Re: [Qemu-devel] [PATCH] QEMU: change default disk cache behavior

[Anthony Liguori]

On 05/20/2010 08:36 AM, Jes Sorensen wrote:
> On 05/20/10 14:30, Anthony Liguori wrote:
>    
> > On 05/20/2010 04:32 AM, address@hidden wrote:
> >      
> > > Therefore, here is a patch that does two things:
> > >    - default to "nocache"
> > >    - in case of failure with nocache, retry with "write-back"
> > >
> > >        
> > This sort of change requires performance data in a variety of
> > circumstances to justify.
> >
> > 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.

Regards,

Anthony Liguori

> If so, I can take a look at making it more generic when I am back from
> holiday next week.
>
> Jes
>
>