Re: [Xen-devel] [PATCH v2 5/6] x86/viridian: make the threshold for HvNotifyLongSpinWait tunable

2017-03-21 Thread Paul Durrant
> -Original Message- > From: Jan Beulich [mailto:jbeul...@suse.com] > Sent: 21 March 2017 15:36 > To: Paul Durrant > Cc: Andrew Cooper ; xen- > de...@lists.xenproject.org > Subject: Re: [PATCH v2 5/6] x86/viridian: make the threshold for

Re: [Xen-devel] [PATCH v2 5/6] x86/viridian: make the threshold for HvNotifyLongSpinWait tunable

2017-03-21 Thread Jan Beulich
>>> On 20.03.17 at 18:08, wrote: > The current threshold before the guest issues the hypercall is, and always > has been, hard-coded to 2047. It is not clear where this number came > from so, to at least allow for ease of experimentation, this patch makes > the threshold

[Xen-devel] [PATCH v2 5/6] x86/viridian: make the threshold for HvNotifyLongSpinWait tunable

2017-03-20 Thread Paul Durrant
The current threshold before the guest issues the hypercall is, and always has been, hard-coded to 2047. It is not clear where this number came from so, to at least allow for ease of experimentation, this patch makes the threshold tunable via the Xen command line. Signed-off-by: Paul Durrant