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| author | Wanpeng Li <liwanp@linux.vnet.ibm.com> | 2013-07-09 03:00:14 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-07-09 21:33:22 +0400 |
| commit | 25d130ba22362757a90135fd8a0f75cc7fc71e79 (patch) | |
| tree | 6d88bac53aaeba9c957a92a6df0e894c185f421c /fs | |
| parent | 6ce1bc86ae8b8f74095f2694732ccbab2f3849e5 (diff) | |
| download | linux-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.c | 10 |
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 { |