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Message-ID: <1342002259.18274.8.camel@sauron.fi.intel.com>
Date: Wed, 11 Jul 2012 13:24:19 +0300
From: Artem Bityutskiy <dedekind1@...il.com>
To: Jan Kara <jack@...e.cz>
Cc: Theodore Tso <tytso@....edu>,
Linux FS Maling List <linux-fsdevel@...r.kernel.org>,
Linux Kernel Maling List <linux-kernel@...r.kernel.org>,
Ext4 Mailing List <linux-ext4@...r.kernel.org>
Subject: Re: [PATCHv6 3/5] ext4: remove unnecessary superblock dirtying
On Wed, 2012-07-11 at 12:11 +0200, Jan Kara wrote:
> > > So case 2.b is a bit controversial, but I think it is acceptable. After all, by
> > > enabling checksumming we already sign up for paying the price of calculating
> > > it. The way to improve checksumming performance globally would be to calculate
> > > it just before sending buffers to the I/O queue. We'd need some kind of
> > > call-back which could be registered by file-systems.
> Actually, the most common case of adding orphan inode used
> ext4_handle_dirty_super_now() so for that case there is no difference. And
> other cases are so rare it really does not matter... So there shouldn't be
> any measurable difference.
Thank you, I'll take a closer look and possibly change the commit
message.
--
Best Regards,
Artem Bityutskiy
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