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=-17.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE, SPF_PASS autolearn=ham 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 ED9E6C07E95 for ; Wed, 7 Jul 2021 11:35:56 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 85FD96128D for ; Wed, 7 Jul 2021 11:35:56 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 85FD96128D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:45570 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1m15qN-0003KY-FP for qemu-devel@archiver.kernel.org; Wed, 07 Jul 2021 07:35:55 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:34954) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m15pD-0002AE-7o for qemu-devel@nongnu.org; Wed, 07 Jul 2021 07:34:43 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:55256) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m15pA-0006S1-NN for qemu-devel@nongnu.org; Wed, 07 Jul 2021 07:34:43 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1625657679; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=NAUUwTVkGfKI3yl2RsTlRev3vnZfIw9bfJ0gg/nD+EM=; b=KyUXuh10cSKqwyXEVUem6RMvGS7HJcl9jptM7c/aErp1lPAluaFZuK3wxS5F8/JasgGIAl Qlxny8JVXKc/3FPeKrEm9q65+onByX10Px3eGb7JP34o3AZLWDGaxX9E2lX+a1gkYeegcN OkSVMDlTUc/QmI+otehAhFIgkot06NA= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-536-PdRpLTShNyGBfcptAyKmrQ-1; Wed, 07 Jul 2021 07:34:38 -0400 X-MC-Unique: PdRpLTShNyGBfcptAyKmrQ-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id A26A2100C660 for ; Wed, 7 Jul 2021 11:34:37 +0000 (UTC) Received: from redhat.com (unknown [10.40.194.222]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 21D5310A33FA for ; Wed, 7 Jul 2021 11:34:36 +0000 (UTC) Date: Wed, 7 Jul 2021 13:34:34 +0200 From: Viktor Ashirov To: qemu-devel@nongnu.org Subject: Re: [PATCH] tcg: Move tb_phys_invalidate_count to tb_ctx (#457) Message-ID: References: <20210707035532.421820-1-richard.henderson@linaro.org> MIME-Version: 1.0 In-Reply-To: <20210707035532.421820-1-richard.henderson@linaro.org> X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=vashirov@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Received-SPF: pass client-ip=170.10.133.124; envelope-from=vashirov@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.439, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Tue, Jul 06, 2021 at 08:55:32PM -0700, Richard Henderson wrote: > We can call do_tb_phys_invalidate from an iocontext, which has > no per-thread tcg_ctx. Move this to tb_ctx, which is global. > The actual update still takes place with a lock held, so only > an atomic set is required, not an atomic increment. > > Resolves: https://gitlab.com/qemu-project/qemu/-/issues/457 > Signed-off-by: Richard Henderson Tested-by: Viktor Ashirov