linux-kernel - Re: [PATCHv3 3/4] ext4: remove unnecessary superblock dirtying

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Message-ID: <1341404740.2979.91.camel@sauron.fi.intel.com>
Date:	Wed, 04 Jul 2012 15:25:40 +0300
From:	Artem Bityutskiy <dedekind1@...il.com>
To:	Jan Kara <jack@...e.cz>
Cc:	Theodore Tso <tytso@....edu>,
	Linux Kernel Maling List <linux-kernel@...r.kernel.org>,
	Ext4 Mailing List <linux-ext4@...r.kernel.org>,
	Linux FS Maling List <linux-fsdevel@...r.kernel.org>
Subject: Re: [PATCHv3 3/4] ext4: remove unnecessary superblock dirtying

On Tue, 2012-07-03 at 14:48 +0200, Jan Kara wrote:
> > 1. When creating the first large file on a file
> >    system without EXT4_FEATURE_RO_COMPAT_LARGE_FILE feature.
> > 2. When re-sizing the file-system
> > 3. When creating an xattr on a file-system without the
> >    EXT4_FEATURE_COMPAT_EXT_ATTR feature.
>   Since this was written, we seem to have grown a use of
> ext4_handle_dirty_super() in fs/ext4/namei.c when adding inode to orphan
> list.

Re-worked the commit message a bit in v4.

> > +		err = ext4_commit_super(sb, 0);
>   When you look at the whole __ext4_handle_dirty_super() function now, it
> doesn't make much sense like this. When now == 1, we mark superblock buffer
> as dirty, when now == 0, we set wtime, kbytes_written, free blocks and
> inodes in the superblock buffer and then mark it dirty. Looking into all
> the places calling this, I'd just drop the 'now' argument and make
> everything behave as in now == 1 case.

Done in v4 in patch N5. Thanks a lot for suggestions and the help!

-- 
Best Regards,
Artem Bityutskiy

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