f2fs: fix to avoid long latency during umount

In umount, we give an constand time to handle pending discard, previously,
in __issue_discard_cmd() we missed to check timeout condition in loop,
result in delaying long time, fix it.

Signed-off-by: Heng Xiao <heng.xiao@unisoc.com>
[Chao Yu: add commit message]
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 478284d..2d1d7ba 100644 (file)
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -1497,6 +1497,10 @@ static int __issue_discard_cmd(struct f2fs_sb_info *sbi,
                list_for_each_entry_safe(dc, tmp, pend_list, list) {
                        f2fs_bug_on(sbi, dc->state != D_PREP);
 
+                       if (dpolicy->timeout != 0 &&
+                               f2fs_time_over(sbi, dpolicy->timeout))
+                               break;
+
                        if (dpolicy->io_aware && i < dpolicy->io_aware_gran &&
                                                !is_idle(sbi, DISCARD_TIME)) {
                                io_interrupted = true;