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Re: [Qemu-devel] Re: [PATCH] Add cache=volatile parameter to -drive

From: Kevin Wolf
Subject: Re: [Qemu-devel] Re: [PATCH] Add cache=volatile parameter to -drive
Date: Wed, 26 May 2010 10:43:57 +0200
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv: Gecko/20100430 Fedora/3.0.4-2.fc12 Thunderbird/3.0.4

Am 26.05.2010 03:31, schrieb Anthony Liguori:
> On 05/25/2010 04:01 PM, Aurelien Jarno wrote:
>> I really think this patch can be useful, in my own case when testing
>> debian-installer (I already cache=writeback). In short all that is about
>> developing and testing, as opposed to run a VM in production, can
>> benefit about that. This was one of the original use case of QEMU before
>> KVM arrived.
>> Unless someone can convince me not to do it, I seriously considering
>> applying this patch.
> There really needs to be an indication in the --help output of what the 
> ramifications of this option are, in the very least.  It should also be 
> removable via a ./configure option because no sane distribution should 
> enable this for end users.

We know better what you stupid user want? There are valid use cases for
this cache option, most notably installation.

I could agree with requesting that the option should be called
cache=unsafe (or even Alex' cache=destroys_your_image), but that should
really be enough to tell everyone that his data is not safe with this


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