From: Andi Kleen <ak@suse.de>
To: Andreas Schwab <schwab@suse.de>
Cc: jonmason@us.ibm.com, cramerj@intel.com, netdev@oss.sgi.com,
netdev-bounce@oss.sgi.com
Subject: Re: Bad UDP checksum with 82540EM
Date: Sun, 8 Feb 2004 07:46:43 +0100 [thread overview]
Message-ID: <20040208074643.482ab4c7.ak@suse.de> (raw)
In-Reply-To: <je3c9mv7ea.fsf@sykes.suse.de>
On Sat, 07 Feb 2004 23:42:21 +0100
Andreas Schwab <schwab@suse.de> wrote:
> Jon D Mason <jonmason@us.ibm.com> writes:
>
> > This probably isn't helpful, but it sounds like a hardware error. Is the
> > error occurring on multiple/all HP adapters, or only one?
>
> I've also seen it with a HP branded BCM5701 on IA64, but also with a
> Broadcom BCM5702 on AMD64 (both using the tg3 driver). It seems like
> broken UDP checksumming is rather common. :-(
It could be still a software bug. When hardware checksumming is available
the UDP packets use a slightly different path through the stack.
Could you perhaps test if the problem occurs in a 32bit box with the
same NIC ? Maybe it is some 64bit problem somewhere in software.
-Andi
next prev parent reply other threads:[~2004-02-08 6:46 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-02-07 13:35 Bad UDP checksum with 82540EM Andreas Schwab
2004-02-07 21:37 ` Jon D Mason
2004-02-07 22:42 ` Andreas Schwab
2004-02-08 6:46 ` Andi Kleen [this message]
2004-02-08 13:09 ` Andreas Schwab
[not found] <101E0EB68A545748974019DC227C554007CBDD@orsmsx406.jf.intel.com>
2004-02-09 0:50 ` Andreas Schwab
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