Subject: Re: [e1000 debug] KERNEL: assertion (!sk_forward_alloc) failed...

From: "JaniD++" <[email-masked]>
Date: Fri, 31 Mar 2006 14:45:24 +0200

----- Original Message ----- 
From: "Boris B. Zhmurov" <[email-masked]>
To: "Herbert Xu" <[email-masked]>
Cc: "David S. Miller" <[email-masked]>; <[email-masked]>;
<[email-masked]>; <[email-masked]>; <[email-masked]>;
<[email-masked]>; <[email-masked]>; <[email-masked]>;
<[email-masked]>; <[email-masked]>; <[email-masked]>;
<[email-masked]>; <[email-masked]>;
<[email-masked]>; "Andi Kleen" <[email-masked]>; "Jeff
Garzik" <[email-masked]>
Sent: Friday, March 31, 2006 2:07 PM
Subject: Re: [e1000 debug] KERNEL: assertion (!sk_forward_alloc) failed...

> Hello, Herbert Xu.
>
> On 31.03.2006 14:39 you said the following:
>
> > On Fri, Mar 31, 2006 at 02:16:38PM +0400, Boris B. Zhmurov wrote:
> >
> >>And xdelta tells, that e1000.ko was modified :)
> >
> >
> > Thanks for checking again.
> >
> > Anyway, it didn't take long to find another bug in the same area.
> > I'm afraid this driver does seem to be full of them :)
> >
> > It sets last_tx_tso in between computing the number of descriptors and
> > calling e1000_tx_map.  This is bad because e1000_tx_map gets the wrong
> > value for last_tx_tso and therefore may corrupt memory for every TSO
> > packet when the ring is almost full.
> >
> > This bug exists on UP as well as SMP.
> >
> > Signed-off-by: Herbert Xu <[email-masked]>
> >
> > Please try this in conjunction with the previous patch.
> >
> > Cheers,
>
>
> David, Herbert - FYI. One of my colleague confirmed, that idea "bug
> reproducible only if there is more then one e1000 adapter onboard" is
> true. He has a 3 servers with double intel pro 1000 adapters, and that
> bug occurs. Also, he has 4 servers with double intel pro 1000 adapters
> onboard, but _only one_ of them is up. And there is no such messages in
> dmesg at all! Inetresting...

This is not an unique thing!

Only _one_ of my 2 equal NIC get this message

NETDEV WATCHDOG: eth0: transmit timed out
e1000: eth0: e1000_watchdog_task: NIC Link is Up 1000 Mbps Full Duplex

with the old 2.6.15.* e1000 driver!

Not the all e1000 chips ar really equal with the same P/N Number!

This can be hardware based problem, and needs workaround?

Cheers,

>
> -- 
> Boris B. Zhmurov
> mailto: [email-masked]
> "wget http://kernelpanic.ru/bb_public_key.pgp -O - | gpg --import"
>
>  _____________ NOD32 1.584 (20031220) Információ _____________
>
> Az üzenetet a NOD32 Antivirus System megvizsgálta.
> http://www.nod32.hu
>
>

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