Re: [Xen-devel] HVM guest performance regression

2017-05-26 Thread Juergen Gross
On 26/05/17 19:04, Dario Faggioli wrote: > On Fri, 2017-05-26 at 18:14 +0200, Juergen Gross wrote: >> Looking for the reason of a performance regression of HVM guests >> under >> Xen 4.7 against 4.5 I found the reason to be commit >> c26f92b8fce3c9df17f7ef035b54d97cbe931c7a ("libxl: remove >> freem

Re: [Xen-devel] HVM guest performance regression

2017-05-26 Thread Dario Faggioli
On Fri, 2017-05-26 at 18:14 +0200, Juergen Gross wrote: > Looking for the reason of a performance regression of HVM guests > under > Xen 4.7 against 4.5 I found the reason to be commit > c26f92b8fce3c9df17f7ef035b54d97cbe931c7a ("libxl: remove > freemem_slack") > in Xen 4.6. > > The problem occurr

[Xen-devel] HVM guest performance regression

2017-05-26 Thread Juergen Gross
Looking for the reason of a performance regression of HVM guests under Xen 4.7 against 4.5 I found the reason to be commit c26f92b8fce3c9df17f7ef035b54d97cbe931c7a ("libxl: remove freemem_slack") in Xen 4.6. The problem occurred when dom0 had to be ballooned down when starting the guest. The perfo