On Sun, Mar 30, 2008 at 5:55 PM, Wu Yu <vestige.lug@xxxxxxxxx> wrote: > Hi all, > AFAIK, for IA-32 arch, two-level paging is sufficient. But the > positions of PUD and PMD > are kept. > In the book "Understanding the Linux Kernel, 3rd", it said that > kernel set the number of > the entries of PUD and PMD to 1 and mapping these two entries into the > proper entry of > the Page Global Directory. > I don't quite understand the word "mapping". Does that mean there > is one entry in PGD > for both PUD and PMD? What do they used for? I think the hardware only > knows there's > two-level paging, so whatever in the entry of PUD and PMD doesn't > matter to the hardware. > Am I right? > Could anyone give me some explain? I wanna look through the source > code of paging > mechanism, but don't know where to start. Some clues? > Thanks a lot! > > -- > Wu Yu > > -- > To unsubscribe from this list: send an email with > "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx > Please read the FAQ at http://kernelnewbies.org/FAQ > > Just to point to several resources: http://forum.kernelnewbies.org/list.php?13 ==> check out many of the similar posting. http://linux-mm.org/ ==> navigate here!!! http://linux-mm.org/VirtualMemory --> answer some of your questions. -- Regards, Peter Teoh -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
