[Qemu-devel] Re: Write cache enable from guest at runtime

[Stefan Hajnoczi]

On Mon, Mar 14, 2011 at 5:16 PM, Christoph Hellwig <address@hidden> wrote:
> On Mon, Mar 14, 2011 at 05:07:57PM +0000, Stefan Hajnoczi wrote:
>> Hi Christoph,
>> I have written up thoughts on write cache enable, including a
>> workaround to change O_SYNC on a file without kernel changes:
>>
>> http://wiki.qemu.org/Features/WriteCacheEnable
>>
>> Guest ability to control write cache enable is useful and I'd like to
>> see it in QEMU soon.  Any thoughts about what I've posted?  Care to
>> submit your patches?
>
> I have patches using Prerna's close and reopen method almost ready for 
> posting.
> Still fighting a bit with the new virtio code to wire it up.
>
> Unlike your variant I actually added a generic change config request type,
> which allows to re-use it for other runtime controllable features later.

Sounds like a good idea.  Feel free to post the patches RFC and I or
someone else can debug and polish them if you don't have time.

Stefan