From 25c13551519c66453737e038d104058f94b2e70a Mon Sep 17 00:00:00 2001 From: Jaegeuk Kim Date: Wed, 20 Jan 2016 23:46:05 +0800 Subject: [PATCH] f2fs: use writepages->lock for WB_SYNC_ALL 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 --- fs/f2fs/data.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index e8d4158a3206..0f0187804eda 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -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; } -- 2.20.1