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Re: [PATCH bk-2.6.10] tg3:align IP headers from 5701 in PCI-X mode

To: "David S. Miller" <davem@xxxxxxxxxxxxx>
Subject: Re: [PATCH bk-2.6.10] tg3:align IP headers from 5701 in PCI-X mode
From: Jeff Garzik <jgarzik@xxxxxxxxx>
Date: Mon, 10 Jan 2005 16:01:59 -0500
Cc: akepner@xxxxxxx, netdev@xxxxxxxxxxx
In-reply-to: <20050110125001.4fe4d00b.davem@xxxxxxxxxxxxx>
References: <Pine.LNX.4.33.0501031713460.16417-100000@xxxxxxxxxxxxxxxxxxxxx> <20050110125001.4fe4d00b.davem@xxxxxxxxxxxxx>
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David S. Miller wrote:
On Mon, 3 Jan 2005 17:45:01 -0800 (PST)
akepner@xxxxxxx wrote:


We still have customers using 5701 cards, and their syslogs fill with "kernel unaligned access" messages. They may also see a significant performance degradation due to the expense of unaligned accesses on ia64. Here's a patch to address this (it is almost the same as the patch which was discussed in http://marc.theaimsgroup.com/?l=linux-netdev&m=109770128816605&w=2).

In a quick throughput test, I found that this could improve throughput
by ~30% on an Altix.


Let's just do this all the time for this case, adding new config
options for stuff like this does nothing more than create confusion.


agreed.

        Jeff




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