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Re: PCI fix for some platforms

from [Jeff Garzik] [Permanent Link][Original]
To: Andriy Korud <a.korud@xxxxxxxxxxxxx>
Subject: Re: PCI fix for some platforms
From: Jeff Garzik <jgarzik@xxxxxxxxx>
Date: Wed, 30 Jun 2004 05:01:41 -0400
Cc: netdev@xxxxxxxxxxx, prism54-private@xxxxxxxxxxx
In-reply-to: <80908CC5B2C9DB47AAF8C77892FCB44315F7C9@lion.vector.com.pl>
References: <80908CC5B2C9DB47AAF8C77892FCB44315F7C9@lion.vector.com.pl>
Sender: netdev-bounce@xxxxxxxxxxx
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.6) Gecko/20040510
Andriy Korud wrote: 
Hi,
i've noticed that on some platforms (noticed on PPC/XScale embedded) PCI cacheline size is not 
initialized properly and therefore card uses slow "PCI read memory" command instead of 
optimal "PCI read memory line", which cause serious bendwidth limitations in case of 3+ 
cards on single PCI bus.

Attached patch that fix this issue - please merge review. 


See pci_set_mwi()

        Jeff



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