linux-kernel - [PATCH] f2fs: remove redundant block plug

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Message-ID: <20180404093513.86775-1-yuchao0@huawei.com>
Date:   Wed, 4 Apr 2018 17:35:13 +0800
From:   Chao Yu <yuchao0@...wei.com>
To:     <jaegeuk@...nel.org>
CC:     <linux-f2fs-devel@...ts.sourceforge.net>,
        <linux-kernel@...r.kernel.org>, <chao@...nel.org>,
        Chao Yu <yuchao0@...wei.com>
Subject: [PATCH] f2fs: remove redundant block plug

For buffered IO, we don't need to use block plug to cache bio,
for direct IO, generic f2fs_direct_IO has already added block
plug, so let's remove redundant one in .write_iter.

Signed-off-by: Chao Yu <yuchao0@...wei.com>
---
 fs/f2fs/file.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index fa8f7cf1498f..5ecf1e355a97 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -2943,9 +2943,8 @@ static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
 			inode_unlock(inode);
 			return err;
 		}
-		blk_start_plug(&plug);
+
 		ret = __generic_file_write_iter(iocb, from);
-		blk_finish_plug(&plug);
 		clear_inode_flag(inode, FI_NO_PREALLOC);
 
 		if (ret > 0)
-- 
2.15.0.55.gc2ece9dc4de6