From: Jan Kara Subject: Re: [PATCH 3/4] ext4: avoid calling ext4_mark_inode_dirty() under unneeded semaphores Date: Fri, 20 Jan 2017 14:37:37 +0100 Message-ID: <20170120133737.GA10446@quack2.suse.cz> References: <20170112034938.5934-1-tytso@mit.edu> <20170112034938.5934-5-tytso@mit.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Ext4 Developers List , linux@sciencehorizons.net To: Theodore Ts'o Return-path: Received: from mx2.suse.de ([195.135.220.15]:45998 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752485AbdATNhp (ORCPT ); Fri, 20 Jan 2017 08:37:45 -0500 Content-Disposition: inline In-Reply-To: <20170112034938.5934-5-tytso@mit.edu> Sender: linux-ext4-owner@vger.kernel.org List-ID: On Wed 11-01-17 22:49:37, Ted Tso wrote: > There is no need to call ext4_mark_inode_dirty while holding xattr_sem > or i_data_sem, so where it's easy to avoid it, move it out from the > critical region. > > Signed-off-by: Theodore Ts'o Looks good to me. You can add: Reviewed-by: Jan Kara Honza > --- > fs/ext4/inline.c | 9 +++------ > fs/ext4/inode.c | 2 +- > 2 files changed, 4 insertions(+), 7 deletions(-) > > diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c > index 99a5312ced52..31f98dd04e51 100644 > --- a/fs/ext4/inline.c > +++ b/fs/ext4/inline.c > @@ -1042,7 +1042,6 @@ static int ext4_add_dirent_to_inline(handle_t *handle, > dir->i_mtime = dir->i_ctime = current_time(dir); > ext4_update_dx_flag(dir); > dir->i_version++; > - ext4_mark_inode_dirty(handle, dir); > return 1; > } > > @@ -1311,8 +1310,8 @@ int ext4_try_add_inline_entry(handle_t *handle, struct ext4_filename *fname, > ret = ext4_convert_inline_data_nolock(handle, dir, &iloc); > > out: > - ext4_mark_inode_dirty(handle, dir); > ext4_write_unlock_xattr(dir, &no_expand); > + ext4_mark_inode_dirty(handle, dir); > brelse(iloc.bh); > return ret; > } > @@ -1708,13 +1707,11 @@ int ext4_delete_inline_entry(handle_t *handle, > if (err) > goto out; > > - err = ext4_mark_inode_dirty(handle, dir); > - if (unlikely(err)) > - goto out; > - > ext4_show_inline_dir(dir, iloc.bh, inline_start, inline_size); > out: > ext4_write_unlock_xattr(dir, &no_expand); > + if (likely(err == 0)) > + err = ext4_mark_inode_dirty(handle, dir); > brelse(iloc.bh); > if (err != -ENOENT) > ext4_std_error(dir->i_sb, err); > diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c > index 88d57af1b516..86dde0667ccc 100644 > --- a/fs/ext4/inode.c > +++ b/fs/ext4/inode.c > @@ -2464,8 +2464,8 @@ static int mpage_map_and_submit_extent(handle_t *handle, > disksize = i_size; > if (disksize > EXT4_I(inode)->i_disksize) > EXT4_I(inode)->i_disksize = disksize; > - err2 = ext4_mark_inode_dirty(handle, inode); > up_write(&EXT4_I(inode)->i_data_sem); > + err2 = ext4_mark_inode_dirty(handle, inode); > if (err2) > ext4_error(inode->i_sb, > "Failed to mark inode %lu dirty", > -- > 2.11.0.rc0.7.gbe5a750 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-ext4" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- Jan Kara SUSE Labs, CR