From patchwork Wed Dec 1 08:08:20 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Xin, Xiaohui" X-Patchwork-Id: 370291 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter1.kernel.org (8.14.4/8.14.3) with ESMTP id oB17nweR012230 for ; Wed, 1 Dec 2010 07:49:59 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754015Ab0LAHtg (ORCPT ); Wed, 1 Dec 2010 02:49:36 -0500 Received: from mga02.intel.com ([134.134.136.20]:19205 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753730Ab0LAHqi (ORCPT ); Wed, 1 Dec 2010 02:46:38 -0500 Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga101.jf.intel.com with ESMTP; 30 Nov 2010 23:46:37 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.59,282,1288594800"; d="scan'208";a="682672369" Received: from unknown (HELO localhost.localdomain.sh.intel.com) ([10.239.36.138]) by orsmga001.jf.intel.com with ESMTP; 30 Nov 2010 23:46:36 -0800 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: [PATCH v16 09/17] Don't do skb recycle, if device use external buffer. Date: Wed, 1 Dec 2010 16:08:20 +0800 Message-Id: X-Mailer: git-send-email 1.7.3 In-Reply-To: References: In-Reply-To: References: 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 (demeter1.kernel.org [140.211.167.41]); Wed, 01 Dec 2010 07:49:59 +0000 (UTC) diff --git a/net/core/skbuff.c b/net/core/skbuff.c index d3ece5c..11833b4 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -550,6 +550,12 @@ bool skb_recycle_check(struct sk_buff *skb, int skb_size) if (skb_shared(skb) || skb_cloned(skb)) return false; + /* 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);