linux-kernel - Re: [tip:sched/core] sched: Pull up the might_sleep() check into cond

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Date:	Mon, 20 Jul 2009 13:39:15 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Frederic Weisbecker <fweisbec@...il.com>
Cc:	Li Zefan <lizf@...fujitsu.com>, hpa@...or.com,
	linux-kernel@...r.kernel.org, tglx@...utronix.de, mingo@...e.hu,
	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:sched/core] sched: Pull up the might_sleep() check into
 cond_resched()

On Mon, 2009-07-20 at 04:12 -0400, Frederic Weisbecker wrote:

> Hm, I can read that in fs/dcache.c:512
> 
> /* dentry->d_lock was dropped in prune_one_dentry() */
> cond_resched_lock(&dcache_lock);

dentry->d_lock != dcache_lock

> Isn't it a mususe of cond_resched_lock() ?
> In this case, dcache.c should be fixed.

Both sites look good wrt locking. So there's something else fishy.

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