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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/data.c
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@@ -1438,6 +1438,7 @@ static int f2fs_write_data_pages(struct address_space *mapping,
{
struct inode *inode = mapping->host;
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
struct blk_plug plug;
int ret;
/* deal with chardevs and other special file */
@@ -1463,7 +1464,9 @@ static int f2fs_write_data_pages(struct address_space *mapping,
trace_f2fs_writepages(mapping->host, wbc, DATA);
blk_start_plug(&plug);
ret = f2fs_write_cache_pages(mapping, wbc);
blk_finish_plug(&plug);
/*
* if some pages were truncated, we cannot guarantee its mapping->host
* to detect pending bios.