Re: bad DMAR interaction with iwlagn and SATA

[Johannes Berg]

On Tue, 2008-10-07 at 13:04 -0400, Kyle McMartin wrote:

> 2MB pages (and 4MB pages) are dependent on PSE/PAE, there's no configurable
> page size on x86 like there is on other platforms.
> 
> PSE gives you 4MB pages, PAE reduces your 4MB pages to 2MB pages (for
> extra flag and address bits.)
> 
> About the only useful places for these are large mappings like ioremap
> and whatnot.

Thanks for the explanation. Can you explain too why iwlwifi crashes when
I enable 64k pages? ;)

johannes

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