[PATCH] xen: Introduce 'xen_nopv' to disable PV extensions for HVM guests.

2014-07-14 Thread Konrad Rzeszutek Wilk
By default when CONFIG_XEN and CONFIG_XEN_PVHVM kernels are run, they will enable the PV extensions (drivers, interrupts, timers, etc) - which is the best option for the majority of use cases. However, in some cases (kexec not fully working, benchmarking) we want to disable Xen PV extensions. As s

Re: [PATCH] xen: Introduce 'xen_nopv' to disable PV extensions for HVM guests.

2014-07-11 Thread Konrad Rzeszutek Wilk
On Jul 11, 2014 7:14 PM, "H. Peter Anvin" wrote: > > On 07/11/2014 04:09 PM, Konrad Rzeszutek Wilk wrote: > > > > On Jul 11, 2014 6:52 PM, "H. Peter Anvin" wrote: > >> > >> On 07/11/2014 12:53 PM, kon...@kernel.org wrote: > >>> > >>> diff --git a/Documentation/kernel-parameters.txt > >>>

Re: [PATCH] xen: Introduce 'xen_nopv' to disable PV extensions for HVM guests.

2014-07-11 Thread H. Peter Anvin
On 07/11/2014 04:09 PM, Konrad Rzeszutek Wilk wrote: > > On Jul 11, 2014 6:52 PM, "H. Peter Anvin" wrote: >> >> On 07/11/2014 12:53 PM, kon...@kernel.org wrote: >>> >>> diff --git a/Documentation/kernel-parameters.txt >>> b/Documentation/kernel-parameters.txt >>> index c1b9aa8..5dcfa6e 100644

Re: [PATCH] xen: Introduce 'xen_nopv' to disable PV extensions for HVM guests.

2014-07-11 Thread Konrad Rzeszutek Wilk
On Jul 11, 2014 6:52 PM, "H. Peter Anvin" wrote: > > On 07/11/2014 12:53 PM, kon...@kernel.org wrote: > > > > diff --git a/Documentation/kernel-parameters.txt > > b/Documentation/kernel-parameters.txt > > index c1b9aa8..5dcfa6e 100644 > > --- a/Documentation/kernel-parameters.txt > > +++ b/

Re: [PATCH] xen: Introduce 'xen_nopv' to disable PV extensions for HVM guests.

2014-07-11 Thread H. Peter Anvin
On 07/11/2014 12:53 PM, kon...@kernel.org wrote: > > diff --git a/Documentation/kernel-parameters.txt > b/Documentation/kernel-parameters.txt > index c1b9aa8..5dcfa6e 100644 > --- a/Documentation/kernel-parameters.txt > +++ b/Documentation/kernel-parameters.txt > @@ -3691,6 +3691,10 @@ bytes resp

[PATCH] xen: Introduce 'xen_nopv' to disable PV extensions for HVM guests.

2014-07-11 Thread konrad
From: Konrad Rzeszutek Wilk By default when CONFIG_XEN and CONFIG_XEN_PVHVM kernels are run, they will enable the PV extensions (drivers, interrupts, timers, etc) - which is the best option for the majority of use cases. However, in some cases (kexec not fully working, benchmarking) we want to d