From mboxrd@z Thu Jan 1 00:00:00 1970 From: xiaohui.xin@intel.com Subject: [RFC][PATCH v6 10/19] Don't do skb recycle, if device use external buffer. Date: Fri, 21 May 2010 17:30:26 +0800 Message-ID: <1274434235-5929-11-git-send-email-xiaohui.xin@intel.com> References: <1274434235-5929-1-git-send-email-xiaohui.xin@intel.com> <1274434235-5929-2-git-send-email-xiaohui.xin@intel.com> <1274434235-5929-3-git-send-email-xiaohui.xin@intel.com> <1274434235-5929-4-git-send-email-xiaohui.xin@intel.com> <1274434235-5929-5-git-send-email-xiaohui.xin@intel.com> <1274434235-5929-6-git-send-email-xiaohui.xin@intel.com> <1274434235-5929-7-git-send-email-xiaohui.xin@intel.com> <1274434235-5929-8-git-send-email-xiaohui.xin@intel.com> <1274434235-5929-9-git-send-email-xiaohui.xin@intel.com> <1274434235-5929-10-git-send-email-xiaohui.xin@intel.com> Cc: Xin Xiaohui To: netdev@vger.kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, mst@redhat.com, mingo@elte.hu, davem@davemloft.net, jdike@linux.intel.com Return-path: In-Reply-To: <1274434235-5929-10-git-send-email-xiaohui.xin@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org From: Xin Xiaohui Signed-off-by: Xin Xiaohui Signed-off-by: Zhao Yu Reviewed-by: Jeff Dike --- net/core/skbuff.c | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-) diff --git a/net/core/skbuff.c b/net/core/skbuff.c index 38d19d0..37587f0 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -553,6 +553,12 @@ 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); -- 1.5.4.4