Re: How to map high memory for block io

[Pierre Ossman <drzeus-list@drzeus.cx>]

Jens Axboe wrote:
> On Mon, Jan 30 2006, Pierre Ossman wrote:
>   
>> Jens Axboe wrote:
>>     
>>>
>>> Ah, you need to disable clustering to prevent that from happening! I was
>>> confused there for a while.
>>>
>>>   
>>>       
>> And which is the lesser evil, highmem bounce buffers or disabling
>> clustering? I'd probably vote for the former since the MMC overhead can
>> be quite large.
>>     
>
> Disabling clustering is by far the least expensive way to accomplish it.
>
>   

Russell, what's your view on this? And how should we handle it with
regard to MMC drivers?

Rgds
Pierre

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