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authorChristoph Hellwig <hch@infradead.org>2011-12-06 21:58:19 +0000
committerBen Myers <bpm@sgi.com>2011-12-14 21:15:42 -0600
commitbf72de3194e73fa210a904b0bd951135286bb385 (patch)
tree408ead179da91befd82e0cc23ed66830ead2fa59 /samples/hw_breakpoint
parent92678554abfc2a2f2727ad168da87d8d434ac904 (diff)
xfs: nest qm_dqfrlist_lock inside the dquot qlock
Allow xfs_qm_dqput to work without trylock loops by nesting the freelist lock inside the dquot qlock. In turn that requires trylocks in the reclaim path instead, but given it's a classic tradeoff between fast and slow path, and we follow the model of the inode and dentry caches. Document our new lock order now that it has settled. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Ben Myers <bpm@sgi.com>
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