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authorChristian Borntraeger <borntraeger@de.ibm.com>2019-05-15 09:59:08 +0200
committerChristian Borntraeger <borntraeger@de.ibm.com>2019-05-20 09:40:39 +0200
commit6e9b622d1c3628fae65217465a148b157a361c2a (patch)
treeedf35c209426dcd87a034803b87d4852d273d811 /arch/s390
parentb41fb528dd8784a87414e3af5579674badefa76b (diff)
KVM: s390: change default halt poll time to 50us
Recent measurements indicate that using 50us results in a reduced CPU consumption, while still providing the benefit of halt polling. Let's use 50us instead. Acked-by: David Hildenbrand <david@redhat.com> Acked-by: Janosch Frank <frankja@linux.ibm.com> Acked-by: Cornelia Huck <cohuck@redhat.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'arch/s390')
-rw-r--r--arch/s390/include/asm/kvm_host.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h
index bdbc81b5bc91..2b00a3ebee08 100644
--- a/arch/s390/include/asm/kvm_host.h
+++ b/arch/s390/include/asm/kvm_host.h
@@ -36,7 +36,7 @@
*/
#define KVM_NR_IRQCHIPS 1
#define KVM_IRQCHIP_NUM_PINS 4096
-#define KVM_HALT_POLL_NS_DEFAULT 80000
+#define KVM_HALT_POLL_NS_DEFAULT 50000
/* s390-specific vcpu->requests bit members */
#define KVM_REQ_ENABLE_IBS KVM_ARCH_REQ(0)