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 <xiaohui.xin@intel.com>
Subject: [PATCH v16 09/17] Don't do skb recycle, if device use external buffer.
Date: Wed, 1 Dec 2010 16:08:20 +0800 [thread overview]
Message-ID: <bdfdfa415111ae265325af3c0e8fc5bfe68618cd.1291187695.git.xiaohui.xin@intel.com> (raw)
In-Reply-To: <fc6e95d63a2c62aaf77f8ded22fc43ccefcdbbff.1291187695.git.xiaohui.xin@intel.com>
In-Reply-To: <fc6e95d63a2c62aaf77f8ded22fc43ccefcdbbff.1291187695.git.xiaohui.xin@intel.com>
From: Xin Xiaohui <xiaohui.xin@intel.com>
Signed-off-by: Xin Xiaohui <xiaohui.xin@intel.com>
Signed-off-by: Zhao Yu <yzhao81new@gmail.com>
Reviewed-by: Jeff Dike <jdike@linux.intel.com>
---
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 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);
--
1.7.3
next prev parent reply other threads:[~2010-12-01 7:49 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-01 8:08 [PATCH v16 01/17] Add a new structure for skb buffer from external xiaohui.xin
2010-12-01 8:08 ` [PATCH v16 02/17]Add a new struct for device to manipulate external buffer xiaohui.xin
2010-12-10 20:36 ` David Miller
2010-12-01 8:08 ` [PATCH v16 03/17] Add a ndo_mp_port_prep pointer to net_device_ops xiaohui.xin
2010-12-10 20:36 ` David Miller
2010-12-01 8:08 ` [PATCH v16 04/17]Add a function make external buffer owner to query capability xiaohui.xin
2010-12-01 8:08 ` [PATCH v16 05/17] Add a function to indicate if device use external buffer xiaohui.xin
2010-12-01 8:08 ` [PATCH v16 06/17]move member destructor_arg before member dataref xiaohui.xin
2010-12-01 8:08 ` [PATCH v16 07/17]Modify netdev_alloc_page() to get external buffer xiaohui.xin
2010-12-01 8:08 ` [PATCH v16 08/17]Modify netdev_free_page() to release " xiaohui.xin
2010-12-01 8:08 ` xiaohui.xin [this message]
2010-12-01 8:08 ` [PATCH v16 10/17] If device is in zero-copy mode first, bonding will fail xiaohui.xin
2010-12-01 8:08 ` [PATCH v16 11/17]Add a hook to intercept external buffers from NIC driver xiaohui.xin
2010-12-01 9:38 ` Changli Gao
2010-12-01 8:08 ` [PATCH v16 12/17] Add header file for mp device xiaohui.xin
2010-12-01 8:08 ` [PATCH v16 13/17] Add mp(mediate passthru) device xiaohui.xin
2010-12-01 8:08 ` [PATCH v16 14/17]Add a kconfig entry and make entry for mp device xiaohui.xin
2010-12-01 17:53 ` Randy Dunlap
2010-12-02 1:32 ` Xin, Xiaohui
2010-12-01 8:08 ` [PATCH v16 15/17]Provides multiple submits and asynchronous notifications xiaohui.xin
2010-12-01 8:08 ` [PATCH v16 16/17]An example how to modifiy NIC driver to use napi_gro_frags() interface xiaohui.xin
2010-12-01 8:08 ` [PATCH v16 17/17]An example how to alloc user buffer based on " xiaohui.xin
2010-12-01 8:08 ` [PATCH v16 00/17] Provide a zero-copy method on KVM virtio-net xiaohui.xin
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