:	Tue, 18 May 2010 09:26:03 -0700 (PDT)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Ingo Molnar <mingo@...e.hu>
cc:	mingo@...hat.com, hpa@...or.com, linux-kernel@...r.kernel.org,
	a.p.zijlstra@...llo.nl, benh@...nel.crashing.org,
	stable@...nel.org, tglx@...utronix.de, tony@...eyournoodle.com,
	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:core/locking] mutex: Fix optimistic spinning vs. BKL



On Tue, 18 May 2010, Ingo Molnar wrote:
>
> Tony, mind sending a version of this patch that does not 
> include a jiffies based spinning loop?

I think it should just be the two-liner

	if (current->lock_depth >= 0)
		break;

in that loop. Plus comment.

		Linus
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