From: Vitaly Kuznetsov <vkuznets@redhat.com>
To: Paolo Bonzini <pbonzini@redhat.com>, Wanpeng Li <kernellwp@gmail.com>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>,
linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Subject: Re: [PATCH 1/3] KVM: Don't need to wakeup vCPU twice afer timer fire
Date: Wed, 31 Jul 2019 15:14:10 +0200 [thread overview]
Message-ID: <87imri73dp.fsf@vitty.brq.redhat.com> (raw)
In-Reply-To: <ab8f8b07-e3f9-4831-c386-0bfa0314f9c3@redhat.com>
Paolo Bonzini <pbonzini@redhat.com> writes:
> On 31/07/19 13:27, Wanpeng Li wrote:
>> From: Wanpeng Li <wanpengli@tencent.com>
>>
>> kvm_set_pending_timer() will take care to wake up the sleeping vCPU which
>> has pending timer, don't need to check this in apic_timer_expired() again.
>
> No, it doesn't. kvm_make_request never kicks the vCPU.
>
Hm, but kvm_set_pending_timer() currently looks like:
void kvm_set_pending_timer(struct kvm_vcpu *vcpu)
{
kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu);
kvm_vcpu_kick(vcpu);
}
--
Vitaly
next prev parent reply other threads:[~2019-07-31 13:14 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-31 11:27 [PATCH 1/3] KVM: Don't need to wakeup vCPU twice afer timer fire Wanpeng Li
2019-07-31 11:27 ` [PATCH 2/3] KVM: Check preempted_in_kernel for involuntary preemption Wanpeng Li
2019-07-31 11:27 ` [PATCH 3/3] KVM: Fix leak vCPU's VMCS value into other pCPU Wanpeng Li
2019-07-31 11:39 ` [PATCH v2 " Wanpeng Li
2019-07-31 12:55 ` Paolo Bonzini
2019-08-01 3:35 ` Wanpeng Li
2019-07-31 12:56 ` [PATCH 1/3] KVM: Don't need to wakeup vCPU twice afer timer fire Paolo Bonzini
2019-07-31 13:14 ` Vitaly Kuznetsov [this message]
2019-07-31 16:39 ` Paolo Bonzini
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=87imri73dp.fsf@vitty.brq.redhat.com \
--to=vkuznets@redhat.com \
--cc=kernellwp@gmail.com \
--cc=kvm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=pbonzini@redhat.com \
--cc=rkrcmar@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox