From: Wu Fengguang <fengguang.wu@intel.com>
To: Christoph Hellwig <hch@lst.de>
Cc: Matthew Wilcox <willy@linux.intel.com>,
Jens Axboe <jaxboe@fusionio.com>,
Al Viro <viro@zeniv.linux.org.uk>,
linux-kernel@vger.kernel.org,
Shane Michael Matthews <shane.matthews@intel.com>,
Jeff Moyer <jmoyer@redhat.com>, Jens Axboe <axboe@kernel.dk>,
"Luck, Tony" <tony.luck@intel.com>,
Florian Mickler <florian@mickler.org>
Subject: Re: [PATCH] Add readpages support for block devices
Date: Sun, 19 Dec 2010 11:35:52 +0800 [thread overview]
Message-ID: <20101219033552.GA9247@localhost> (raw)
In-Reply-To: <20101218092049.GA32442@lst.de>
On Sat, Dec 18, 2010 at 10:20:49AM +0100, Christoph Hellwig wrote:
> We already used to have this and Jens reverted it in commit
> 172124e220f1854acc99ee394671781b8b5e2120. I can't find a better
> explanation than his rather brief commit message, but he might not more.
The discussion goes here
http://www.gossamer-threads.com/lists/linux/kernel/1085325?do=post_view_threaded#1085325
The problem happens on ext3 fs, non-4k aligned partition and 64K page
size. Jeff also find it hurts dump performance. Then it's reverted
since no one seems to have the time to dig further.
Thanks,
Fengguang
prev parent reply other threads:[~2010-12-19 3:35 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-18 0:27 [PATCH] Add readpages support for block devices Matthew Wilcox
2010-12-18 9:20 ` Christoph Hellwig
2010-12-19 3:35 ` Wu Fengguang [this message]
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