Messages in this thread Patch in this message | | | Date | Wed, 09 Sep 2009 22:51:47 +0800 | From | Wu Fengguang <> | Subject | [RFC][PATCH 6/7] writeback: dont abort inode on congestion |
| |
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 <mbligh@google.com> Cc: Michael Rubin <mrubin@google.com> Cc: Chad Talbott <ctalbott@google.com> Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> --- 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 { --
| |