KVM: disable halt_poll_ns as default for s390x
authorDavid Hildenbrand <dahi@linux.vnet.ibm.com>
Fri, 18 Sep 2015 10:34:53 +0000 (12:34 +0200)
committerPaolo Bonzini <pbonzini@redhat.com>
Fri, 25 Sep 2015 08:31:30 +0000 (10:31 +0200)
commit920552b213e3dc832a874b4e7ba29ecddbab31bc
treec07ed91961b7842a5056f98794c4827a0e493cea
parent58c95070da3a504fbeca7939435bbb062cb96ea3
KVM: disable halt_poll_ns as default for s390x

We observed some performance degradation on s390x with dynamic
halt polling. Until we can provide a proper fix, let's enable
halt_poll_ns as default only for supported architectures.

Architectures are now free to set their own halt_poll_ns
default value.

Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
arch/arm/include/asm/kvm_host.h
arch/arm64/include/asm/kvm_host.h
arch/mips/include/asm/kvm_host.h
arch/powerpc/include/asm/kvm_host.h
arch/s390/include/asm/kvm_host.h
arch/x86/include/asm/kvm_host.h
virt/kvm/kvm_main.c