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f2fs: use writepages->lock for WB_SYNC_ALL

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If there are many writepages calls by multiple threads in background, we don't
need to serialize to merge all the bios, since it's background.
In such the case, it'd better to run writepages concurrently.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2016-01-20 23:46:05 +08:00
parent b483fadf7e
commit 25c1355151
1 changed files with 1 additions and 1 deletions
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2
fs/f2fs/data.c
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@ -1402,7 +1402,7 @@ static int f2fs_write_data_pages(struct address_space *mapping,
diff = nr_pages_to_write(sbi, DATA, wbc);
if (!S_ISDIR(inode->i_mode)) {
if (!S_ISDIR(inode->i_mode) && wbc->sync_mode == WB_SYNC_ALL) {
mutex_lock(&sbi->writepages);
locked = true;
}