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From: Steven Rostedt <rostedt@goodmis.org>
To: Ingo Molnar <mingo@elte.hu>
Cc: Andrew Morton <akpm@osdl.org>, linux-kernel@vger.kernel.org
Subject: Re: [patch, validator] fix proc_subdir_lock related deadlock
Date: Wed, 25 Jan 2006 12:14:43 -0500	[thread overview]
Message-ID: <1138209283.6695.55.camel@localhost.localdomain> (raw)
In-Reply-To: <20060125170331.GA29339@elte.hu>

On Wed, 2006-01-25 at 18:03 +0100, Ingo Molnar wrote:
> proc_subdir_lock can also be used from softirq (tasklet) context, which 
> may lead to deadlocks.
> 
> This bug was found via the lock validator:
> 

Thanks Ingo,

I stressed in sending the patch that there was a big assumption that the
calls would not be done in (soft)irq context.  I just didn't want to add
overhead if it wasn't needed.  But I guess that this is needed until we
can remove all the instances that use it in softirq context. But that's
for a later patch.

Acked-by: Steven Rostedt <rostedt@goodmis.org>

-- Steve



  reply	other threads:[~2006-01-25 17:15 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-01-25 17:03 [patch, validator] fix proc_subdir_lock related deadlock Ingo Molnar
2006-01-25 17:14 ` Steven Rostedt [this message]
2006-01-25 18:08   ` Ingo Molnar
2006-01-25 18:14     ` [patch, validator] fix files_lock " Ingo Molnar
2006-01-25 18:23     ` [patch, validator] fix proc_subdir_lock " Andrew Morton
2006-01-25 20:21       ` Ingo Molnar
2006-01-26  0:02       ` [patch, lock validator] fix proc_inum_lock " Ingo Molnar
2006-01-26  0:11         ` Ingo Molnar

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