From: Christoph Hellwig <hch@infradead.org>
To: Chris Mason <chris.mason@oracle.com>,
jim owens <owens6336@gmail.com>, Josef Bacik <josef@redhat.com>,
linux-btrfs <linux-btrfs@vger.kernel.org>
Subject: Re: [PATCH V2] Btrfs: Full direct I/O and AIO read implementation.
Date: Mon, 15 Feb 2010 16:58:23 -0500 [thread overview]
Message-ID: <20100215215823.GA3763@infradead.org> (raw)
In-Reply-To: <20100215164255.GG11057@think>
On Mon, Feb 15, 2010 at 11:42:55AM -0500, Chris Mason wrote:
> We can record the smallest alignment while scanning the devices and just
> use that. In general 4K is good enough, although some other database
> company might be more worried about smaller numbers.
How is access at 512 byte granularity supposed to work? With 4k logical
sector drives that will require a manual read-modify write cycle in
the direct I/O code, which is counter the intentions.
next prev parent reply other threads:[~2010-02-15 21:58 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-10 18:53 [PATCH V2] Btrfs: Full direct I/O and AIO read implementation jim owens
2010-02-12 19:28 ` Josef Bacik
2010-02-14 1:30 ` jim owens
2010-02-15 16:42 ` Chris Mason
2010-02-15 19:18 ` jim owens
2010-02-16 16:01 ` Chris Mason
2010-02-16 17:09 ` jim owens
2010-02-15 21:58 ` Christoph Hellwig [this message]
2010-02-15 22:26 ` jim owens
2010-02-15 22:32 ` Christoph Hellwig
2010-02-15 22:40 ` jim owens
2010-02-16 15:49 ` Chris Mason
2010-02-15 22:01 ` rk
2010-02-15 22:31 ` jim owens
2010-02-16 19:28 ` jim owens
2010-02-16 19:39 ` Josef Bacik
2010-03-03 18:54 ` jim owens
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