| Message ID | 20220915101049.187325-5-shivam.kumar1@nutanix.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | KVM: Dirty quota-based throttling | expand |
Am 15.09.22 um 12:10 schrieb Shivam Kumar: > Exit to userspace whenever the dirty quota is exhausted (i.e. dirty count > equals/exceeds dirty quota) to request more dirty quota. > > Suggested-by: Shaju Abraham <shaju.abraham@nutanix.com> > Suggested-by: Manish Mishra <manish.mishra@nutanix.com> > Co-developed-by: Anurag Madnawat <anurag.madnawat@nutanix.com> > Signed-off-by: Anurag Madnawat <anurag.madnawat@nutanix.com> > Signed-off-by: Shivam Kumar <shivam.kumar1@nutanix.com> > --- > arch/s390/kvm/kvm-s390.c | 9 +++++++++ > 1 file changed, 9 insertions(+) > > diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c > index edfd4bbd0cba..2fe2933a7064 100644 > --- a/arch/s390/kvm/kvm-s390.c > +++ b/arch/s390/kvm/kvm-s390.c > @@ -4343,6 +4343,15 @@ static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu) > goto retry; > } > > + if (kvm_check_request(KVM_REQ_DIRTY_QUOTA_EXIT, vcpu)) { > + struct kvm_run *run = vcpu->run; > + > + run->exit_reason = KVM_EXIT_DIRTY_QUOTA_EXHAUSTED; > + run->dirty_quota_exit.count = vcpu->stat.generic.pages_dirtied; > + run->dirty_quota_exit.quota = vcpu->dirty_quota; > + return 1; > + } Please use return -EREMOTE; We use this in s390 code to indicate "we need exit to userspace" and kvm_arch_vcpu_ioctl_run will change -EREMOTE to 0. > + > /* nothing to do, just clear the request */ > kvm_clear_request(KVM_REQ_UNHALT, vcpu); > /* we left the vsie handler, nothing to do, just clear the request */
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index edfd4bbd0cba..2fe2933a7064 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -4343,6 +4343,15 @@ static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu) goto retry; } + if (kvm_check_request(KVM_REQ_DIRTY_QUOTA_EXIT, vcpu)) { + struct kvm_run *run = vcpu->run; + + run->exit_reason = KVM_EXIT_DIRTY_QUOTA_EXHAUSTED; + run->dirty_quota_exit.count = vcpu->stat.generic.pages_dirtied; + run->dirty_quota_exit.quota = vcpu->dirty_quota; + return 1; + } + /* nothing to do, just clear the request */ kvm_clear_request(KVM_REQ_UNHALT, vcpu); /* we left the vsie handler, nothing to do, just clear the request */