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authorChristoph Hellwig <hch@infradead.org>2012-04-23 01:58:33 -0400
committerBen Myers <bpm@sgi.com>2012-05-14 17:20:26 -0400
commit1c30462542bac8abffb4823638b6b1659c1cfcf5 (patch)
treeb86f1fc14eb0f41e224833128ecc81163227d044 /fs/xfs/xfs_rtalloc.c
parent32ce90a4b79155a155de2b284d8b69023e5e8fea (diff)
xfs: allow assigning the tail lsn with the AIL lock held
Provide a variant of xlog_assign_tail_lsn that has the AIL lock already held. By doing so we do an additional atomic_read + atomic_set under the lock, which comes down to two instructions. Switch xfs_trans_ail_update_bulk and xfs_trans_ail_delete_bulk to the new version to reduce the number of lock roundtrips, and prepare for a new addition that would require a third lock roundtrip in xfs_trans_ail_delete_bulk. This addition is also the reason for slightly rearranging the conditionals and relying on xfs_log_space_wake for checking that the filesystem has been shut down internally. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Mark Tinguely <tinguely@sgi.com> Signed-off-by: Ben Myers <bpm@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_rtalloc.c')
0 files changed, 0 insertions, 0 deletions