Re: reduce size of pv_pte

[yamt%mwd.biglobe.ne.jp@localhost (YAMAMOTO Takashi)]

hi,

> On Fri, May 13, 2011 at 02:11:55AM +0000, YAMAMOTO Takashi wrote:
>> 
>> > Do all amd64 machines have only a few physical memory segments?
>> 
>> i don't think so.
>> linux folks put amazing efforts to speed up their PHYS_TO_VM_PAGE
>> equivalent for their big irons.
> 
> I remember something about linux defining physical memory in fixed
> size units (some number of MB) - which means you gt a lot of entries
> for a single large block of pysical memory.

iirc, linux has several alternative strategies to maintain physical memory
regions.  i guess what you remember is one of them and there is more suitable
one for a single-large-block style system.

YAMAMOTO Takashi

> 
>       David
> 
> -- 
> David Laight: david%l8s.co.uk@localhost