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>

diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 3db035b..bef74d6 100644 (file)
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -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;