linux-kernel - Re: [PATCH v2 11/43] KVM: Don't block+unblock when halt-polling is successful

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Message-ID: <c04c9854be8fc9493739f17c2cbd26dd240a8465.camel@redhat.com>
Date:   Tue, 30 Nov 2021 00:55:17 +0200
From:   Maxim Levitsky <mlevitsk@...hat.com>
To:     Paolo Bonzini <pbonzini@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>
Cc:     Marc Zyngier <maz@...nel.org>, Huacai Chen <chenhuacai@...nel.org>,
        Aleksandar Markovic <aleksandar.qemu.devel@...il.com>,
        Paul Mackerras <paulus@...abs.org>,
        Anup Patel <anup.patel@....com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Christian Borntraeger <borntraeger@...ibm.com>,
        Janosch Frank <frankja@...ux.ibm.com>,
        James Morse <james.morse@....com>,
        Alexandru Elisei <alexandru.elisei@....com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Atish Patra <atish.patra@....com>,
        David Hildenbrand <david@...hat.com>,
        Cornelia Huck <cohuck@...hat.com>,
        Claudio Imbrenda <imbrenda@...ux.ibm.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>,
        linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.cs.columbia.edu,
        linux-mips@...r.kernel.org, kvm@...r.kernel.org,
        kvm-ppc@...r.kernel.org, kvm-riscv@...ts.infradead.org,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        David Matlack <dmatlack@...gle.com>,
        Oliver Upton <oupton@...gle.com>,
        Jing Zhang <jingzhangos@...gle.com>
Subject: Re: [PATCH v2 11/43] KVM: Don't block+unblock when halt-polling is
 successful

On Mon, 2021-11-29 at 18:55 +0100, Paolo Bonzini wrote:
> On 11/29/21 18:25, Sean Christopherson wrote:
> > > If I apply though only the patch series up to this patch, my fedora VM seems
> > > to work fine, but my windows VM still locks up hard when I run 'LatencyTop'
> > > in it, which doesn't happen without this patch.
> > 
> > Buy "run 'LatencyTop' in it", do you mean running something in the Windows guest?
> > The only search results I can find for LatencyTop are Linux specific.
> 
> I think it's LatencyMon, https://www.resplendence.com/latencymon.
> 
> Paolo
> 
Yes.

Best regards,
	Maxim Levitsky