Messages in this thread | | | From | "Rafael J. Wysocki" <> | Subject | Re: PAE and PSE ?? | Date | Sun, 22 Oct 2006 12:15:26 +0200 |
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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
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