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 <yuch...@huawei.com>
---
v2:
- correct commit message.
 fs/f2fs/segment.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index aabe0d6b8307..5e708debeb9c 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -1723,6 +1723,7 @@ void init_discard_policy(struct discard_policy *dpolicy,
                dpolicy->min_interval = DEF_MIN_DISCARD_ISSUE_TIME;
                dpolicy->max_interval = DEF_MAX_DISCARD_ISSUE_TIME;
                dpolicy->io_aware = true;
+               dpolicy->sync = false;
        } else if (discard_type == DPOLICY_FORCE) {
                dpolicy->min_interval = DEF_MIN_DISCARD_ISSUE_TIME;
                dpolicy->max_interval = DEF_MAX_DISCARD_ISSUE_TIME;
-- 
2.15.0.55.gc2ece9dc4de6

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