netdev - Re: [PATCH v3] net: Do not include padding in TCP GRO checksum

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Message-ID: <20131117031710.GA18254@gondor.apana.org.au>
Date:	Sun, 17 Nov 2013 11:17:11 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Alexander Duyck <alexander.duyck@...il.com>
Cc:	Alexander Duyck <alexander.h.duyck@...el.com>, davem@...emloft.net,
	netdev@...r.kernel.org, edumazet@...gle.com
Subject: Re: [PATCH v3] net: Do not include padding in TCP GRO checksum

On Sat, Nov 16, 2013 at 09:02:34AM -0800, Alexander Duyck wrote:
>
> That being the case though, why don't we set the flush flag on detecting
> a bad checksum and hand it off to tcp_gro_receive instead of returning
> NULL?  It seems like it would be in our interest to flush the flow and
> then report the bad checksum instead of keeping the flow and handing off
> the bad checksum to the stack.

Because if the TCP checksum is wrong then it may belong to a
different flow.

Cheers,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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