| Date | Wed, 07 Oct 2009 15:38:58 +0800 | From | Wu Fengguang <> | Subject | [PATCH 40/45] writeback: requeue_io_wait() on I_SYNC locked inode |
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Use requeue_io_wait() if inode is being synced by others. This queue won't be busy retried, so avoids busy loops.
Cc: Jan Kara <jack@suse.cz> Cc: Michael Rubin <mrubin@google.com> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Fengguang Wu <wfg@mail.ustc.edu.cn> --- fs/fs-writeback.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
--- linux.orig/fs/fs-writeback.c 2009-10-07 14:32:51.000000000 +0800 +++ linux/fs/fs-writeback.c 2009-10-07 14:32:52.000000000 +0800 @@ -526,14 +526,14 @@ writeback_single_inode(struct inode *ino if (inode->i_state & I_SYNC) { /* * If this inode is locked for writeback and we are not doing - * writeback-for-data-integrity, move it to b_more_io so that - * writeback can proceed with the other inodes on s_io. + * writeback-for-data-integrity, move it to b_more_io_wait so + * that writeback can proceed with the other inodes on b_io. * * We'll have another go at writing back this inode when we * completed a full scan of b_io. */ if (!wait) { - requeue_io(inode); + requeue_io_wait(inode); return 0; }
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