From: "H. Peter Anvin" <hpa@zytor.com>
To: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Stephen Hemminger <shemminger@linux-foundation.org>,
Johannes Berg <johannes@sipsolutions.net>,
dsd@gentoo.org, davem@davemloft.net, netdev@vger.kernel.org,
linux-wireless@vger.kernel.org
Subject: Re: wireless vs. alignment requirements
Date: Thu, 29 Nov 2007 09:50:35 -0800 [thread overview]
Message-ID: <474EFBEB.5000804@zytor.com> (raw)
In-Reply-To: <20071129131107.GC8487@gondor.apana.org.au>
Herbert Xu wrote:
> On Tue, Nov 27, 2007 at 09:16:07AM -0800, H. Peter Anvin wrote:
>> I wrote a patch for the IP stack to realign packets if necessary at one
>> point. I should dredge it up again and submit it for collective flamage.
>
> As long as it doesn't penalise Ethernet (e.g., the 10Gb crowd :) it would
> be good to have.
>
> Thanks,
Uhm, most cards affected *ARE* Ethernet cards, due to the bloody 14-byte
header.
But it doesn't affect architectures which have alignment, and the cost
of scanning a properly-aligned packet is minimal.
I'll try to find it some time today.
-hpa
next prev parent reply other threads:[~2007-11-29 17:51 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20071123000922.C44009D4A1F@zog.reactivated.net>
2007-11-23 20:33 ` wireless vs. alignment requirements Johannes Berg
2007-11-24 6:15 ` Herbert Xu
2007-11-24 8:33 ` Johannes Berg
2007-11-24 13:32 ` Herbert Xu
2007-11-24 13:49 ` Johannes Berg
2007-11-24 13:51 ` David Miller
2007-11-24 14:13 ` Herbert Xu
2007-11-24 20:11 ` Stephen Hemminger
2007-11-24 21:33 ` Johannes Berg
2007-11-25 1:08 ` Herbert Xu
2007-11-25 21:21 ` Stephen Hemminger
2007-11-26 1:38 ` Herbert Xu
2007-11-27 17:16 ` H. Peter Anvin
2007-11-27 17:16 ` H. Peter Anvin
2007-11-27 18:39 ` Stephen Hemminger
2007-11-28 2:42 ` H. Peter Anvin
2007-11-29 13:11 ` Herbert Xu
2007-11-29 17:50 ` H. Peter Anvin [this message]
2007-11-30 0:26 ` Herbert Xu
2007-11-30 0:28 ` H. Peter Anvin
2007-11-30 0:34 ` Herbert Xu
2007-11-30 0:41 ` H. Peter Anvin
2007-11-24 21:13 ` Johannes Berg
2007-11-25 1:44 ` Herbert Xu
2007-11-25 11:00 ` Johannes Berg
2007-11-25 11:22 ` Herbert Xu
2007-11-25 13:54 ` Johannes Berg
2007-11-25 14:01 ` Herbert Xu
2007-11-25 17:04 ` Johannes Berg
2007-11-26 1:36 ` Herbert Xu
2007-11-24 13:11 ` Ulrich Kunitz
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