linux-kernel - Re: NETDEV WATCHDOG on U60/SMP

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Date:	Fri, 20 Jun 2008 12:19:32 +0200
From:	BERTRAND Joel <joel.bertrand@...tella.fr>
To:	Steffen Klassert <klassert@...hematik.tu-chemnitz.de>
CC:	linux-kernel@...r.kernel.org
Subject: Re: NETDEV WATCHDOG on U60/SMP

Steffen Klassert a écrit :
> On Fri, Jun 20, 2008 at 09:54:00AM +0200, BERTRAND Jo?l wrote:
>> 	Hello,
>>
>> 	This mail comes from sparclinux mailing list. I repost it on general 
>> linux kernel mailing list because I'm not sure that this bug is sparc 
>> specific. Nevertheless, I can only reproduce it on sparc64/SMP.
>>
>> 	My U60 runs linux debian with official 2.6.25 linux kernel (I'm
>> currently trying 2.6.25.7) and sometimes, when eth2 is stressed, eth2
>> hangs with NETDEV WATCHDOG :
>>
>> NETDEV WATCHDOG: eth2: transmit timed out
>> eth2: transmit timed out, tx_status 00 status 8601.
>>   diagnostics: net 0ccc media 8880 dma 0000003a fifo 0000
>> eth2: Interrupt posted but not delivered -- IRQ blocked by another device?
>>   Flags; bus-master 1, dirty 2283344(0) current 2283344(0)
>>   Transmit list 00000000 vs. fffff800af098200.
>>   0: @fffff800af098200  length 00000042 status 0c01059a
>>   1: @fffff800af098260  length 00000042 status 0c01059a
>>   2: @fffff800af0982c0  length 00000042 status 0c01059a
>>   3: @fffff800af098320  length 00000042 status 0c01059a
>>   4: @fffff800af098380  length 00000042 status 0c01059a
>>   5: @fffff800af0983e0  length 00000042 status 0c01059a
>>   6: @fffff800af098440  length 00000042 status 0c01059a
>>   7: @fffff800af0984a0  length 00000042 status 0c01059a
>>   8: @fffff800af098500  length 8000002a status 0001002a
>>   9: @fffff800af098560  length 8000002a status 0001002a
>>   10: @fffff800af0985c0  length 8000002a status 0001002a
>>   11: @fffff800af098620  length 8000002a status 0001002a
>>   12: @fffff800af098680  length 8000002a status 0001002a
>>   13: @fffff800af0986e0  length 8000002a status 0001002a
>>   14: @fffff800af098740  length 8000002a status 8001002a
>>   15: @fffff800af0987a0  length 8000002a status 8001002a
>> eth2: Resetting the Tx ring pointer.
>> eth2:  setting full-duplex.
> 
> Some people with similar problems reported, that they can workarround
> their problems by increasing the rx/tx ring sizes of the 3c59x driver.
> See http://bugzilla.kernel.org/show_bug.cgi?id=6444 for details.

	Thanks. I'm trying with RX/TX=256/256 and max_interrupt=1024.

	Regards,

	JKB
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