From patchwork Mon Jul 13 09:12:33 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gleb Natapov X-Patchwork-Id: 35348 Received: from vger.kernel.org (vger.kernel.org [209.132.176.167]) by demeter.kernel.org (8.14.2/8.14.2) with ESMTP id n6D9CnFd020831 for ; Mon, 13 Jul 2009 09:12:50 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754853AbZGMJMq (ORCPT ); Mon, 13 Jul 2009 05:12:46 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754805AbZGMJMo (ORCPT ); Mon, 13 Jul 2009 05:12:44 -0400 Received: from mx2.redhat.com ([66.187.237.31]:35134 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754702AbZGMJMk (ORCPT ); Mon, 13 Jul 2009 05:12:40 -0400 Received: from int-mx2.corp.redhat.com (int-mx2.corp.redhat.com [172.16.27.26]) by mx2.redhat.com (8.13.8/8.13.8) with ESMTP id n6D9Cdid031649 for ; Mon, 13 Jul 2009 05:12:39 -0400 Received: from ns3.rdu.redhat.com (ns3.rdu.redhat.com [10.11.255.199]) by int-mx2.corp.redhat.com (8.13.1/8.13.1) with ESMTP id n6D9Ccub022390; Mon, 13 Jul 2009 05:12:38 -0400 Received: from dhcp-1-237.tlv.redhat.com (dhcp-1-237.tlv.redhat.com [10.35.1.237]) by ns3.rdu.redhat.com (8.13.8/8.13.8) with ESMTP id n6D9CaD5022203; Mon, 13 Jul 2009 05:12:37 -0400 Received: by dhcp-1-237.tlv.redhat.com (Postfix, from userid 13519) id E3ABA18D47C; Mon, 13 Jul 2009 12:12:35 +0300 (IDT) From: Gleb Natapov To: kvm@vger.kernel.org Cc: avi@redhat.com, mtosatti@redhat.com Subject: [PATCH 3/5] Move irq notifiers lists to its own locking. Date: Mon, 13 Jul 2009 12:12:33 +0300 Message-Id: <1247476355-27284-4-git-send-email-gleb@redhat.com> In-Reply-To: <1247476355-27284-1-git-send-email-gleb@redhat.com> References: <1247476355-27284-1-git-send-email-gleb@redhat.com> X-Scanned-By: MIMEDefang 2.58 on 172.16.27.26 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Signed-off-by: Gleb Natapov --- include/linux/kvm_host.h | 1 + virt/kvm/irq_comm.c | 16 ++++++++-------- virt/kvm/kvm_main.c | 1 + 3 files changed, 10 insertions(+), 8 deletions(-) diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 3f2a4fc..12f4ee2 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -165,6 +165,7 @@ struct kvm { spinlock_t irq_routing_lock; struct hlist_head mask_notifier_list; struct hlist_head irq_ack_notifier_list; + spinlock_t irq_notifier_list_lock; #endif #ifdef KVM_ARCH_WANT_MMU_NOTIFIER diff --git a/virt/kvm/irq_comm.c b/virt/kvm/irq_comm.c index 3dbba41..59c1cde 100644 --- a/virt/kvm/irq_comm.c +++ b/virt/kvm/irq_comm.c @@ -191,17 +191,17 @@ void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin) void kvm_register_irq_ack_notifier(struct kvm *kvm, struct kvm_irq_ack_notifier *kian) { - mutex_lock(&kvm->irq_lock); + spin_lock(&kvm->irq_notifier_list_lock); hlist_add_head_rcu(&kian->link, &kvm->irq_ack_notifier_list); - mutex_unlock(&kvm->irq_lock); + spin_unlock(&kvm->irq_notifier_list_lock); } void kvm_unregister_irq_ack_notifier(struct kvm *kvm, struct kvm_irq_ack_notifier *kian) { - mutex_lock(&kvm->irq_lock); + spin_lock(&kvm->irq_notifier_list_lock); hlist_del_init_rcu(&kian->link); - mutex_unlock(&kvm->irq_lock); + spin_unlock(&kvm->irq_notifier_list_lock); synchronize_rcu(); } @@ -247,18 +247,18 @@ void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id) void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq, struct kvm_irq_mask_notifier *kimn) { - mutex_lock(&kvm->irq_lock); + spin_lock(&kvm->irq_notifier_list_lock); kimn->irq = irq; hlist_add_head_rcu(&kimn->link, &kvm->mask_notifier_list); - mutex_unlock(&kvm->irq_lock); + spin_unlock(&kvm->irq_notifier_list_lock); } void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq, struct kvm_irq_mask_notifier *kimn) { - mutex_lock(&kvm->irq_lock); + spin_lock(&kvm->irq_notifier_list_lock); hlist_del_rcu(&kimn->link); - mutex_unlock(&kvm->irq_lock); + spin_unlock(&kvm->irq_notifier_list_lock); synchronize_rcu(); } diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 4e31634..018bde8 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -948,6 +948,7 @@ static struct kvm *kvm_create_vm(void) spin_lock_init(&kvm->irq_routing_lock); INIT_HLIST_HEAD(&kvm->mask_notifier_list); INIT_HLIST_HEAD(&kvm->irq_ack_notifier_list); + spin_lock_init(&kvm->irq_notifier_list_lock); #endif #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET