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authorJens Axboe <axboe@fb.com>2016-09-01 19:20:33 +0300
committerJens Axboe <axboe@fb.com>2016-11-08 18:28:55 +0300
commitb57d74aff9ab92fbfb7c197c384d1adfa2827b2e (patch)
treeecb36de5f34865613c9eec3db3c0de034aaf7e33 /mm/page-writeback.c
parent8e1de26cd5db192b52819f5ee97bab308964f3ab (diff)
downloadlinux-b57d74aff9ab92fbfb7c197c384d1adfa2827b2e.tar.xz
writeback: track if we're sleeping on progress in balance_dirty_pages()
Note in the bdi_writeback structure whenever a task ends up sleeping waiting for progress. We can use that information in the lower layers to increase the priority of writes. Signed-off-by: Jens Axboe <axboe@fb.com> Reviewed-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'mm/page-writeback.c')
-rw-r--r--mm/page-writeback.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 439cc63ad903..52e2f8e3b472 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -1778,6 +1778,7 @@ pause:
pause,
start_time);
__set_current_state(TASK_KILLABLE);
+ wb->dirty_sleep = now;
io_schedule_timeout(pause);
current->dirty_paused_when = now + pause;