From patchwork Thu Jul 29 11:14:41 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Xin, Xiaohui" X-Patchwork-Id: 115099 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter.kernel.org (8.14.4/8.14.3) with ESMTP id o6TB5QqY015243 for ; Thu, 29 Jul 2010 11:06:03 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757244Ab0G2LE6 (ORCPT ); Thu, 29 Jul 2010 07:04:58 -0400 Received: from mga11.intel.com ([192.55.52.93]:58755 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756932Ab0G2LBa (ORCPT ); Thu, 29 Jul 2010 07:01:30 -0400 Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga102.fm.intel.com with ESMTP; 29 Jul 2010 03:59:22 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.55,279,1278313200"; d="scan'208";a="590877570" Received: from unknown (HELO localhost.localdomain) ([10.239.36.142]) by fmsmga002.fm.intel.com with ESMTP; 29 Jul 2010 04:00:40 -0700 From: xiaohui.xin@intel.com To: netdev@vger.kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, mst@redhat.com, mingo@elte.hu, davem@davemloft.net, herbert@gondor.hengli.com.au, jdike@linux.intel.com Cc: Xin Xiaohui Subject: [RFC PATCH v8 09/16] Don't do skb recycle, if device use external buffer. Date: Thu, 29 Jul 2010 19:14:41 +0800 Message-Id: <1280402088-5849-10-git-send-email-xiaohui.xin@intel.com> X-Mailer: git-send-email 1.5.4.4 In-Reply-To: <1280402088-5849-9-git-send-email-xiaohui.xin@intel.com> References: <1280402088-5849-1-git-send-email-xiaohui.xin@intel.com> <1280402088-5849-2-git-send-email-xiaohui.xin@intel.com> <1280402088-5849-3-git-send-email-xiaohui.xin@intel.com> <1280402088-5849-4-git-send-email-xiaohui.xin@intel.com> <1280402088-5849-5-git-send-email-xiaohui.xin@intel.com> <1280402088-5849-6-git-send-email-xiaohui.xin@intel.com> <1280402088-5849-7-git-send-email-xiaohui.xin@intel.com> <1280402088-5849-8-git-send-email-xiaohui.xin@intel.com> <1280402088-5849-9-git-send-email-xiaohui.xin@intel.com> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter.kernel.org [140.211.167.41]); Thu, 29 Jul 2010 11:06:03 +0000 (UTC) diff --git a/net/core/skbuff.c b/net/core/skbuff.c index bbf4707..9b156bb 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -565,6 +565,12 @@ int skb_recycle_check(struct sk_buff *skb, int skb_size) if (skb_shared(skb) || skb_cloned(skb)) return 0; + /* if the device wants to do mediate passthru, the skb may + * get external buffer, so don't recycle + */ + if (dev_is_mpassthru(skb->dev)) + return 0; + skb_release_head_state(skb); shinfo = skb_shinfo(skb); atomic_set(&shinfo->dataref, 1);