From: Christoph Hellwig <hch@lst.de>
To: Al Viro <viro@ZenIV.linux.org.uk>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
Jens Axboe <jaxboe@fusionio.com>, Christoph Hellwig <hch@lst.de>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [GIT PULL] one writeback regression fix for .36
Date: Wed, 6 Oct 2010 20:43:53 +0200 [thread overview]
Message-ID: <20101006184353.GA30673@lst.de> (raw)
In-Reply-To: <20101006183124.GR19804@ZenIV.linux.org.uk>
On Wed, Oct 06, 2010 at 07:31:24PM +0100, Al Viro wrote:
> Eh... I'm no fonder of that than you are (and strcmp is fucking stupid),
> but... that thing is really sb_is_blkdev_sb() trying to make a comeback
> in fs/fs-writeback.c. IOW, it's sick, but not for the reasons you are
> mentioning; strcmp() use is trivially removable.
The alternative basically is exporting bd_type so that it can be used
here and comparing ->s_type. The real problem is that right now the
internal block device filesystem is the only one having more than one
backing device per filesystem. I have patches to generalize that, which
is something we'll need for writeback performance on large filesystem
sooner or later. I was planning to get this ready for 2.6.37, but if
you prefer no big chance in this area I can calm down and move other
things up on my TODO list.
next prev parent reply other threads:[~2010-10-06 18:44 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-06 16:54 [GIT PULL] one writeback regression fix for .36 Jens Axboe
2010-10-06 18:17 ` Linus Torvalds
2010-10-06 18:31 ` Al Viro
2010-10-06 18:43 ` Christoph Hellwig [this message]
2010-10-06 18:38 ` Jens Axboe
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