From nobody Mon Feb 9 11:51:10 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1644520753149498.1531587941879; Thu, 10 Feb 2022 11:19:13 -0800 (PST) Received: from localhost ([::1]:49832 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nIEyE-0007om-Kq for importer@patchew.org; Thu, 10 Feb 2022 14:19:12 -0500 Received: from eggs.gnu.org ([209.51.188.92]:32850) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nIBym-0003Gb-8Y for qemu-devel@nongnu.org; Thu, 10 Feb 2022 11:07:34 -0500 Received: from prt-mail.chinatelecom.cn ([42.123.76.222]:58956 helo=chinatelecom.cn) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nIByR-0006Xv-05 for qemu-devel@nongnu.org; Thu, 10 Feb 2022 11:07:15 -0500 Received: from clientip-171.223.98.151 (unknown [172.18.0.48]) by chinatelecom.cn (HERMES) with SMTP id 4ED5928009A; Fri, 11 Feb 2022 00:06:59 +0800 (CST) Received: from ([172.18.0.48]) by app0024 with ESMTP id 24e7ed15dd864d95b0675b7eb3fddc3b for qemu-devel@nongnu.org; Fri, 11 Feb 2022 00:07:05 CST HMM_SOURCE_IP: 172.18.0.48:41426.295907247 HMM_ATTACHE_NUM: 0000 HMM_SOURCE_TYPE: SMTP X-189-SAVE-TO-SEND: +huangy81@chinatelecom.cn X-Transaction-ID: 24e7ed15dd864d95b0675b7eb3fddc3b X-Real-From: huangy81@chinatelecom.cn X-Receive-IP: 172.18.0.48 X-MEDUSA-Status: 0 From: huangy81@chinatelecom.cn To: qemu-devel Subject: [PATCH V13 1/7] accel/kvm/kvm-all: Refactor per-vcpu dirty ring reaping Date: Fri, 11 Feb 2022 00:06:27 +0800 Message-Id: <5ed8d9ce7dd1ffaf413a6b225ddb0c851a3a35f9.1644508591.git.huangy81@chinatelecom.cn> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: References: In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable 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=42.123.76.222; envelope-from=huangy81@chinatelecom.cn; helo=chinatelecom.cn X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_PASS=-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: , Cc: Eduardo Habkost , David Hildenbrand , Hyman , Juan Quintela , Richard Henderson , Markus ArmBruster , Peter Xu , "Dr. David Alan Gilbert" , Paolo Bonzini , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZM-MESSAGEID: 1644520756601100001 From: Hyman Huang(=E9=BB=84=E5=8B=87) Add a non-required argument 'CPUState' to kvm_dirty_ring_reap so that it can cover single vcpu dirty-ring-reaping scenario. Signed-off-by: Hyman Huang(=E9=BB=84=E5=8B=87) --- accel/kvm/kvm-all.c | 23 +++++++++++++---------- 1 file changed, 13 insertions(+), 10 deletions(-) diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c index 0e66ebb..7b06b8a 100644 --- a/accel/kvm/kvm-all.c +++ b/accel/kvm/kvm-all.c @@ -756,17 +756,20 @@ static uint32_t kvm_dirty_ring_reap_one(KVMState *s, = CPUState *cpu) } =20 /* Must be with slots_lock held */ -static uint64_t kvm_dirty_ring_reap_locked(KVMState *s) +static uint64_t kvm_dirty_ring_reap_locked(KVMState *s, CPUState* cpu) { int ret; - CPUState *cpu; uint64_t total =3D 0; int64_t stamp; =20 stamp =3D get_clock(); =20 - CPU_FOREACH(cpu) { - total +=3D kvm_dirty_ring_reap_one(s, cpu); + if (cpu) { + total =3D kvm_dirty_ring_reap_one(s, cpu); + } else { + CPU_FOREACH(cpu) { + total +=3D kvm_dirty_ring_reap_one(s, cpu); + } } =20 if (total) { @@ -787,7 +790,7 @@ static uint64_t kvm_dirty_ring_reap_locked(KVMState *s) * Currently for simplicity, we must hold BQL before calling this. We can * consider to drop the BQL if we're clear with all the race conditions. */ -static uint64_t kvm_dirty_ring_reap(KVMState *s) +static uint64_t kvm_dirty_ring_reap(KVMState *s, CPUState *cpu) { uint64_t total; =20 @@ -807,7 +810,7 @@ static uint64_t kvm_dirty_ring_reap(KVMState *s) * reset below. */ kvm_slots_lock(); - total =3D kvm_dirty_ring_reap_locked(s); + total =3D kvm_dirty_ring_reap_locked(s, cpu); kvm_slots_unlock(); =20 return total; @@ -854,7 +857,7 @@ static void kvm_dirty_ring_flush(void) * vcpus out in a synchronous way. */ kvm_cpu_synchronize_kick_all(); - kvm_dirty_ring_reap(kvm_state); + kvm_dirty_ring_reap(kvm_state, NULL); trace_kvm_dirty_ring_flush(1); } =20 @@ -1398,7 +1401,7 @@ static void kvm_set_phys_mem(KVMMemoryListener *kml, * Not easy. Let's cross the fingers until it's fixed. */ if (kvm_state->kvm_dirty_ring_size) { - kvm_dirty_ring_reap_locked(kvm_state); + kvm_dirty_ring_reap_locked(kvm_state, NULL); } else { kvm_slot_get_dirty_log(kvm_state, mem); } @@ -1470,7 +1473,7 @@ static void *kvm_dirty_ring_reaper_thread(void *data) r->reaper_state =3D KVM_DIRTY_RING_REAPER_REAPING; =20 qemu_mutex_lock_iothread(); - kvm_dirty_ring_reap(s); + kvm_dirty_ring_reap(s, NULL); qemu_mutex_unlock_iothread(); =20 r->reaper_iteration++; @@ -2956,7 +2959,7 @@ int kvm_cpu_exec(CPUState *cpu) */ trace_kvm_dirty_ring_full(cpu->cpu_index); qemu_mutex_lock_iothread(); - kvm_dirty_ring_reap(kvm_state); + kvm_dirty_ring_reap(kvm_state, NULL); qemu_mutex_unlock_iothread(); ret =3D 0; break; --=20 1.8.3.1