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Groups > linux.kernel > #1438536
| From | Peter Zijlstra <peterz@infradead.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH v2 0/4] implement vcpu preempted check |
| Date | 2016-07-07 13:30 +0200 |
| Message-ID | <rSfFf-6fa-15@gated-at.bofh.it> (permalink) |
| References | (2 earlier) <rRSyZ-850-11@gated-at.bofh.it> <rRTOp-Bq-3@gated-at.bofh.it> <rRUhs-Lb-13@gated-at.bofh.it> <rSdap-4y2-5@gated-at.bofh.it> <rSe6u-59g-15@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Thu, Jul 07, 2016 at 11:42:15AM +0200, Peter Zijlstra wrote:
> +static void update_steal_time_preempt(struct kvm_vcpu *vcpu)
> +{
> + struct kvm_steal_time *st;
> +
> + if (!(vcpu->arch.st.msr_val & KVM_MSR_ENABLED))
> + return;
> +
> + if (unlikely(kvm_read_guest_cached(vcpu->kvm, &vcpu->arch.st.stime,
> + &vcpu->arch.st.steal, sizeof(struct kvm_steal_time))))
> + return;
> +
> + st = &vcpu->arch.st.steal;
> +
> + st->pad[KVM_ST_PAD_PREEMPT] = 1; /* we've stopped running */
So maybe have this be:
... = kvm_vcpu_running();
That avoids marking the vcpu preempted when we do hlt and such.
> + kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.st.stime,
> + st, sizeof(struct kvm_steal_time));
> +}
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[PATCH v2 0/4] implement vcpu preempted check Pan Xinhui <xinhui.pan@linux.vnet.ibm.com> - 2016-06-28 12:50 +0200
[PATCH v2 1/4] kernel/sched: introduce vcpu preempted check interface Pan Xinhui <xinhui.pan@linux.vnet.ibm.com> - 2016-06-28 12:50 +0200
[PATCH v2 3/4] locking/osq: Drop the overload of osq_lock() Pan Xinhui <xinhui.pan@linux.vnet.ibm.com> - 2016-06-28 12:50 +0200
[PATCH v2 2/4] powerpc/spinlock: support vcpu preempted check Pan Xinhui <xinhui.pan@linux.vnet.ibm.com> - 2016-06-28 12:50 +0200
Re: [PATCH v2 2/4] powerpc/spinlock: support vcpu preempted check Wanpeng Li <kernellwp@gmail.com> - 2016-07-05 12:00 +0200
Re: [PATCH v2 2/4] powerpc/spinlock: support vcpu preempted check xinhui <xinhui.pan@linux.vnet.ibm.com> - 2016-07-06 07:00 +0200
Re: [PATCH v2 2/4] powerpc/spinlock: support vcpu preempted check Wanpeng Li <kernellwp@gmail.com> - 2016-07-06 08:50 +0200
Re: [PATCH v2 2/4] powerpc/spinlock: support vcpu preempted check Peter Zijlstra <peterz@infradead.org> - 2016-07-06 10:00 +0200
Re: [PATCH v2 2/4] powerpc/spinlock: support vcpu preempted check Wanpeng Li <kernellwp@gmail.com> - 2016-07-06 10:40 +0200
Re: [PATCH v2 2/4] powerpc/spinlock: support vcpu preempted check xinhui <xinhui.pan@linux.vnet.ibm.com> - 2016-07-06 12:20 +0200
Re: [PATCH v2 2/4] powerpc/spinlock: support vcpu preempted check Balbir Singh <bsingharora@gmail.com> - 2016-07-06 13:00 +0200
[PATCH v2 4/4] kernel/locking: Drop the overload of {mutex,rwsem}_spin_on_owner Pan Xinhui <xinhui.pan@linux.vnet.ibm.com> - 2016-06-28 12:50 +0200
Re: [PATCH v2 0/4] implement vcpu preempted check Peter Zijlstra <peterz@infradead.org> - 2016-07-06 09:00 +0200
Re: [PATCH v2 0/4] implement vcpu preempted check Juergen Gross <jgross@suse.com> - 2016-07-06 09:50 +0200
Re: [PATCH v2 0/4] implement vcpu preempted check Peter Zijlstra <peterz@infradead.org> - 2016-07-06 10:20 +0200
Re: [PATCH v2 0/4] implement vcpu preempted check Juergen Gross <jgross@suse.com> - 2016-07-06 10:40 +0200
Re: [PATCH v2 0/4] implement vcpu preempted check Paolo Bonzini <pbonzini@redhat.com> - 2016-07-06 14:50 +0200
Re: [PATCH v2 0/4] implement vcpu preempted check Christian Borntraeger <borntraeger@de.ibm.com> - 2016-07-06 19:00 +0200
Re: [PATCH v2 0/4] implement vcpu preempted check xinhui <xinhui.pan@linux.vnet.ibm.com> - 2016-07-06 12:10 +0200
Re: [PATCH v2 0/4] implement vcpu preempted check Paolo Bonzini <pbonzini@redhat.com> - 2016-07-06 12:50 +0200
Re: [PATCH v2 0/4] implement vcpu preempted check Wanpeng Li <kernellwp@gmail.com> - 2016-07-06 14:10 +0200
Re: [PATCH v2 0/4] implement vcpu preempted check Paolo Bonzini <pbonzini@redhat.com> - 2016-07-06 14:40 +0200
Re: [PATCH v2 0/4] implement vcpu preempted check Wanpeng Li <kernellwp@gmail.com> - 2016-07-06 15:10 +0200
Re: [PATCH v2 0/4] implement vcpu preempted check Wanpeng Li <kernellwp@gmail.com> - 2016-07-07 10:50 +0200
Re: [PATCH v2 0/4] implement vcpu preempted check Peter Zijlstra <peterz@infradead.org> - 2016-07-07 11:50 +0200
Re: [PATCH v2 0/4] implement vcpu preempted check Wanpeng Li <kernellwp@gmail.com> - 2016-07-07 12:20 +0200
Re: [PATCH v2 0/4] implement vcpu preempted check Wanpeng Li <kernellwp@gmail.com> - 2016-07-07 12:30 +0200
Re: [PATCH v2 0/4] implement vcpu preempted check Peter Zijlstra <peterz@infradead.org> - 2016-07-07 13:20 +0200
Re: [PATCH v2 0/4] implement vcpu preempted check Peter Zijlstra <peterz@infradead.org> - 2016-07-07 13:10 +0200
Re: [PATCH v2 0/4] implement vcpu preempted check Peter Zijlstra <peterz@infradead.org> - 2016-07-07 13:10 +0200
Re: [PATCH v2 0/4] implement vcpu preempted check Peter Zijlstra <peterz@infradead.org> - 2016-07-07 13:30 +0200
Re: [PATCH v2 0/4] implement vcpu preempted check Peter Zijlstra <peterz@infradead.org> - 2016-07-06 14:10 +0200
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