From: Paul Brook <paul@codesourcery.com>
To: qemu-devel@nongnu.org
Cc: Ryan Harper <ryanh@us.ibm.com>,
Anthony Liguori <aliguori@us.ibm.com>,
kvm@vger.kernel.org
Subject: Re: [Qemu-devel] [PATCH 4/4] Reallocate dma buffers in read/write path if needed
Date: Sat, 4 Oct 2008 00:17:08 +0100 [thread overview]
Message-ID: <200810040017.09081.paul@codesourcery.com> (raw)
In-Reply-To: <1223071531-31817-5-git-send-email-ryanh@us.ibm.com>
On Friday 03 October 2008, Ryan Harper wrote:
> The default buffer size breaks up larger read/write requests unnecessarily.
> When we encounter requests larger than the default dma buffer, reallocate
> the buffer to support the request.
Allocating unboundedly large host buffers based on guest input seems like a
bad idea.
Paul
next prev parent reply other threads:[~2008-10-03 23:17 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-03 22:05 [PATCH 0/4] Improve emulated scsi write performance Ryan Harper
2008-10-03 22:05 ` [PATCH 1/4] lsi_queue_command: add dma direction parameter Ryan Harper
2008-10-03 22:05 ` [PATCH 2/4] Refactor lsi_do_command to queue read and write ops Ryan Harper
2008-10-03 22:05 ` [PATCH 3/4] Refactor scsi-disk layer for queue'ing writes Ryan Harper
2008-10-03 22:05 ` [PATCH 4/4] Reallocate dma buffers in read/write path if needed Ryan Harper
2008-10-03 23:17 ` Paul Brook [this message]
2008-10-03 23:35 ` [Qemu-devel] " Anthony Liguori
2008-10-04 0:00 ` Paul Brook
2008-10-04 10:00 ` Avi Kivity
[not found] ` <20081004135749.pphehrhuw9w4gwsc@imap.linux.ibm.com>
2008-10-04 21:47 ` [Qemu-devel] " Ryan Harper
2008-10-04 22:22 ` Anthony Liguori
2008-10-05 5:23 ` Avi Kivity
2008-10-05 23:06 ` Ryan Harper
2008-10-06 7:27 ` Avi Kivity
2008-10-04 23:00 ` Paul Brook
2008-10-05 5:29 ` Avi Kivity
2008-10-05 23:08 ` [Qemu-devel] [PATCH 0/4] Improve emulated scsi write performance Ryan Harper
2008-10-13 16:15 ` Ryan Harper
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