Re: [Xen-devel] HVM domain with write caching going on somewhere to disk

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 8/11/07 10:40, "James Harper" <james.harper@xxxxxxxxxxxxxxxx> wrote:

> I've noticed before that any changes made in a Windows HVM domain
> shortly before an 'xm shutdown' don't ever get written out...
> 
> Anyway, is there a way to make sure that the qemu stuff doesn't do any
> write caching at all?

I don't think qemu caches writes internally, and also I believe that
outstanding I/O requests are serviced before a domain is shut down. Could
there be a problem with data ending up in the buffer cache in dom0 kernel?

 -- Keir



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