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f2fs: turn down IO priority of discard from background 

In order to avoid interfering normal r/w IO, let's turn down IO
priority of discard issued from background.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2018-04-10 15:43:09 +08:00 committed by Jaegeuk Kim
parent 377224c471
commit cba608493d
1 changed files with 1 additions and 0 deletions
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fs/f2fs/segment.c
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@ -931,6 +931,7 @@ static void __init_discard_policy(struct f2fs_sb_info *sbi,
dpolicy->min_interval = DEF_MIN_DISCARD_ISSUE_TIME;
dpolicy->max_interval = DEF_MAX_DISCARD_ISSUE_TIME;
dpolicy->io_aware = true;
dpolicy->sync = false;
if (utilization(sbi) > DEF_DISCARD_URGENT_UTIL) {
dpolicy->granularity = 1;
dpolicy->max_interval = DEF_MIN_DISCARD_ISSUE_TIME;