From: Ted Ts'o <tytso@mit.edu>
To: Eric Sandeen <sandeen@redhat.com>
Cc: ext4 development <linux-ext4@vger.kernel.org>,
Mike Snitzer <snitzer@redhat.com>
Subject: Re: [PATCH] mballoc: allocate stripe-multiple IOs on stripe boundaries
Date: Mon, 26 Jul 2010 18:52:23 -0400 [thread overview]
Message-ID: <20100726225223.GB14072@thunk.org> (raw)
In-Reply-To: <4C3E27BF.2000005@redhat.com>
On Wed, Jul 14, 2010 at 04:10:23PM -0500, Eric Sandeen wrote:
> For some reason, today mballoc only allocates IOs which are exactly
> stripe-sized on a stripe boundary. If you have a multiple (say, a
> 128k IO on a 64k stripe) you may end up unaligned.
>
> It seems to me that a simple change to align stripe-multiple IOs
> on stripe boundaries would be a very good idea, unless this breaks
> some other mballoc heuristic for some reason...
I've added this to the ext4 tree, thanks.
- Ted
prev parent reply other threads:[~2010-07-26 22:52 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-14 21:10 [PATCH] mballoc: allocate stripe-multiple IOs on stripe boundaries Eric Sandeen
2010-07-14 21:33 ` Andreas Dilger
2010-07-26 22:52 ` Ted Ts'o [this message]
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