[Ocfs2-devel] lockdep warning in ocfs2 quota

[Joel Becker <Joel.Becker@oracle.com>]

On Tue, Mar 30, 2010 at 06:36:57PM +0200, Jan Kara wrote:
>   This is the culprit - we have to do some writes when reading dquot (to
> increase dquot use count and possibly also allocate space for further
> writes) but ocfs2_local_read_dquot is already called with dqio_mutex
> held so when ocfs2_global_read_dquot tries to start a transaction it
> is a violation of lock ordering.
>   I guess I'll have to move all the code from ocfs2_local_read_dquot
> to ocfs2_acquire_dquot and do all the handling there with proper locking.
> I'll have a look at it.

	Thanks for taking a look.  Better we find the inversion sooner!

Joel

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Joel Becker
Principal Software Developer
Oracle
E-mail: joel.becker at oracle.com
Phone: (650) 506-8127