f2fs: let checkpoint flush dnode page of regular
Fsyncer will wait on all dnode pages of regular writeback before flushing,
if there are async dnode pages blocked by IO scheduler, it may decrease
fsync's performance.
In this patch, we choose to let f2fs_balance_fs_bg() to trigger checkpoint
to flush these dnode pages of regular, so async IO of dnode page can be
elimitnated, making fsyncer only need to wait for sync IO.
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 631e153..3662e1f 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -509,7 +509,8 @@ void f2fs_balance_fs_bg(struct f2fs_sb_info *sbi)
else
f2fs_build_free_nids(sbi, false, false);
- if (!is_idle(sbi) && !excess_dirty_nats(sbi))
+ if (!is_idle(sbi) &&
+ (!excess_dirty_nats(sbi) && !excess_dirty_nodes(sbi)))
return;
/* checkpoint is the only way to shrink partial cached entries */
@@ -517,6 +518,7 @@ void f2fs_balance_fs_bg(struct f2fs_sb_info *sbi)
!f2fs_available_free_memory(sbi, INO_ENTRIES) ||
excess_prefree_segs(sbi) ||
excess_dirty_nats(sbi) ||
+ excess_dirty_nodes(sbi) ||
f2fs_time_over(sbi, CP_TIME)) {
if (test_opt(sbi, DATA_FLUSH)) {
struct blk_plug plug;