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Tue, 19 Jul 2022 13:02:37 -0400 Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-97-RRwv4bBoNTiTABIoGKI3Gg-1; Tue, 19 Jul 2022 13:02:30 -0400 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.rdu2.redhat.com [10.11.54.1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id C109D811E80; Tue, 19 Jul 2022 17:02:29 +0000 (UTC) Received: from dgilbert-t580.localhost (unknown [10.33.36.162]) by smtp.corp.redhat.com (Postfix) with ESMTP id CBE6640CFD0A; Tue, 19 Jul 2022 17:02:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1658250153; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=WKxOT9QkutZ1Un3AMJ7AFXf8KUpR9tvj3XlvFmqNzN4=; b=Y3eE0/rinh6mU+d5hufy3y0930ok0AbvjTBYt6CiKHkpNNH7yuh9gO9R8CuwZz7h8UVSnM NxYmiM6NZrpv/VkfbWQyAwy71hN3gerciViC3HPhnh71cfoMHyUzZWGoEF6103KYUxfaoK T2BiW0Ig7EI2HsrWIK/XhHZRHlZCfPI= X-MC-Unique: RRwv4bBoNTiTABIoGKI3Gg-1 From: "Dr. David Alan Gilbert (git)" To: qemu-devel@nongnu.org, leobras@redhat.com, quintela@redhat.com, berrange@redhat.com, peterx@redhat.com, iii@linux.ibm.com, huangy81@chinatelecom.cn Subject: [PULL 02/29] cpus: Introduce cpu_list_generation_id Date: Tue, 19 Jul 2022 18:01:54 +0100 Message-Id: <20220719170221.576190-3-dgilbert@redhat.com> In-Reply-To: <20220719170221.576190-1-dgilbert@redhat.com> References: <20220719170221.576190-1-dgilbert@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 2.84 on 10.11.54.1 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.129.124; envelope-from=dgilbert@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -28 X-Spam_score: -2.9 X-Spam_bar: -- X-Spam_report: (-2.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1658251160743100001 From: Hyman Huang(=E9=BB=84=E5=8B=87) Introduce cpu_list_generation_id to track cpu list generation so that cpu hotplug/unplug can be detected during measurement of dirty page rate. cpu_list_generation_id could be used to detect changes of cpu list, which is prepared for dirty page rate measurement. Signed-off-by: Hyman Huang(=E9=BB=84=E5=8B=87) Reviewed-by: Peter Xu Message-Id: <06e1f1362b2501a471dce796abb065b04f320fa5.1656177590.git.huangy= 81@chinatelecom.cn> Signed-off-by: Dr. David Alan Gilbert --- cpus-common.c | 8 ++++++++ include/exec/cpu-common.h | 1 + 2 files changed, 9 insertions(+) diff --git a/cpus-common.c b/cpus-common.c index db459b41ce..793364dc0e 100644 --- a/cpus-common.c +++ b/cpus-common.c @@ -73,6 +73,12 @@ static int cpu_get_free_index(void) } =20 CPUTailQ cpus =3D QTAILQ_HEAD_INITIALIZER(cpus); +static unsigned int cpu_list_generation_id; + +unsigned int cpu_list_generation_id_get(void) +{ + return cpu_list_generation_id; +} =20 void cpu_list_add(CPUState *cpu) { @@ -84,6 +90,7 @@ void cpu_list_add(CPUState *cpu) assert(!cpu_index_auto_assigned); } QTAILQ_INSERT_TAIL_RCU(&cpus, cpu, node); + cpu_list_generation_id++; } =20 void cpu_list_remove(CPUState *cpu) @@ -96,6 +103,7 @@ void cpu_list_remove(CPUState *cpu) =20 QTAILQ_REMOVE_RCU(&cpus, cpu, node); cpu->cpu_index =3D UNASSIGNED_CPU_INDEX; + cpu_list_generation_id++; } =20 CPUState *qemu_get_cpu(int index) diff --git a/include/exec/cpu-common.h b/include/exec/cpu-common.h index 5968551a05..2281be4e10 100644 --- a/include/exec/cpu-common.h +++ b/include/exec/cpu-common.h @@ -35,6 +35,7 @@ extern intptr_t qemu_host_page_mask; void qemu_init_cpu_list(void); void cpu_list_lock(void); void cpu_list_unlock(void); +unsigned int cpu_list_generation_id_get(void); =20 void tcg_flush_softmmu_tlb(CPUState *cs); =20 --=20 2.36.1