From patchwork Tue Jul 28 14:52:52 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Igor Mammedov X-Patchwork-Id: 501275 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 32529140D25 for ; Wed, 29 Jul 2015 00:53:36 +1000 (AEST) Received: from localhost ([::1]:59015 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZK6G6-0001K3-3N for incoming@patchwork.ozlabs.org; Tue, 28 Jul 2015 10:53:34 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:45511) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZK6FZ-0000FV-6j for qemu-devel@nongnu.org; Tue, 28 Jul 2015 10:53:02 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZK6FY-0002Yi-3W for qemu-devel@nongnu.org; Tue, 28 Jul 2015 10:53:01 -0400 Received: from mx1.redhat.com ([209.132.183.28]:53220) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZK6FX-0002YQ-Un for qemu-devel@nongnu.org; Tue, 28 Jul 2015 10:53:00 -0400 Received: from int-mx14.intmail.prod.int.phx2.redhat.com (int-mx14.intmail.prod.int.phx2.redhat.com [10.5.11.27]) by mx1.redhat.com (Postfix) with ESMTPS id 8908E91FE3 for ; Tue, 28 Jul 2015 14:52:59 +0000 (UTC) Received: from dell-r430-03.lab.eng.brq.redhat.com (dell-r430-03.lab.eng.brq.redhat.com [10.34.112.60]) by int-mx14.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id t6SEqt5l026375; Tue, 28 Jul 2015 10:52:58 -0400 From: Igor Mammedov To: qemu-devel@nongnu.org Date: Tue, 28 Jul 2015 16:52:52 +0200 Message-Id: <1438095173-7417-4-git-send-email-imammedo@redhat.com> In-Reply-To: <1438095173-7417-1-git-send-email-imammedo@redhat.com> References: <1438095173-7417-1-git-send-email-imammedo@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.27 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 209.132.183.28 Cc: mst@redhat.com Subject: [Qemu-devel] [PATCH for-2.5 3/4] vhost: switch region lookup from linear to bsearch X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Signed-off-by: Igor Mammedov --- hw/virtio/vhost.c | 12 +++++------- 1 file changed, 5 insertions(+), 7 deletions(-) diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c index 8bef43e..5b8598b 100644 --- a/hw/virtio/vhost.c +++ b/hw/virtio/vhost.c @@ -420,13 +420,11 @@ static struct vhost_memory_region *vhost_dev_find_reg(struct vhost_dev *dev, uint64_t start_addr, uint64_t size) { - int i, n = dev->mem->nregions; - for (i = 0; i < n; ++i) { - struct vhost_memory_region *reg = dev->mem->regions + i; - if (ranges_overlap(reg->guest_phys_addr, reg->memory_size, - start_addr, size)) { - return reg; - } + int i = memory_range_bsearch(dev, start_addr), n = dev->mem->nregions; + struct vhost_memory_region *reg = dev->mem->regions + i; + if (i < n && ranges_overlap(reg->guest_phys_addr, reg->memory_size, + start_addr, size)) { + return reg; } return NULL; }