From: David Miller <davem@davemloft.net>
To: eric.dumazet@gmail.com
Cc: edumazet@google.com, netdev@vger.kernel.org
Subject: Re: ipv4 gro receive IHL
Date: Tue, 23 Oct 2012 02:27:13 -0400 (EDT) [thread overview]
Message-ID: <20121023.022713.1744593948897349616.davem@davemloft.net> (raw)
In-Reply-To: <1350972094.8609.1420.camel@edumazet-glaptop>
From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Tue, 23 Oct 2012 08:01:34 +0200
> GRO on IPv4 only supports ihl = 5, this is tested in :
>
> if (*(u8 *)iph != 0x45)
> goto out_unlock;
>
> I also was planning to add some code to ip_fast_csum(addr, X) to have a
> fast path (no conditional jump) for the case where X is the constant 5
Oh indeed, thanks for clearing that up.
prev parent reply other threads:[~2012-10-23 6:27 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-23 3:46 ipv4 gro receive IHL David Miller
2012-10-23 6:01 ` Eric Dumazet
2012-10-23 6:27 ` David Miller [this message]
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