On Tue, Jul 29, 2014 at 07:39:45PM +0800, Chao Yu wrote: > Hi, > > > -----Original Message----- > > From: Jaegeuk Kim [mailto:jaegeuk@xxxxxxxxxx] > > Sent: Saturday, July 26, 2014 6:47 AM > > To: linux-kernel@xxxxxxxxxxxxxxx; linux-fsdevel@xxxxxxxxxxxxxxx; > > linux-f2fs-devel@xxxxxxxxxxxxxxxxxxxxx > > Cc: Jaegeuk Kim > > Subject: [f2fs-dev] [PATCH 06/11] f2fs: skip unnecessary data writes during fsync > > > > 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 <jaegeuk@xxxxxxxxxx> > > --- > > 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)) > > Should we shift this to is_inode_flag_set(fi, FI_UPDATE_WRITE) || > exist_written_data(sbi, inode->i_ino, UPDATE_INO) ? Hehe, I found that and was going to submit new patch. :) Small changes are not a big deal, so I'll test and then push them into the tree. The for-next tree can be rebased all the time, so if you have any suggestion, let me know. Thanks, > > > + 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 > > _______________________________________________ > > Linux-f2fs-devel mailing list > > Linux-f2fs-devel@xxxxxxxxxxxxxxxxxxxxx > > https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
