Re: [Xen-devel] inaccurate dirty_count from XEN_DOMCTL_SHADOW_OP

[Olaf Hering <olaf@xxxxxxxxx>]

Am Thu, 30 Mar 2017 12:40:34 +0100
schrieb Andrew Cooper <andrew.cooper3@xxxxxxxxxx>:

> On 22/03/17 10:59, Olaf Hering wrote:
> > On Wed, Mar 22, Olaf Hering wrote:
> >  
> >> Did the xc_shadow_control API change at some point?  
> > ... staging-4.5 works, while staging-4.6 does not.  
> 
> Can you describe in a little more detail what you are testing?

In the PV domU I run this memdirty tool to touch an amount of pages.
In the dom0 I run logdirty to see how many pages are dirty. With older Xen 
version the rate of dirty pages is high and constant. With 4.6+ the rate goes 
down after a while.

If you have trouble with reproducing I will prepare a simple testcase.

Olaf

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