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xfs: add a lock class for group/project dquots
We can have both a user and a group/project dquot locked at the same time, as long as the user dquot is locked first. Tell lockdep about that fact by making the group/project dquots a different lock class. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <david@fromorbit.com>
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1 changed files with 11 additions and 1 deletions
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@ -73,6 +73,8 @@ int xfs_dqreq_num;
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int xfs_dqerror_mod = 33;
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#endif
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static struct lock_class_key xfs_dquot_other_class;
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/*
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* Allocate and initialize a dquot. We don't always allocate fresh memory;
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* we try to reclaim a free dquot if the number of incore dquots are above
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@ -139,7 +141,15 @@ xfs_qm_dqinit(
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ASSERT(dqp->q_trace);
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xfs_dqtrace_entry(dqp, "DQRECLAIMED_INIT");
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#endif
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}
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}
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/*
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* In either case we need to make sure group quotas have a different
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* lock class than user quotas, to make sure lockdep knows we can
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* locks of one of each at the same time.
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*/
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if (!(type & XFS_DQ_USER))
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lockdep_set_class(&dqp->q_qlock, &xfs_dquot_other_class);
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/*
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* log item gets initialized later
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