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authorWanpeng Li <liwanp@linux.vnet.ibm.com>2013-07-09 03:00:14 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2013-07-09 21:33:22 +0400
commit25d130ba22362757a90135fd8a0f75cc7fc71e79 (patch)
tree6d88bac53aaeba9c957a92a6df0e894c185f421c /fs
parent6ce1bc86ae8b8f74095f2694732ccbab2f3849e5 (diff)
downloadlinux-25d130ba22362757a90135fd8a0f75cc7fc71e79.tar.xz
mm/writeback: don't check force_wait to handle bdi->work_list
After commit 839a8e8660b6 ("writeback: replace custom worker pool implementation with unbound workqueue"), bdi_writeback_workfn runs off bdi_writeback->dwork, on each execution, it processes bdi->work_list and reschedules if there are more things to do instead of flush any work that race with us existing. It is unecessary to check force_wait in wb_do_writeback since it is always 0 after the mentioned commit. This patch remove the force_wait in wb_do_writeback. Signed-off-by: Wanpeng Li <liwanp@linux.vnet.ibm.com> Reviewed-by: Tejun Heo <tj@kernel.org> Reviewed-by: Fengguang Wu <fengguang.wu@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs')
-rw-r--r--fs/fs-writeback.c10
1 files changed, 2 insertions, 8 deletions
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index aca8835c8c17..68851ff2fd41 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -963,7 +963,7 @@ static long wb_check_old_data_flush(struct bdi_writeback *wb)
/*
* Retrieve work items and do the writeback they describe
*/
-static long wb_do_writeback(struct bdi_writeback *wb, int force_wait)
+static long wb_do_writeback(struct bdi_writeback *wb)
{
struct backing_dev_info *bdi = wb->bdi;
struct wb_writeback_work *work;
@@ -971,12 +971,6 @@ static long wb_do_writeback(struct bdi_writeback *wb, int force_wait)
set_bit(BDI_writeback_running, &wb->bdi->state);
while ((work = get_next_work_item(bdi)) != NULL) {
- /*
- * Override sync mode, in case we must wait for completion
- * because this thread is exiting now.
- */
- if (force_wait)
- work->sync_mode = WB_SYNC_ALL;
trace_writeback_exec(bdi, work);
@@ -1025,7 +1019,7 @@ void bdi_writeback_workfn(struct work_struct *work)
* rescuer as work_list needs to be drained.
*/
do {
- pages_written = wb_do_writeback(wb, 0);
+ pages_written = wb_do_writeback(wb);
trace_writeback_pages_written(pages_written);
} while (!list_empty(&bdi->work_list));
} else {