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f2fs: use blk_plug in all the possible paths

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This patch reverts 19a5f5e2ef (f2fs: drop any block plugging),
and adds blk_plug in write paths additionally.

The main reason is that blk_start_plug can be used to wake up from low-power
mode before submitting further bios.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim
2016-07-13 19:33:19 -07:00
parent 82e0a5aa5d
commit 9dfa1baff7
6 changed files with 29 additions and 2 deletions
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3
fs/f2fs/node.c
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@@ -1618,6 +1618,7 @@ static int f2fs_write_node_pages(struct address_space *mapping,
struct writeback_control *wbc)
{
struct f2fs_sb_info *sbi = F2FS_M_SB(mapping);
struct blk_plug plug;
long diff;
/* balancing f2fs's metadata in background */
@@ -1631,7 +1632,9 @@ static int f2fs_write_node_pages(struct address_space *mapping,
diff = nr_pages_to_write(sbi, NODE, wbc);
wbc->sync_mode = WB_SYNC_NONE;
blk_start_plug(&plug);
sync_node_pages(sbi, wbc);
blk_finish_plug(&plug);
wbc->nr_to_write = max((long)0, wbc->nr_to_write - diff);
return 0;