linux-kernel - Re: [PATCH] jffs2: Fix lock acquisition order bug in gc path

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Message-ID: <20120329232929.GA21848@joshcartwright.net>
Date:	Thu, 29 Mar 2012 19:29:29 -0400
From:	Josh Cartwright <joshc@...ux.com>
To:	Brian Norris <computersforpeace@...il.com>
Cc:	David Woodhouse <dwmw2@...radead.org>,
	linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Artem Bityutskiy <dedekind1@...il.com>
Subject: Re: [PATCH] jffs2: Fix lock acquisition order bug in gc path

On Thu, Mar 29, 2012 at 08:38:41AM -0700, Brian Norris wrote:
> On Thu, Feb 9, 2012 at 10:50 AM, Josh Cartwright <joshc@...ux.com> wrote:
> > The locking policy is such that the erase_complete_block spinlock is
> > nested within the alloc_sem mutex.  This fixes a case in which the
> > acquisition order was erroneously reversed.  This issue was caught by
> > the following lockdep splat:
> 
> (Bump.) Anybody interested in this patch? It seemed sane to me, and I
> had it sitting in my inbox. It does need a trivial rebase, BTW.

I'm certainly still interested in it, for what its worth :).  We've had
no problems here for the month and a half its been in our tree.

I'll send out a rebased V2.

Thanks!

-- 
                                            joshc

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