On Tue, May 02, 2006 at 08:03:16AM -0700, Luck, Tony wrote: > + help > + The long format VHPT is an alternative hashed page table. Advantages > + of the long format VHPT are lower memory usage when there are a large > + number of processes in the system. > > Is this really true? Don't you still have all of the 3-level (or 4-level) > tree allocated to keep the machine independent code in mm/memory.c > happy in addition to the big block of memory that you are using on > each cpu for the LVHPT? Where is the saving? Yes that does seem a bit miss-leading. I guess the point was that with short format you dedicate the top areas of your region to page tables for each process, with long format it is static. -i - : send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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