b43 error under heavy load

Rafał Miłecki zajec5 at gmail.com
Sun Aug 14 16:54:20 EDT 2011

2011/8/14 Chris Vine <chris at cvine.freeserve.co.uk>:
> On Sun, 14 Aug 2011 13:11:12 +0200
> Rafał Miłecki <zajec5 at gmail.com> wrote:
>> 2011/8/14 Rafał Miłecki <zajec5 at gmail.com>:
>> > Hey Chris,
>> >
>> > 2011/6/1 Chris Vine <chris at cvine.freeserve.co.uk>:
>> >> Summary: Traffic sent up from the broadcom wireless device
>> >> generates copious reports of "Stopped TX ring 1" but always
>> >> carries on with its job and stays up, although its traffic is
>> >> slower than on received packets.  Received traffic on the other
>> >> hand reports no errors until the spate of "Out of order TX status
>> >> report on DMA ring 1" errors occurs, which seems to happen at
>> >> random (albeit accompanied on my failed transfer by a single
>> >> "Stopped TX ring 1" log entry), and when it does happen brings the
>> >> wireless link to a halt. Wireless traffic can be restarted simply
>> >> by reassociating with the AP.
>> >
>> > So it seems heavy load of RX can cause problems with TX. I just
>> > though of one another reason, could you test one more thing for me?
>> >
>> > Edit drivers/net/wireless/b43/dma.h and change define from value 64
>> > to in the line:
>> > #define B43_RXRING_SLOTS                64
>> I meant "to 8":
>> #define B43_RXRING_SLOTS                8
> It is not an improvement.  Different errors occur earlier (approx 100MB
> of download), upon which the wireless disassociates from the network.
> dmesg produces the output at the end of this post (with MAC addresses
> munged).

I didn't expect improvement, I tried to make it worse :P I though our
problems may be coming from not-fast-enough reading RX ring. So you
just made that ring even smaller to allow faster/easier errors.

What do you mean by different errors? The only one I can see is
"b43-phy0 ERROR: PHY transmission error". Do you mean that or
something else? Did you post all the log you wanted to? Maybe missed


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