netdev - Re: [TG3]: Fix performance regression on 5705.

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Message-Id: <20071015.021444.99184027.davem@davemloft.net>
Date:	Mon, 15 Oct 2007 02:14:44 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	mchan@...adcom.com
Cc:	netdev@...r.kernel.org, mcarlson@...adcom.com, andy@...yhouse.net
Subject: Re: [TG3]: Fix performance regression on 5705.

From: "Michael Chan" <mchan@...adcom.com>
Date: Fri, 12 Oct 2007 12:39:07 -0700

> [TG3]: Fix performance regression on 5705.
> 
> A performance regression was introduced by the following commit:
> 
>     commit ee6a99b539a50b4e9398938a0a6d37f8bf911550
>     Author: Michael Chan <mchan@...adcom.com>
>     Date:   Wed Jul 18 21:49:10 2007 -0700
> 
>     [TG3]: Fix msi issue with kexec/kdump.
> 
> In making that change, the PCI latency timer and cache line size
> registers were not restored after chip reset.  On the 5705, the
> latency timer gets reset to 0 during chip reset and this causes
> very poor performance.
> 
> Update version to 3.84.
> 
> Signed-off-by: Michael Chan <mchan@...adcom.com>

Applied, thanks Michael.

This might be what was causing the 5714 performance problems I was
seeing on one of my systems, I'll go check that out when I get a
chance.

Thanks again!
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