Re: [Xen-devel] 4.2.1: Poor write performance for DomU.

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 20.02.13 at 10:49, Steven Haigh <netwiz@xxxxxxxxx> wrote:
> My build of Xen 4.2.1 also has all of the recent security advisories 
> patched as well. Although it is interesting to note that downgrading to 
> Xen 4.1.2 made no difference to write speeds.

Not surprising at all, considering that the hypervisor is only a passive
library for all PV I/O purposes. You're likely hunting for a kernel side
regression (and hence the mentioning of the hypervisor version as
the main factor in the subject is probably misleading).

Jan


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