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 X-Spam-Level: X-Spam-Status: No, score=-18.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_IN_DEF_DKIM_WL autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2AC07C433EF for ; Thu, 2 Sep 2021 20:57:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 15C4860249 for ; Thu, 2 Sep 2021 20:57:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347301AbhIBU6Q (ORCPT ); Thu, 2 Sep 2021 16:58:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54322 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1347198AbhIBU6N (ORCPT ); Thu, 2 Sep 2021 16:58:13 -0400 Received: from mail-pg1-x536.google.com (mail-pg1-x536.google.com [IPv6:2607:f8b0:4864:20::536]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 117CEC061757 for ; Thu, 2 Sep 2021 13:57:15 -0700 (PDT) Received: by mail-pg1-x536.google.com with SMTP id f129so3306748pgc.1 for ; Thu, 02 Sep 2021 13:57:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=AKvoBglyKyX6FOVMBLB/URNeY80PWCKE3Lo+SAFXI3k=; b=I0126LUhSD04CPCw4NfU0xi6Grfk2wjNYQRqWhZ2iOjuKglbP3AD/1E2rxglR4eqNc DdX3w8JzqQQH3hNWFfvTPXXjh2+dFfbeO4FA6jCRnlTCTjMeF2NpPBumA3HEr0NrUdxf S0DkZDKDTD3ejQMUECTQNJO8OHQhjM3R33UV68hmzRwCApTNPwt+XBesICvcgmKy+uO2 I3PyHC2gE0qNX6iNXg0+5XhUPuJSKAIiG5L700Ho3x/W/1j1mr0SY++iz+nLz2vYjnZ3 ytFh15AkqwWicUz1FlSAPt6vWCeIrjsSHPFXb6RYhApDX/a93eOR2oNaSdqJ9P+BFRHW 5TYw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=AKvoBglyKyX6FOVMBLB/URNeY80PWCKE3Lo+SAFXI3k=; b=NJLl/JXhdMy+jDtSNNInnQYqyIRTU8admZsOTRWMuGABmQ3AU1Ac/KM/JWoozwl5C3 rxEo8pOoFOSTwmdQj21LI3rgOUerpB1I8Kvod5iWy5ASim8ytSv3tJpTYdegZdaEy0FP jD3qxVLBKEfJC5MJ1WewoCpPfRC1VP+Vdx4vGbWRN1KFCMP8s3EPCsiXa57MnDlFVly6 6UPgAbQbKlL0s2d6BnqmcaMDRlwu7Ox1yUqGQuBPh6fnTtn2qrxvsHpGFmIbWAfwLsvF 5MGrQethz53uzG53F4QCELj2L3qlipBNUqJe7wxtShPqWVZCq8ncnCv84a5s6Gmz4rkJ YtuQ== X-Gm-Message-State: AOAM530tZv64yHMTyleQvxeFV/ZLdBn5zyeBaorI2YdqPFyQnumFLSut ncn5NrUEBwhZa03CDf8poCUVlw== X-Google-Smtp-Source: ABdhPJxzTD7xp5K/i9sHGH587GJ8tZkJXnLGOqiJwoNVv8Rls8D2cm5udFmcc86bB3yp/lT+Rd2yLA== X-Received: by 2002:a63:4917:: with SMTP id w23mr271248pga.344.1630616234252; Thu, 02 Sep 2021 13:57:14 -0700 (PDT) Received: from google.com (157.214.185.35.bc.googleusercontent.com. [35.185.214.157]) by smtp.gmail.com with ESMTPSA id x16sm3647924pgc.49.2021.09.02.13.57.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 02 Sep 2021 13:57:13 -0700 (PDT) Date: Thu, 2 Sep 2021 20:57:10 +0000 From: Sean Christopherson To: Vitaly Kuznetsov Cc: kvm@vger.kernel.org, Paolo Bonzini , Wanpeng Li , Jim Mattson , "Dr. David Alan Gilbert" , Nitesh Narayan Lal , Lai Jiangshan , Maxim Levitsky , Eduardo Habkost , linux-kernel@vger.kernel.org Subject: Re: [PATCH v4 3/8] KVM: x86: hyper-v: Avoid calling kvm_make_vcpus_request_mask() with vcpu_mask==NULL Message-ID: References: <20210827092516.1027264-1-vkuznets@redhat.com> <20210827092516.1027264-4-vkuznets@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210827092516.1027264-4-vkuznets@redhat.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Aug 27, 2021, Vitaly Kuznetsov wrote: > In preparation to making kvm_make_vcpus_request_mask() use for_each_set_bit() > switch kvm_hv_flush_tlb() to calling kvm_make_all_cpus_request() for 'all cpus' > case. > > Note: kvm_make_all_cpus_request() (unlike kvm_make_vcpus_request_mask()) > currently dynamically allocates cpumask on each call and this is suboptimal. > Both kvm_make_all_cpus_request() and kvm_make_vcpus_request_mask() are > going to be switched to using pre-allocated per-cpu masks. > > Signed-off-by: Vitaly Kuznetsov > --- Reviewed-by: Sean Christopherson