Re: [PATCH V2] jffs2: Fix lock acquisition order bug in gc path

From: Artem Bityutskiy
Date: Fri Apr 13 2012 - 11:11:01 EST


On Thu, 2012-03-29 at 19:34 -0400, Josh Cartwright 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:

I've added the follwing:

This was introduce in '81cfc9f jffs2: Fix serious write stall due to
erase'.

Cc: stable@xxxxxxxxxx [2.6.37+]

and pushed to l2-mtd.git, thanks! CC-in Joakim to let him know that his
patch has a bug and that he might want this fix in his system(s) as
well.

--
Best Regards,
Artem Bityutskiy

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