RE: Write-combining

[Venkatesan, Ganesh]

lspci -vvv for your device should display the device specific BARs. If
you see the corresponding BAR in /proc/mtrr display it means that it is
MTRR mapped device memory.

Thanks,
ganesh 
 

-----Original Message-----
From: linux-kernel-owner@xxxxxxxxxxxxxxx
[mailto:linux-kernel-owner@xxxxxxxxxxxxxxx] On Behalf Of Thiago Robert
Sent: Tuesday, May 11, 2004 11:43 AM
To: Sean Neakums
Cc: linux-kernel@xxxxxxxxxxxxxxx
Subject: Re: Write-combining

Is anyone certain about this?

Thanks in advance.

_________________________
Thiago Robert


Sean Neakums wrote:

>Thiago Robert <robert@xxxxxxxxxxx> writes:
>
>  
>
>>Is the default behaviour of the Linux kernel to enable
>>write-combining? How can I be sure if it is enabled or not?
>>    
>>
>
>My /proc/mtrr lists the following region:
>
>reg03: base=0xf8000000 (3968MB), size=  64MB: write-combining, count=2
>
>which I am guessing is the PCI space, although I'm not certain.
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