linux-kernel - Re: [PATCH v2 2/5] KVM: add KVM request variants without barrier

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Message-ID: <20170228074051.GM10022@pxdev.xzpeter.org>
Date:   Tue, 28 Feb 2017 15:40:51 +0800
From:   Peter Xu <peterx@...hat.com>
To:     Radim Krčmář <rkrcmar@...hat.com>
Cc:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        Paolo Bonzini <pbonzini@...hat.com>,
        Andrew Jones <drjones@...hat.com>,
        Marc Zyngier <marc.zyngier@....com>,
        Christian Borntraeger <borntraeger@...ibm.com>,
        Cornelia Huck <cornelia.huck@...ibm.com>,
        James Hogan <james.hogan@...tec.com>,
        Paul Mackerras <paulus@...abs.org>,
        Christoffer Dall <christoffer.dall@...aro.org>,
        David Hildenbrand <david@...hat.com>
Subject: Re: [PATCH v2 2/5] KVM: add KVM request variants without barrier

On Tue, Feb 28, 2017 at 03:34:24PM +0800, Peter Xu wrote:

[...]

> > diff --git a/arch/mips/kvm/emulate.c b/arch/mips/kvm/emulate.c
> > index ee4af898bcf6..552ae2b5e911 100644
> > --- a/arch/mips/kvm/emulate.c
> > +++ b/arch/mips/kvm/emulate.c
> > @@ -865,7 +865,7 @@ enum emulation_result kvm_mips_emul_wait(struct kvm_vcpu *vcpu)
> >  		 * check if any I/O interrupts are pending.
> >  		 */
> >  		if (kvm_request_test_and_clear(KVM_REQ_UNHALT, vcpu)) {
> > -			clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
> > +			__kvm_request_clear(KVM_REQ_UNHALT, vcpu);
> 
> Shall we just remove above line since we cleared it already?

Please ignore this since I see patch 4. :-)

It'll be nice if patch 4 will be before this one, but it's trivial.

Thanks,

-- peterx