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From: Plamen Petrov <pvp-lsts@fs.uni-ruse.bg>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	netdev@vger.kernel.org, bugzilla-daemon@bugzilla.kernel.org,
	bugme-daemon@bugzilla.kernel.org
Subject: Re: [Bugme-new] [Bug 16626] New: Machine hangs with EIP at skb_copy_and_csum_dev
Date: Fri, 20 Aug 2010 10:38:12 +0300	[thread overview]
Message-ID: <4C6E30E4.2040908@fs.uni-ruse.bg> (raw)
In-Reply-To: <1282286070.2295.6.camel@edumazet-laptop>

На 20.8.2010 г. 09:34, Eric Dumazet написа:
> Le vendredi 20 août 2010 à 09:26 +0300, Plamen Petrov a écrit :
>> Posting this only in the hope that it will be helpfull to the
>> "net guys"...
>
> Its a forwarding setup.
>
> Please post
>
> ifconfig -a
> iptables -nvL
> iptables -t nat -nvL
> iptables -t mangle -nvL
> ip route
> ethtool -k eth0   (&  eth1 ...)
>
> Try to disable gro ?
> ethtool -K eth0 gro off
> ethtool -K eth1 gro off
>
>
Sorry about this, but when I dig a bit into this, I found that
I had a pretty old ethtool:
> root@fs:~# ethtool --help
> ethtool version 5
> Usage:
> ethtool DEVNAME Display standard information about device
> ...

So my ethtool did not know anything about gro, because by
looking at
http://git.kernel.org/?p=network/ethtool/ethtool.git;a=shortlog
I saw I had this one:
2006-09-01	Jeff Garzik	Release version 5. origin v5
and gro reading/setting was added "a bit later"...
2009-03-06	Jeff Garzik	Get/set GRO settings.

So, I went on and compiled myself a new ethtool:
> root@fs:~# ethtool -h
> ethtool version 2.6.35
> Usage:
> ethtool DEVNAME Display standard information about device
> ...
And run it on my 2.6.34.4 kernel, which produced these:
>
root@fs:~# ethtool -k eth0
> Offload parameters for eth0:
> rx-checksumming: on
> tx-checksumming: on
> scatter-gather: on
> tcp-segmentation-offload: off
> udp-fragmentation-offload: off
> generic-segmentation-offload: on
> generic-receive-offload: off
> large-receive-offload: off
> ntuple-filters: off
> receive-hashing: off
root@fs:~# ethtool -k eth1
> Offload parameters for eth1:
> rx-checksumming: on
> tx-checksumming: on
> scatter-gather: on
> tcp-segmentation-offload: on
> udp-fragmentation-offload: off
> generic-segmentation-offload: on
> generic-receive-offload: off
> large-receive-offload: off
> ntuple-filters: off
> receive-hashing: off
root@fs:~# ethtool -k eth2
> Offload parameters for eth2:
> rx-checksumming: on
> tx-checksumming: on
> scatter-gather: on
> tcp-segmentation-offload: off
> udp-fragmentation-offload: off
> generic-segmentation-offload: on
> generic-receive-offload: off
> large-receive-offload: off
> ntuple-filters: off
> receive-hashing: off
root@fs:~#
>
But again, this is on 2.6.34.4. Could it be that
"generic-receive-offload" is ON by default on my
only gigabit capable tg3 card on 2.6.35.x and later?

I will try to determine this myself later, but the
machine is a gateway on the local area network, and
is needed from the user here...

Thanks!

  parent reply	other threads:[~2010-08-20  7:38 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <bug-16626-10286@https.bugzilla.kernel.org/>
2010-08-19 22:21 ` [Bugme-new] [Bug 16626] New: Machine hangs with EIP at skb_copy_and_csum_dev Andrew Morton
2010-08-20  5:03   ` Plamen Petrov
2010-08-20  5:11     ` Andrew Morton
2010-08-20  6:12       ` Plamen Petrov
2010-08-20  6:20         ` Andrew Morton
2010-08-20  6:26           ` Plamen Petrov
2010-08-20  6:34             ` Eric Dumazet
2010-08-20  6:57               ` Plamen Petrov
2010-08-20  7:38               ` Plamen Petrov [this message]
2010-08-20  8:31               ` Plamen Petrov
2010-08-20  9:19                 ` Plamen Petrov
2010-08-20 10:26                   ` Eric Dumazet
2010-08-20 10:53                     ` Plamen Petrov
2010-08-20 19:38                       ` Jarek Poplawski
2010-08-21  7:47                         ` Jarek Poplawski
2010-08-21  7:50                           ` Eric Dumazet
2010-08-21  8:07                             ` Jarek Poplawski
2010-08-23 11:47                               ` Plamen Petrov
2010-08-23 12:35                                 ` Eric Dumazet
2010-08-23 12:47                                 ` Jarek Poplawski
2010-08-23 13:00                                   ` Eric Dumazet
2010-08-23 13:10                                     ` Jarek Poplawski
2010-08-23 13:43                                       ` Plamen Petrov
2010-08-23 14:05                                         ` Plamen Petrov
2010-08-23 14:14                                           ` Jarek Poplawski
2010-08-24  4:51                                             ` Plamen Petrov
2010-08-24  5:01                                               ` Eric Dumazet
2010-08-24  8:43                                                 ` Plamen Petrov
2010-08-24 13:27                                                   ` Plamen Petrov
2010-08-24 15:08                                                     ` Eric Dumazet
2010-08-24 17:25                                                       ` Plamen Petrov
2010-08-24 18:22                                                         ` Jarek Poplawski
2010-08-24 19:19                                                         ` Eric Dumazet
2010-08-25  7:05                                                           ` Plamen Petrov
2010-08-29  7:48                                                             ` [PATCH] net: reset ip_summed in skb_tunnel_rx() Eric Dumazet
2010-08-29 15:35                                                               ` Jesse Gross
2010-08-27  8:44                                                       ` [Bugme-new] [Bug 16626] New: Machine hangs with EIP at skb_copy_and_csum_dev Plamen Petrov
2010-08-24  5:19                                               ` Plamen Petrov
2010-08-24  6:18                                                 ` Jarek Poplawski

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