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Re: [Qemu-ppc] [PATCH v4 1/2] KVM: remove NULL return path for vcpu ids
From: |
Cornelia Huck |
Subject: |
Re: [Qemu-ppc] [PATCH v4 1/2] KVM: remove NULL return path for vcpu ids >= KVM_MAX_VCPUS |
Date: |
Tue, 26 Apr 2016 09:44:58 +0200 |
On Thu, 21 Apr 2016 16:15:05 +0200
Greg Kurz <address@hidden> wrote:
> Commit c896939f7cff ("KVM: use heuristic for fast VCPU lookup by id") added
> a return path that prevents vcpu ids to exceed KVM_MAX_VCPUS. This is a
> problem for powerpc where vcpu ids can grow up to 8*KVM_MAX_VCPUS.
>
> This patch simply reverses the logic so that we only try fast path if the
> vcpu id can be tried as an index in kvm->vcpus[]. The slow path is not
> affected by the change.
>
> Signed-off-by: Greg Kurz <address@hidden>
> ---
> include/linux/kvm_host.h | 7 ++++---
> 1 file changed, 4 insertions(+), 3 deletions(-)
Reviewed-by: Cornelia Huck <address@hidden>
- [Qemu-ppc] [PATCH v4 0/2] let archs decide for vcpu ids, Greg Kurz, 2016/04/21
- [Qemu-ppc] [PATCH v4 1/2] KVM: remove NULL return path for vcpu ids >= KVM_MAX_VCPUS, Greg Kurz, 2016/04/21
- [Qemu-ppc] [PATCH v4 2/2] KVM: move vcpu id checking to archs, Greg Kurz, 2016/04/21
- Re: [Qemu-ppc] [PATCH v4 2/2] KVM: move vcpu id checking to archs, Radim Krčmář, 2016/04/21
- Re: [Qemu-ppc] [PATCH v4 2/2] KVM: move vcpu id checking to archs, Greg Kurz, 2016/04/21
- Re: [Qemu-ppc] [PATCH v4 2/2] KVM: move vcpu id checking to archs, Radim Krčmář, 2016/04/21
- Re: [Qemu-ppc] [PATCH v4 2/2] KVM: move vcpu id checking to archs, Greg Kurz, 2016/04/22
- Re: [Qemu-ppc] [PATCH v4 2/2] KVM: move vcpu id checking to archs, Cornelia Huck, 2016/04/22
- Re: [Qemu-ppc] [PATCH v4 2/2] KVM: move vcpu id checking to archs, Igor Mammedov, 2016/04/22
- Re: [Qemu-ppc] [PATCH v4 2/2] KVM: move vcpu id checking to archs, Radim Krčmář, 2016/04/22