Re: [PATCH] KVM: PPC: Book3s PR: Disable AIL mode with OPAL

2014-06-17 Thread Alexander Graf
On 12.06.14 05:56, Paul Mackerras wrote: On Tue, Jun 10, 2014 at 07:23:00PM +0200, Alexander Graf wrote: When we're using PR KVM we must not allow the CPU to take interrupts in virtual mode, as the SLB does not contain host kernel mappings when running inside the guest context. To make sure we

Re: [PATCH] KVM: PPC: Book3s PR: Disable AIL mode with OPAL

2014-06-11 Thread Paul Mackerras
On Tue, Jun 10, 2014 at 07:23:00PM +0200, Alexander Graf wrote: > When we're using PR KVM we must not allow the CPU to take interrupts > in virtual mode, as the SLB does not contain host kernel mappings > when running inside the guest context. > > To make sure we get good performance for non-KVM t

[PATCH] KVM: PPC: Book3s PR: Disable AIL mode with OPAL

2014-06-10 Thread Alexander Graf
When we're using PR KVM we must not allow the CPU to take interrupts in virtual mode, as the SLB does not contain host kernel mappings when running inside the guest context. To make sure we get good performance for non-KVM tasks but still properly functioning PR KVM, let's just disable AIL wheneve