Retry writeback of the current inode when encountered congestion, instead of redirting it, which may have the problems - slow down writeback pace - lead to small writeback io Cc: Martin Bligh Cc: Michael Rubin Cc: Chad Talbott Signed-off-by: Wu Fengguang --- fs/fs-writeback.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) --- linux.orig/fs/fs-writeback.c 2009-09-09 21:55:19.000000000 +0800 +++ linux/fs/fs-writeback.c 2009-09-09 22:04:23.000000000 +0800 @@ -460,9 +460,11 @@ writeback_single_inode(struct inode *ino * sometimes bales out without doing anything. */ inode->i_state |= I_DIRTY_PAGES; - if (wbc->nr_to_write <= 0) { + if (wbc->encountered_congestion || + wbc->nr_to_write <= 0) { /* - * slice used up: queue for next turn + * if slice used up, queue for next round; + * otherwise continue this inode after return */ requeue_partial_io(wbc, inode); } else { -- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/