From: Cong Wang <amwang@redhat.com>
To: PJ Waskiewicz <peter.p.waskiewicz.jr@linux.intel.com>
Cc: netdev@vger.kernel.org, "David S. Miller" <davem@davemloft.net>
Subject: Re: Regression: too many packets with incorrect checksum
Date: Wed, 08 May 2013 20:22:23 +0800 [thread overview]
Message-ID: <1368015743.3115.12.camel@cr0> (raw)
In-Reply-To: <518A41CA.3030804@linux.intel.com>
On Wed, 2013-05-08 at 05:15 -0700, PJ Waskiewicz wrote:
> On 5/8/2013 4:51 AM, Cong Wang wrote:
> > Hi, all
> >
> > The latest -net tree has some regression, I saw too many packets with
> > incorrect checksum from tcpdump inside a KVM guest, see the bottom.
> > (firewall is turned off on both sides.)
> >
> > It seems this is not related with drivers, I tried virtio and e1000,
> > both have the same problem. And UDP has the problem too. But turning off
> > tx-checksum by `ethtool -K eth0 tx off` makes the problem disappear
> > (just turning off TSO or GSO doesn't make any difference).
> >
> > I can provide other information if you need.
>
> Reproduce on bare metal, non-KVM?
>
Sorry that I don't have env or time to test it on non-KVM, because my
kernel config is specific to KVM and kicks out all modules.
next prev parent reply other threads:[~2013-05-08 12:22 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-08 11:51 Regression: too many packets with incorrect checksum Cong Wang
2013-05-08 12:15 ` PJ Waskiewicz
2013-05-08 12:22 ` Cong Wang [this message]
2013-05-09 8:36 ` Cong Wang
2013-05-09 9:17 ` Cong Wang
2013-05-09 16:25 ` Rick Jones
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