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Date: Thu, 28 Jul 2011 14:29:20 +0200
From: Kevin Wolf <kwolf@redhat.com>
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Subject: Re: [Qemu-devel] Block layer roadmap
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To: Christoph Hellwig <hch@lst.de>
Cc: devin122@gmail.com, Stefan Hajnoczi <stefanha@gmail.com>, Jagane Sundar <jagane@sundar.org>, Dor Laor <dlaor@redhat.com>, qemu-devel <qemu-devel@nongnu.org>, Markus Armbruster <armbru@redhat.com>, Feiran Zheng <famcool@gmail.com>, Frediano Ziglio <freddy77@gmail.com>, Jes Sorensen <Jes.Sorensen@redhat.com>, Paolo Bonzini <pbonzini@redhat.com>

Am 28.07.2011 14:08, schrieb Christoph Hellwig:
> On Thu, Jul 28, 2011 at 12:05:43PM +0200, Kevin Wolf wrote:
>> Another item that just came up on IRC again: Allow guests to toggle WCE,
>> so that we finally can get rid of the cache=writethrough default. We
>> should definitely get this done before 1.0.
> 
> Guest toggling is nice and cool, but the real feature is to allow it on
> the command line.  As mentioned about 10 times before guests generally don't
> fiddle with it without the administrator triggering it manually.  So
> specifying it in the qemu config is the much better interface for 95% of
> the use cases.

I don't really care about guest toggling. I care about the default cache
mode, and Anthony said that he doesn't agree with changing it unless
guests can toggle it.

Kevin