diff options
| author | Jan Kara <jack@suse.cz> | 2022-06-23 20:51:45 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-07-25 03:39:31 +0300 |
| commit | e92eebbb09218e128e559cf12b65317721309324 (patch) | |
| tree | 5202cd32a11a8b33712991a268ae4882cfcab9a7 /mm/page-writeback.c | |
| parent | ea6813be07dcdc072aa9ad18099115a74cecb5e1 (diff) | |
| download | linux-e92eebbb09218e128e559cf12b65317721309324.tar.xz | |
mm: Move updates of dirty_exceeded into one place
Transition of wb->dirty_exceeded from 0 to 1 happens before we go to
sleep in balance_dirty_pages() while transition from 1 to 0 happens when
exiting from balance_dirty_pages(), possibly based on old values. This
does not make a lot of sense since wb->dirty_exceeded should simply
reflect whether wb is over dirty limit and so we should ratelimit
entering to balance_dirty_pages() less. Move the two updates together.
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Stefan Roesch <shr@fb.com>
Link: https://lore.kernel.org/r/20220623175157.1715274-3-shr@fb.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'mm/page-writeback.c')
| -rw-r--r-- | mm/page-writeback.c | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/mm/page-writeback.c b/mm/page-writeback.c index e59c523aed1a..90b1998c16a1 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -1729,8 +1729,8 @@ free_running: sdtc = mdtc; } - if (dirty_exceeded && !wb->dirty_exceeded) - wb->dirty_exceeded = 1; + if (dirty_exceeded != wb->dirty_exceeded) + wb->dirty_exceeded = dirty_exceeded; if (time_is_before_jiffies(READ_ONCE(wb->bw_time_stamp) + BANDWIDTH_INTERVAL)) @@ -1834,9 +1834,6 @@ pause: if (fatal_signal_pending(current)) break; } - - if (!dirty_exceeded && wb->dirty_exceeded) - wb->dirty_exceeded = 0; } static DEFINE_PER_CPU(int, bdp_ratelimits); |