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Message-ID: <47A2B71A.4090203@davidnewall.com>
Date: Fri, 01 Feb 2008 16:37:22 +1030
From: David Newall <davidn@...idnewall.com>
To: David Miller <davem@...emloft.net>
CC: kaber@...sh.net, kadlec@...ckhole.kfki.hu,
jeff.chua.linux@...il.com, linux-kernel@...r.kernel.org,
ole@....pl, cups-bugs@...ysw.com, netfilter-devel@...r.kernel.org
Subject: Re: cups slow on linux-2.6.24
David Miller wrote:
> From: David Newall <davidn@...idnewall.com>
> Date: Fri, 01 Feb 2008 11:17:14 +1030
>
>
>> Patrick McHardy wrote:
>>
>>> Jozsef Kadlecsik wrote:
>>>
>>>> Strange, but there are a lot of incorrect checksum packets. How does
>>>> it come on the loopback interface?
>>>>
>>> Loopback doesn't perform full checksumming, so thats expected.
>>>
>> The question remains: How do loopback packets get incorrect checksum?
>> Where and how can they get corrupted?
>>
>
> There are zeros there, which is an incorrect checksum most
> of the time.
>
I'm not debating that checksums are wrong. The question was how and
where? It's not as if there are any unreliable communication paths in a
loopback interface, so it's surprising that they could be wrong. How? Where?
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