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authorChristoph Hellwig <hch@infradead.org>2012-02-20 06:31:20 +0400
committerBen Myers <bpm@sgi.com>2012-02-23 08:17:00 +0400
commit09a423a3d6c70905f1090f01aadb8e6abff527ce (patch)
tree7bbe94301c348add4bb9e11b253b3f9617ef3573 /fs/xfs/xfs_log.h
parent70b5437653d9c6c8de287affd38836cce98ebde5 (diff)
downloadlinux-09a423a3d6c70905f1090f01aadb8e6abff527ce.tar.xz
xfs: split tail_lsn assignments from log space wakeups
Currently xfs_log_move_tail has a tail_lsn argument that is horribly overloaded: it may contain either an actual lsn to assign to the log tail, 0 as a special case to use the last sync LSN, or 1 to indicate that no tail LSN assignment should be performed, and we should opportunisticly wake up at one task waiting for log space even if we did not move the LSN. Remove the tail lsn assigned from xfs_log_move_tail and make the two callers use xlog_assign_tail_lsn instead of the current variant of partially using the code in xfs_log_move_tail and partially opencoding it. Note that means we grow an addition lock roundtrip on the AIL lock for each bulk update or delete, which is still far less than what we had before introducing the bulk operations. If this proves to be a problem we can still add a variant of xlog_assign_tail_lsn that expects the lock to be held already. Also rename the remainder of xfs_log_move_tail to xfs_log_space_wake as that name describes its functionality much better. Reviewed-by: Mark Tinguely <tinguely@sgi.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Ben Myers <bpm@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_log.h')
-rw-r--r--fs/xfs/xfs_log.h5
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/xfs/xfs_log.h b/fs/xfs/xfs_log.h
index 2aee3b22d29c..58d858074e6b 100644
--- a/fs/xfs/xfs_log.h
+++ b/fs/xfs/xfs_log.h
@@ -160,8 +160,9 @@ int xfs_log_mount(struct xfs_mount *mp,
xfs_daddr_t start_block,
int num_bblocks);
int xfs_log_mount_finish(struct xfs_mount *mp);
-void xfs_log_move_tail(struct xfs_mount *mp,
- xfs_lsn_t tail_lsn);
+xfs_lsn_t xlog_assign_tail_lsn(struct xfs_mount *mp);
+void xfs_log_space_wake(struct xfs_mount *mp,
+ bool opportunistic);
int xfs_log_notify(struct xfs_mount *mp,
struct xlog_in_core *iclog,
xfs_log_callback_t *callback_entry);