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From: | Anthony Liguori |
Subject: | Re: [Qemu-devel] [PATCH] QEMU: change default disk cache behavior |
Date: | Thu, 20 May 2010 13:58:58 -0500 |
User-agent: | Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.5) Gecko/20091209 Fedora/3.0-4.fc12 Lightning/1.0pre Thunderbird/3.0 |
On 05/20/2010 08:49 AM, Jes Sorensen wrote:
On 05/20/10 15:40, Anthony Liguori wrote:On 05/20/2010 08:36 AM, Jes Sorensen wrote:And I strongly suspect that such a blanket change would be wrong but that a more targeted change like making cache=none default for physical devices would satisfy mostly everyone.Is there any other thing than physical devices attached to the -drive parameter?Image files which are the overwhelming more common use-case.For image files we certainly want it too, at least for proper ones (ie. raw).
What makes you say that?
It could be that it causes problems for qcow2.
It's definitely the wrong thing for qcow2 with backing files. Regards, Anthony Liguori
I'll try and look at it when I am back. Cheers, Jes
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