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

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Message-ID: <20080620085236.GA2376@bayes.mathematik.tu-chemnitz.de>
Date:	Fri, 20 Jun 2008 10:52:36 +0200
From:	Steffen Klassert <klassert@...hematik.tu-chemnitz.de>
To:	mt@...tella.fr, linux-kernel@...r.kernel.org
Subject: Re: NETDEV WATCHDOG on U60/SMP

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.

Would be good to know whether this helps for your problem too.

Steffen

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