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    From"Rafael J. Wysocki" <>
    SubjectRe: PAE and PSE ??
    DateSun, 22 Oct 2006 12:15:26 +0200
    Hi,
    
    On Sunday, 22 October 2006 08:29, Sandeep Kumar wrote:
    > Hi all,
    > I have read in UTLK by bovet that the linux kernel does not uses the
    > PSE bit on an x86
    > machine. Then how come we have the hugetlbfs, which provides support
    > for 4MB pages ?
    
    AFAIK, PSE is only used when PAE is not set and then it enables the 4 MB
    pages.  If PAE is set, the 4 MB pages are impossible because there are only
    512 entries per page table, but 2 MB pages can be used instead (and you don't
    need to set PSE to use them).
    
    Greetings,
    Rafael
    
    
    -- 
    You never change things by fighting the existing reality.
    		R. Buckminster Fuller
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