From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by smtp.lore.kernel.org (Postfix) with ESMTP id EA60DC433F5 for ; Thu, 2 Dec 2021 10:31:44 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 5CB4C4B1AC; Thu, 2 Dec 2021 05:31:44 -0500 (EST) X-Virus-Scanned: at lists.cs.columbia.edu Authentication-Results: mm01.cs.columbia.edu (amavisd-new); dkim=softfail (fail, message has been altered) header.i=@gmail.com Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Hqs7qRtMq2+n; Thu, 2 Dec 2021 05:31:43 -0500 (EST) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 2958B4B13D; Thu, 2 Dec 2021 05:31:43 -0500 (EST) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 777E64B08E for ; Thu, 2 Dec 2021 05:31:42 -0500 (EST) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id zyQtJOZGoLkJ for ; Thu, 2 Dec 2021 05:31:41 -0500 (EST) Received: from mail-ed1-f44.google.com (mail-ed1-f44.google.com [209.85.208.44]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id DD76940256 for ; Thu, 2 Dec 2021 05:31:40 -0500 (EST) Received: by mail-ed1-f44.google.com with SMTP id z5so49005068edd.3 for ; Thu, 02 Dec 2021 02:31:40 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=sender:message-id:date:mime-version:user-agent:subject :content-language:to:cc:references:from:in-reply-to :content-transfer-encoding; bh=N6k1dm8k+AuxT/kkINJ2uWzQD41QhKsh8yex3G7gZCI=; b=G/KcWY4NdiSiLbGwFVbMpplGKklwuLS8kzHzGur5jlThpat8rYTmvJEuvKnby0ikS5 iMXoT3JaN8/6uGdTfqTV64IRpBhuVbTwgoqPRIuAnlOPg4YXFHbD8LSvudKuqUlIFuXo 1B6vYQLwbiH5PukJHZ2d+B/hG4wyhNqTRUH+WJYFxX/aAnWG5ofBg3HiNT96ZFyJ9nM8 RMfYqLt3L+O6eWXJQeNtUQxDFA97RXOHZgU97mHvKCkbWJ/oRSQWohVhbpxKbOUFzh4K /WIYiCEYMqmZsjs0IaWV39/CdP/UEiDeWQkZevioyJUXTo+ileWjeLZdsdLPjDzl5ytc MDlw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:sender:message-id:date:mime-version:user-agent :subject:content-language:to:cc:references:from:in-reply-to :content-transfer-encoding; bh=N6k1dm8k+AuxT/kkINJ2uWzQD41QhKsh8yex3G7gZCI=; b=Q7iNMXYcDJhniIcwlDSL4+md/Van9NkTnyfFVuK4dHn7dWiQI8EF1VCA+YC7gDD/a4 pWf6XroyR/9RzAqRhAa6EzZkN/GngFWQH902qgJXVY77OacjIZKDbbWh7axZEmZN0NHi ZzpFR5EWeEtZ792aNJ+8y5A9SC/d4TKPSt8Sn/MDSn2DWjof9cMEdUas8QgBeqQoDIX9 087uC8xszjHz2XVzBy154wuArECaY/eYBQUYT72cp2zcgLq8+6MZfkOCoCNZAIzXCiZF BaibE7bdqnaZn8wetiXA8CJ6+Pv9eZEq9ldrDwUZNmULyIEzsTynKaerb9vqAXv3Bt4Q labA== X-Gm-Message-State: AOAM533QE08P23G5pvGWBUHL0/1chRgoTsOFOjPBuiTkHKvXYXOCiN4Q RnhfF4rbsnkjrydUQDpZ//4= X-Google-Smtp-Source: ABdhPJwhpBxx1yFRODBtJrFnn3nCW7H/sTu+w+jLDDEQAemKg7xUPHKBK5f7DJw2WZKCGsUGKU9xRg== X-Received: by 2002:a17:906:ce2a:: with SMTP id sd10mr14431289ejb.154.1638441099804; Thu, 02 Dec 2021 02:31:39 -0800 (PST) Received: from ?IPV6:2001:b07:add:ec09:c399:bc87:7b6c:fb2a? ([2001:b07:add:ec09:c399:bc87:7b6c:fb2a]) by smtp.googlemail.com with ESMTPSA id w5sm1912110edc.58.2021.12.02.02.31.32 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 02 Dec 2021 02:31:39 -0800 (PST) Message-ID: <6200f141-8e6f-fe68-9539-22aa68559cb7@redhat.com> Date: Thu, 2 Dec 2021 11:31:28 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.2.0 Subject: Re: [PATCH v2 11/43] KVM: Don't block+unblock when halt-polling is successful Content-Language: en-US To: Sean Christopherson , Maxim Levitsky 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> From: Paolo Bonzini In-Reply-To: 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, 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-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu T24gMTIvMi8yMSAwMzowMCwgU2VhbiBDaHJpc3RvcGhlcnNvbiB3cm90ZToKPiBIbW0sIHRoYXQg c3VnZ2VzdHMgdGhlIGJ1Zy9lcnJhdHVtIGlzIGR1ZSB0byB0aGUgQ1BVIGNvbnN1bWluZyBzdGFs ZSBkYXRhIGZyb20gIzQKPiBmb3IgdGhlIElzUnVubmluZyBjaGVjayBpbiAjNSwgb3IgcmV0aXJp bmcgdW9wcyBmb3IgdGhlIElzUnVubmluZyBjaGVjayBiZWZvcmUKPiByZXRpcmluZyB0aGUgdklS UiB1cGRhdGUuCgpZZXMsIHRoaXMgc2VlbXMgdG8gYmUgYW4gZXJyb3IgaW4gdGhlIGltcGxlbWVu dGF0aW9uIG9mIHN0ZXAgNS4gIEluIAphc3NlbWJseSwgYXRvbWljIG9wZXJhdGlvbnMgaGF2ZSBp bXBsaWNpdCBtZW1vcnkgYmFycmllcnMsIGJ1dCB3aG8ga25vd3MgCndoYXQncyBnb2luZyBvbiBp biBtaWNyb2NvZGUuICBTbyBlaXRoZXIgaXQncyB0aGUgZm9ybWVyLCBvciBzb21ldGhpbmcgCmlz IGdvaW5nIG9uIHRoYXQncyBzcGVjaWZpYyB0byB0aGUgbWljcm9jb2RlIHNlcXVlbmNlciwgb3Ig aXQncyBhIG1vcmUgCm11bmRhbmUgaW1wbGVtZW50YXRpb24gYnVnLgoKSW4gYW55IGNhc2UsIEFW SUMgaXMgZGlzYWJsZWQgZm9yIG5vdyBhbmQgd2lsbCBuZWVkIGEgbGlzdCBvZiBtb2RlbCAKd2hl cmUgaXQgd29ya3MsIHNvIEknbGwgZ28gb24gYW5kIHF1ZXVlIHRoZSBmaXJzdCBwYXJ0IG9mIHRo aXMgc2VyaWVzLgoKUGFvbG8KCj4gSXQgd291bGQgYmUgaGVscGZ1bCBpZiB0aGUgZXJyYXR1bSBh Y3R1YWxseSBwcm92aWRlZAo+IGluZm8gb24gdGhlICJoaWdobHkgc3BlY2lmaWMgYW5kIGRldGFp bGVkIHNldCBvZiBpbnRlcm5hbCB0aW1pbmcgY29uZGl0aW9ucyIuIDotLwo+IAo+ICAgIDQuIExv b2t1cCB0aGUgdkFQSUMgYmFja2luZyBwYWdlIGFkZHJlc3MgaW4gdGhlIFBoeXNpY2FsIEFQSUMg dGFibGUgdXNpbmcgdGhlCj4gICAgICAgZ3Vlc3QgcGh5c2ljYWwgQVBJQyBJRCBhcyBhbiBpbmRl eCBpbnRvIHRoZSB0YWJsZS4KPiAgICA1LiBGb3IgZXZlcnkgdmFsaWQgZGVzdGluYXRpb246Cj4g ICAgICAgLSBBdG9taWNhbGx5IHNldCB0aGUgYXBwcm9wcmlhdGUgSVJSIGJpdCBpbiBlYWNoIG9m IHRoZSBkZXN0aW5hdGlvbnPigJkgdkFQSUMKPiAgICAgICAgIGJhY2tpbmcgcGFnZS4KPiAgICAg ICAtIENoZWNrIHRoZSBJc1J1bm5pbmcgc3RhdHVzIG9mIGVhY2ggZGVzdGluYXRpb24uCgpfX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwprdm1hcm0gbWFpbGlu ZyBsaXN0Cmt2bWFybUBsaXN0cy5jcy5jb2x1bWJpYS5lZHUKaHR0cHM6Ly9saXN0cy5jcy5jb2x1 bWJpYS5lZHUvbWFpbG1hbi9saXN0aW5mby9rdm1hcm0K