diff options
| author | Chao Yu <chao2.yu@samsung.com> | 2014-02-28 10:12:05 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2014-02-28 13:09:08 +0900 |
| commit | 9cf3c3898a274ca637b88ad01b0830550ee2d318 (patch) | |
| tree | b0cdb47c4dde8ed7a3e5463e0bc3e8bc10979355 /security | |
| parent | 695fd1ed3bcaae9fc032cbe47f0fe9a934bf1717 (diff) | |
f2fs: fix dirty page accounting when redirty
We should de-account dirty counters for page when redirty in ->writepage().
Wu Fengguang described in 'commit 971767caf632190f77a40b4011c19948232eed75':
"writeback: fix dirtied pages accounting on redirty
De-account the accumulative dirty counters on page redirty.
Page redirties (very common in ext4) will introduce mismatch between
counters (a) and (b)
a) NR_DIRTIED, BDI_DIRTIED, tsk->nr_dirtied
b) NR_WRITTEN, BDI_WRITTEN
This will introduce systematic errors in balanced_rate and result in
dirty page position errors (ie. the dirty pages are no longer balanced
around the global/bdi setpoints)."
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Diffstat (limited to 'security')
0 files changed, 0 insertions, 0 deletions