From: Ingo Oeser <ioe-lkml@rameria.de>
To: Jan Kara <jack@suse.cz>
Cc: LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH REVIEW] udf: Fix lock inversion between iprune_mutex and alloc_mutex (v2)
Date: Mon, 18 Aug 2008 16:34:29 +0200 [thread overview]
Message-ID: <200808181634.29724.ioe-lkml@rameria.de> (raw)
In-Reply-To: <12190639982548-git-send-email-jack@suse.cz>
Hi Jan,
On Monday 18 August 2008, Jan Kara wrote:
> A memory allocation inside alloc_mutex must not recurse back into the
> filesystem itself because that leads to lock inversion between iprune_mutex and
> alloc_mutex (and thus to deadlocks - see traces below). alloc_mutex is actually
> needed only to update allocation statistics in the superblock so we can drop it
> before we start allocating memory for the inode.
On a quick review, this is correct.
Best Regards
Ingo Oeser
prev parent reply other threads:[~2008-08-18 14:43 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-18 12:53 Jan Kara
2008-08-18 12:53 ` [PATCH REVIEW] udf: Fix error paths in udf_new_inode() Jan Kara
2008-08-18 14:34 ` Ingo Oeser [this message]
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