From d47b439f03076113b6e6e43b3328fadac1bf9080 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 e8d4158a32065..0f0187804eda2 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; } -- 2.39.5