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| author | David Hildenbrand <dahi@linux.vnet.ibm.com> | 2015-09-18 12:34:53 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2015-09-25 10:31:30 +0200 |
| commit | 920552b213e3dc832a874b4e7ba29ecddbab31bc (patch) | |
| tree | c07ed91961b7842a5056f98794c4827a0e493cea /arch/powerpc | |
| parent | 58c95070da3a504fbeca7939435bbb062cb96ea3 (diff) | |
| download | lwn-920552b213e3dc832a874b4e7ba29ecddbab31bc.tar.gz lwn-920552b213e3dc832a874b4e7ba29ecddbab31bc.zip | |
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>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/include/asm/kvm_host.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h index 195886a583ba..827a38d7a9db 100644 --- a/arch/powerpc/include/asm/kvm_host.h +++ b/arch/powerpc/include/asm/kvm_host.h @@ -44,6 +44,7 @@ #ifdef CONFIG_KVM_MMIO #define KVM_COALESCED_MMIO_PAGE_OFFSET 1 #endif +#define KVM_HALT_POLL_NS_DEFAULT 500000 /* These values are internal and can be increased later */ #define KVM_NR_IRQCHIPS 1 |