From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jaegeuk Kim Subject: [PATCH 06/11] f2fs: skip unnecessary data writes during fsync Date: Fri, 25 Jul 2014 15:47:20 -0700 Message-ID: <1406328445-63707-6-git-send-email-jaegeuk@kernel.org> References: <1406328445-63707-1-git-send-email-jaegeuk@kernel.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: Jaegeuk Kim To: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net Return-path: In-Reply-To: <1406328445-63707-1-git-send-email-jaegeuk@kernel.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net List-Id: linux-fsdevel.vger.kernel.org This patch intends to improve the fsync performance by skipping remaining the recovery information, only when there is no data that we should recover. Signed-off-by: Jaegeuk Kim --- fs/f2fs/file.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index 7c652b3..121689a 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -133,6 +133,17 @@ int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) return ret; } + /* + * if there is no written data, don't waste time to write recovery info. + */ + if (!is_inode_flag_set(fi, FI_APPEND_WRITE) && + !exist_written_data(sbi, inode->i_ino, APPEND_INO)) { + if (is_inode_flag_set(fi, FI_UPDATE_WRITE) && + exist_written_data(sbi, inode->i_ino, UPDATE_INO)) + goto flush_out; + goto out; + } + /* guarantee free sections for fsync */ f2fs_balance_fs(sbi); @@ -188,6 +199,11 @@ int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) ret = wait_on_node_pages_writeback(sbi, inode->i_ino); if (ret) goto out; + + /* once recovery info is written, don't need to tack this */ + remove_dirty_inode(sbi, inode->i_ino, APPEND_INO); +flush_out: + remove_dirty_inode(sbi, inode->i_ino, UPDATE_INO); ret = f2fs_issue_flush(F2FS_SB(inode->i_sb)); } out: -- 1.8.5.2 (Apple Git-48) ------------------------------------------------------------------------------ Want fast and easy access to all the code in your enterprise? Index and search up to 200,000 lines of code with a free copy of Black Duck Code Sight - the same software that powers the world's largest code search on Ohloh, the Black Duck Open Hub! Try it now. http://p.sf.net/sfu/bds