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

[Christoph Hellwig]

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.