Messages in this thread | | | Subject | Re: kernel page size explanation | From | Nix <> | Date | Sun, 24 Jul 2005 22:28:59 +0100 |
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On Mon, 25 Jul 2005, VASM wrote: > i had one question > does the linux kernel support only one default page size even if the > processor on which it is working supports multiple ?
No. Some architectures have compile-time support for multiple different page sizes (e.g. Itanium, SPARC64); many have support for a (non-swappable) `large pages) system, and a filesystem backed by huge pages. (Often, the kernel is stored in huge pages, to keep the number of page table entries wasted by the nonswappable kernel to a minimum.)
What is *not* presently supported is using multiple page sizes to back userspace processes; that size is currently fixed at compile-time, even on architectures supporting multiple variably-sized pages.
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