From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alan Ott Subject: [PATCH 4/6] mac802154: Increase tx_buffer_len Date: Tue, 2 Apr 2013 14:47:59 -0400 Message-ID: <1364928481-1813-5-git-send-email-alan@signal11.us> References: <1364928481-1813-1-git-send-email-alan@signal11.us> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: Alan Ott , netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-zigbee-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org To: Alexander Smirnov , Dmitry Eremin-Solenikov , "David S. Miller" Return-path: In-Reply-To: <1364928481-1813-1-git-send-email-alan-yzvJWuRpmD1zbRFIqnYvSA@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linux-zigbee-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: netdev.vger.kernel.org Increase the buffer length from 10 to 300 packets. Consider that traffic on mac802154 devices will often be 6LoWPAN, and a full-length (1280 octet) IPv6 packet will fragment into 15 6LoWPAN fragments (because the MTU of IEEE 802.15.4 is 127). A 300-packet queue is really 20 full-length IPv6 packets. With a queue length of 10, an entire IPv6 packet was unable to get queued at one time, causing fragments to be dropped, and making reassembly impossible. Signed-off-by: Alan Ott --- net/mac802154/wpan.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/mac802154/wpan.c b/net/mac802154/wpan.c index 7d3f659..2ca2f4d 100644 --- a/net/mac802154/wpan.c +++ b/net/mac802154/wpan.c @@ -360,7 +360,7 @@ void mac802154_wpan_setup(struct net_device *dev) dev->header_ops = &mac802154_header_ops; dev->needed_tailroom = 2; /* FCS */ dev->mtu = IEEE802154_MTU; - dev->tx_queue_len = 10; + dev->tx_queue_len = 300; dev->type = ARPHRD_IEEE802154; dev->flags = IFF_NOARP | IFF_BROADCAST; dev->watchdog_timeo = 0; -- 1.7.11.2 ------------------------------------------------------------------------------ Minimize network downtime and maximize team effectiveness. Reduce network management and security costs.Learn how to hire the most talented Cisco Certified professionals. Visit the Employer Resources Portal http://www.cisco.com/web/learning/employer_resources/index.html