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[35.185.214.157]) by smtp.gmail.com with ESMTPSA id lr6sm550689pjb.0.2021.12.01.18.00.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 01 Dec 2021 18:00:07 -0800 (PST) Date: Thu, 2 Dec 2021 02:00:03 +0000 From: Sean Christopherson To: Maxim Levitsky Subject: Re: [PATCH v2 11/43] KVM: Don't block+unblock when halt-polling is successful Message-ID: References: <20211009021236.4122790-1-seanjc@google.com> <20211009021236.4122790-12-seanjc@google.com> <4e883728e3e5201a94eb46b56315afca5e95ad9c.camel@redhat.com> <496c2fc6-26b0-9b5d-32f4-2f9e9dd6a064@redhat.com> <880a5727-69d1-72a1-b129-b053781625ad@redhat.com> <458c0819a578ba854f00089bc312c8faa177a81a.camel@redhat.com> <32eabe7d270e5a466ba2d9345b4270b8fe27700c.camel@redhat.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <32eabe7d270e5a466ba2d9345b4270b8fe27700c.camel@redhat.com> Cc: Cornelia Huck , Wanpeng Li , kvm@vger.kernel.org, David Hildenbrand , linux-kernel@vger.kernel.org, Paul Mackerras , Atish Patra , linux-riscv@lists.infradead.org, Claudio Imbrenda , kvmarm@lists.cs.columbia.edu, Janosch Frank , Marc Zyngier , Joerg Roedel , Huacai Chen , Christian Borntraeger , Aleksandar Markovic , Albert Ou , Wei Huang , kvm-ppc@vger.kernel.org, Paul Walmsley , David Matlack , linux-arm-kernel@lists.infradead.org, Jim Mattson , Anup Patel , linux-mips@vger.kernel.org, Palmer Dabbelt , kvm-riscv@lists.infradead.org, Paolo Bonzini , Vitaly Kuznetsov X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu T24gVGh1LCBEZWMgMDIsIDIwMjEsIE1heGltIExldml0c2t5IHdyb3RlOgo+IE9uIFR1ZSwgMjAy MS0xMS0zMCBhdCAwMDo1MyArMDIwMCwgTWF4aW0gTGV2aXRza3kgd3JvdGU6Cj4gPiBPbiBNb24s IDIwMjEtMTEtMjkgYXQgMjA6MTggKzAxMDAsIFBhb2xvIEJvbnppbmkgd3JvdGU6Cj4gPiBCYXNp Y2FsbHkgd2hhdCBJIHNlZSB0aGF0Cj4gPiAgCj4gPiAxLiB2Q1BVMiBkaXNhYmxlcyBpc19ydW5u aW5nIGluIGF2aWMgcGh5c2ljYWwgaWQgY2FjaGUKPiA+IDIuIHZDUFUyIGNoZWNrcyB0aGF0IElS UiBpcyBlbXB0eSBhbmQgaXQgaXMKPiA+IDMuIHZDUFUyIGRvZXMgc2NoZWR1bGUoKTsKPiA+ICAK PiA+IGFuZCBpdCBrZWVwcyBvbiBzbGVlcGluZyBmb3JldmVyLiBJZiBJIGtpY2sgaXQgdmlhIHNp Z25hbCAKPiA+IChsaWtlIGp1c3QgZG9pbmcgJ2luZm8gcmVnaXN0ZXJzJyBxZW11IGhtcCBjb21t YW5kCj4gPiBvciBqdXN0IHN0b3AvY29udCBvbiB0aGUgc2FtZSBobXAgaW50ZXJmYWNlLCB0aGUK PiA+IHZDUFUgd2FrZXMgdXAgYW5kIG5vdGljZXMgdGhhdCBJUlIgc3VkZGVubHkgaXMgbm90IGVt cHR5LAo+ID4gYW5kIHRoZSBWTSBjb21lcyBiYWNrIHRvIGxpZmUgKGFuZCB0aGVuIGhhbmdzIGFm dGVyIGEgd2hpbGUgYWdhaW4KPiA+IHdpdGggdGhlIHNhbWUgcHJvYmxlbS4uLi4pLgo+ID4gIAo+ ID4gQXMgZmFyIGFzIEkgc2VlIGluIHRoZSB0cmFjZXMsIHRoZSBiaXQgaW4gSVJSIGNhbWUgZnJv bQo+ID4gYW5vdGhlciBWQ1BVIHdobyBkaWRuJ3QgcmVzcGVjdCB0aGUgaXJfcnVubmluZyBiaXQg YW5kIGRpZG4ndCBnZXQgCj4gPiBBVklDX0lOQ09NUExFVEVfSVBJIFZNZXhpdC4KPiA+IEkgY2Fu J3QgMTAwJSBwcm92ZSBpdCB5ZXQsIGJ1dCBldmVyeXRoaW5nIGluIHRoZSB0cmFjZSBzaG93cyB0 aGlzLgoKLi4uCgo+IEkgYW0gbm93IGFsbW9zdCBzdXJlIHRoYXQgdGhpcyBpcyBlcnJhdGEgIzEy MzUuCj4gCj4gSSBoYWQgYXR0YWNoZWQgYSBrdm0tdW5pdC10ZXN0IEkgd3JvdGUgKHBhdGNoIGFn YWluc3QgbWFzdGVyIG9mCj4gaHR0cHM6Ly9naXRsYWIuY29tL2t2bS11bml0LXRlc3RzL2t2bS11 bml0LXRlc3RzLmdpdC8pIHdoaWNoIGlzIGFibGUgdG8KPiByZXByb2R1Y2UgdGhlIGlzc3VlIG9u IHN0b2NrIDUuMTUuMCBrZXJuZWwgKCpubyBwYXRjaGVzIGFwcGxpZWQgYXQgYWxsKikKPiBhZnRl ciBqdXN0IGZldyBzZWNvbmRzLiAgSWYga3ZtIGlzIGxvYWRlZCB3aXRob3V0IGhhbHQtcG9sbGlu ZyAodGhhdCBpcwo+IGhhbHRfcG9sbF9ucz0wIGlzIHVzZWQpLgo+IAo+IEhhbHQgcG9sbGluZyBh bmQvb3IgU2VhbidzIHBhdGNoIGFyZSBub3QgdG8gYmxhbWUsIGl0IGp1c3QgY2hhbmdlcyB0aW1l aW5nLgo+IFdpdGggU2VhbidzIHBhdGNoIEkgZG9uJ3QgbmVlZCB0byBkaXNhYmxlIGhhbGYgcG9s bGluZy4KCkhtbSwgdGhhdCBzdWdnZXN0cyB0aGUgYnVnL2VycmF0dW0gaXMgZHVlIHRvIHRoZSBD UFUgY29uc3VtaW5nIHN0YWxlIGRhdGEgZnJvbSAjNApmb3IgdGhlIElzUnVubmluZyBjaGVjayBp biAjNSwgb3IgcmV0aXJpbmcgdW9wcyBmb3IgdGhlIElzUnVubmluZyBjaGVjayBiZWZvcmUKcmV0 aXJpbmcgdGhlIHZJUlIgdXBkYXRlLiAgSXQgd291bGQgYmUgaGVscGZ1bCBpZiB0aGUgZXJyYXR1 bSBhY3R1YWxseSBwcm92aWRlZAppbmZvIG9uIHRoZSAiaGlnaGx5IHNwZWNpZmljIGFuZCBkZXRh aWxlZCBzZXQgb2YgaW50ZXJuYWwgdGltaW5nIGNvbmRpdGlvbnMiLiA6LS8KCiAgNC4gTG9va3Vw IHRoZSB2QVBJQyBiYWNraW5nIHBhZ2UgYWRkcmVzcyBpbiB0aGUgUGh5c2ljYWwgQVBJQyB0YWJs ZSB1c2luZyB0aGUKICAgICBndWVzdCBwaHlzaWNhbCBBUElDIElEIGFzIGFuIGluZGV4IGludG8g dGhlIHRhYmxlLgogIDUuIEZvciBldmVyeSB2YWxpZCBkZXN0aW5hdGlvbjoKICAgICAtIEF0b21p Y2FsbHkgc2V0IHRoZSBhcHByb3ByaWF0ZSBJUlIgYml0IGluIGVhY2ggb2YgdGhlIGRlc3RpbmF0 aW9uc+KAmSB2QVBJQwogICAgICAgYmFja2luZyBwYWdlLgogICAgIC0gQ2hlY2sgdGhlIElzUnVu bmluZyBzdGF0dXMgb2YgZWFjaCBkZXN0aW5hdGlvbi4KX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX18Ka3ZtYXJtIG1haWxpbmcgbGlzdAprdm1hcm1AbGlzdHMu Y3MuY29sdW1iaWEuZWR1Cmh0dHBzOi8vbGlzdHMuY3MuY29sdW1iaWEuZWR1L21haWxtYW4vbGlz dGluZm8va3ZtYXJtCg==