From: Alan Ott <alan@signal11.us>
To: Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>,
"David S. Miller" <davem@davemloft.net>,
linux-zigbee-devel <linux-zigbee-devel@lists.sourceforge.net>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/6] mac802154: Immediately retry sending failed packets
Date: Tue, 02 Apr 2013 18:35:32 -0400 [thread overview]
Message-ID: <515B5D34.4000407@signal11.us> (raw)
In-Reply-To: <515B4D79.40805@signal11.us>
On 04/02/2013 05:28 PM, Alan Ott wrote:
> According to 7.5.6.5 of IEEE 802.15.4-2003, if the retransmission fails
> more than aMaxFrameRetries (3) times, it is assumed that it has failed.
> Since some transceivers (and I would assume most if not all) do this in
> hardware, it's now my opinion that we should _not_ try to retransmit at
> all in mac802154/tx.c.
>
> For a driver for a device which _doesn't_ do retransmission in hardware,
> maybe it should be handled by that driver then.
It's worth noting that the mrf24j40, the at86rf230, and the cc2420
support retransmission in hardware (the first two are the only two in
mainline).
Alan.
WARNING: multiple messages have this Message-ID (diff)
From: Alan Ott <alan-yzvJWuRpmD1zbRFIqnYvSA@public.gmane.org>
To: Alexander Smirnov
<alex.bluesman.smirnov-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
"David S. Miller" <davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>,
linux-zigbee-devel
<linux-zigbee-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org>,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH 1/6] mac802154: Immediately retry sending failed packets
Date: Tue, 02 Apr 2013 18:35:32 -0400 [thread overview]
Message-ID: <515B5D34.4000407@signal11.us> (raw)
In-Reply-To: <515B4D79.40805-yzvJWuRpmD1zbRFIqnYvSA@public.gmane.org>
On 04/02/2013 05:28 PM, Alan Ott wrote:
> According to 7.5.6.5 of IEEE 802.15.4-2003, if the retransmission fails
> more than aMaxFrameRetries (3) times, it is assumed that it has failed.
> Since some transceivers (and I would assume most if not all) do this in
> hardware, it's now my opinion that we should _not_ try to retransmit at
> all in mac802154/tx.c.
>
> For a driver for a device which _doesn't_ do retransmission in hardware,
> maybe it should be handled by that driver then.
It's worth noting that the mrf24j40, the at86rf230, and the cc2420
support retransmission in hardware (the first two are the only two in
mainline).
Alan.
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next prev parent reply other threads:[~2013-04-02 22:35 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-02 18:47 [PATCH 0/6] 802.15.4 and 6LoWPAN Buffering Fixes Alan Ott
2013-04-02 18:47 ` Alan Ott
2013-04-02 18:47 ` [PATCH 1/6] mac802154: Immediately retry sending failed packets Alan Ott
2013-04-02 18:47 ` Alan Ott
[not found] ` <1364928481-1813-2-git-send-email-alan-yzvJWuRpmD1zbRFIqnYvSA@public.gmane.org>
2013-04-02 19:11 ` Alexander Smirnov
2013-04-02 20:28 ` Alan Ott
2013-04-02 20:28 ` Alan Ott
2013-04-02 21:28 ` Alan Ott
2013-04-02 22:35 ` Alan Ott [this message]
2013-04-02 22:35 ` Alan Ott
2013-04-02 23:13 ` [Linux-zigbee-devel] " Werner Almesberger
2013-04-02 23:13 ` Werner Almesberger
2013-04-03 1:24 ` [Linux-zigbee-devel] " Alan Ott
2013-04-03 1:24 ` Alan Ott
2013-04-03 1:56 ` [Linux-zigbee-devel] " David Miller
2013-04-03 1:59 ` Alan Ott
2013-04-03 1:59 ` Alan Ott
2013-04-03 2:03 ` [Linux-zigbee-devel] " David Miller
2013-04-03 2:03 ` David Miller
2013-04-03 2:25 ` [Linux-zigbee-devel] " Alan Ott
2013-04-03 2:25 ` Alan Ott
2013-04-03 2:30 ` [Linux-zigbee-devel] " David Miller
2013-04-03 2:30 ` David Miller
2013-04-03 2:57 ` [Linux-zigbee-devel] " Alan Ott
2013-04-03 2:38 ` Werner Almesberger
2013-04-02 18:47 ` [PATCH 2/6] mac802154: Move xmit_attemps to stack Alan Ott
2013-04-02 18:47 ` Alan Ott
2013-04-02 18:47 ` [PATCH 3/6] mac802154: Use netif flow control Alan Ott
2013-04-02 18:47 ` Alan Ott
2013-04-02 21:21 ` Sergei Shtylyov
2013-04-02 18:47 ` [PATCH 4/6] mac802154: Increase tx_buffer_len Alan Ott
2013-04-02 18:47 ` Alan Ott
2013-04-02 18:48 ` [PATCH 5/6] 6lowpan: handle dev_queue_xmit error code properly Alan Ott
2013-04-02 18:48 ` Alan Ott
[not found] ` <1364928481-1813-6-git-send-email-alan-yzvJWuRpmD1zbRFIqnYvSA@public.gmane.org>
2013-04-02 19:21 ` Alexander Smirnov
[not found] ` <CAJmB2rB+9-gLV=SVvr4JUc2swjmTaWxD0gYM5VLw8PL1d455JA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-04-02 19:30 ` Alan Ott
2013-04-02 18:48 ` [PATCH 6/6] 6lowpan: return the dev_queue_xmit() return value from lowpan_xmit() Alan Ott
2013-04-02 18:48 ` Alan Ott
[not found] ` <1364928481-1813-7-git-send-email-alan-yzvJWuRpmD1zbRFIqnYvSA@public.gmane.org>
2013-04-02 19:27 ` Alexander Smirnov
2013-04-03 14:00 ` [PATCH v2 0/4] 802.15.4 and 6LoWPAN Buffering Fixes Alan Ott
2013-04-03 14:00 ` Alan Ott
2013-04-03 14:00 ` [PATCH v2 1/4] mac802154: Do not try to resend failed packets Alan Ott
2013-04-03 14:00 ` [PATCH v2 2/4] mac802154: Use netif flow control Alan Ott
2013-04-03 14:00 ` Alan Ott
2013-04-03 14:00 ` [PATCH v2 3/4] mac802154: Increase tx_buffer_len Alan Ott
2013-04-03 14:00 ` Alan Ott
2013-04-03 14:00 ` [PATCH v2 4/4] 6lowpan: handle dev_queue_xmit() error code properly Alan Ott
2013-04-03 14:00 ` Alan Ott
2013-04-07 21:06 ` [PATCH v2 0/4] 802.15.4 and 6LoWPAN Buffering Fixes David Miller
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