On Mon, 2009-08-24 at 23:51 +0200, Toon Moene wrote: > [ I found this e-mail address while surfing http://linux-mm.org - > hope it's relevant. ] > > Is it possible to boot the Linux kernel in such a way as to *only* > enable "huge" pages ?
Possible, ever? Yes. But, it's not something that anyone has actually implemented in Linux or given that much thought to. If someone were to do this, they would probably have to take the existing pagetable code and basically shift everything down a level. Get rid of the pud level on x86_64, and collapse it into the pmd. Then, take the existing pmd pages, and use them like pte pages. Then, go and fix up all the places where a 2MB base page breaks x86 for random reasons, or where people assume that they need N pages instead of N*PAGE_SIZE bytes. It might be fun and entertaining, but it would be a lot of work. There are lots of little things that would break like the hard-coded 4k-page early boot pagetables. That's not even *considering* what it would do to userspace. Userspace would probably freak out pretty badly. -- Dave ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Libhugetlbfs-devel mailing list Libhugetlbfs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/libhugetlbfs-devel
