Messages in this thread | | | Subject | Re: [PATCH v3 5/6] virt, sched: add cpu pinning to smp_call_sync_on_phys_cpu() | From | Juergen Gross <> | Date | Fri, 1 Apr 2016 11:26:25 +0200 |
| |
On 01/04/16 11:15, Peter Zijlstra wrote: > On Fri, Apr 01, 2016 at 11:03:21AM +0200, Juergen Gross wrote: >>> Maybe just make the vpin thing an option like: >>> >>> smp_call_on_cpu(int (*func)(void *), int phys_cpu); > >>> Also; is something like the vpin thing possible on KVM? because if we're >>> going to expose it to generic code like this we had maybe look at wider >>> support. >> >> It is necessary for dom0 under Xen. I don't think there is a need to do >> this on KVM as a guest has no direct access to e.g. BIOS functions of >> the real hardware and the host system needs no vcpu pinning. I'm not >> sure about VMWare. > > OK, then can we WARN if .phys=1 and the platform doesn't support it? >
Yes, good idea.
Juergen
| |