From 3013683253ad04f67d8cfaa25be708353686b90a Mon Sep 17 00:00:00 2001 From: Dave Chinner Date: Mon, 20 Dec 2010 12:03:17 +1100 Subject: xfs: remove all the inodes on a buffer from the AIL in bulk When inode buffer IO completes, usually all of the inodes are removed from the AIL. This involves processing them one at a time and taking the AIL lock once for every inode. When all CPUs are processing inode IO completions, this causes excessive amount sof contention on the AIL lock. Instead, change the way we process inode IO completion in the buffer IO done callback. Allow the inode IO done callback to walk the list of IO done callbacks and pull all the inodes off the buffer in one go and then process them as a batch. Once all the inodes for removal are collected, take the AIL lock once and do a bulk removal operation to minimise traffic on the AIL lock. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig --- fs/xfs/xfs_trans_priv.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'fs/xfs/xfs_trans_priv.h') diff --git a/fs/xfs/xfs_trans_priv.h b/fs/xfs/xfs_trans_priv.h index e039729186e9..246ca4dcb5c4 100644 --- a/fs/xfs/xfs_trans_priv.h +++ b/fs/xfs/xfs_trans_priv.h @@ -85,6 +85,10 @@ void xfs_trans_ail_update_bulk(struct xfs_ail *ailp, void xfs_trans_ail_delete(struct xfs_ail *ailp, struct xfs_log_item *lip) __releases(ailp->xa_lock); +void xfs_trans_ail_delete_bulk(struct xfs_ail *ailp, + struct xfs_log_item **log_items, + int nr_items) + __releases(ailp->xa_lock); void xfs_trans_ail_push(struct xfs_ail *, xfs_lsn_t); void xfs_trans_unlocked_item(struct xfs_ail *, xfs_log_item_t *); -- cgit v1.2.2