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bh=qY7O4pGgNjSeXJjJZlzCy8Si5MFdnbfXJ2kaWwM7tW0=; b=FGRuKjvNLiJvTy97UOysQZKWVEFUcUkAvysXuqpmZN/EBi5mbs+OIovx4GbLyw6EKzbCLp ksl91RuMV0VnPhclFR2avMVZzt46ySy0EQSU9h7laWVkl+NOA5Wk9cM7ygt0MH52E6XCUZ ElivF6Y5r/3aWuZr5OxEK+nC/2Gm0X0= X-MC-Unique: 2w-ZjDlwPkm8abTJ_B-HDw-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 01/29] accel/kvm/kvm-all: Refactor per-vcpu dirty ring reaping Date: Tue, 19 Jul 2022 18:01:53 +0100 Message-Id: <20220719170221.576190-2-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: 1658250894805100001 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) Reviewed-by: Peter Xu Message-Id: Signed-off-by: Dr. David Alan Gilbert --- 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 ed8b6b896e..ce989a68ff 100644 --- a/accel/kvm/kvm-all.c +++ b/accel/kvm/kvm-all.c @@ -757,17 +757,20 @@ 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) { @@ -788,7 +791,7 @@ 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 @@ -808,7 +811,7 @@ 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; @@ -855,7 +858,7 @@ 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 @@ -1399,7 +1402,7 @@ 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); } @@ -1471,7 +1474,7 @@ 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++; @@ -2967,7 +2970,7 @@ 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 2.36.1