Uttered "Steffen Persvold" <sp@scali.no>, spoke thus:
> Hi lkml readers,
>
> I have a question regarding drivers implementing the mmap and nopage methods.
> In some references I've read that pages in kernel allocated memory (either
> allocated with kmalloc, vmalloc or__get_free_pages) should be set to reserved
> (mem_map_reserve or set_bit(PG_reserved, page->flags) before they can be
> mmap'ed to guarantee that they can't be swapped out. Is this true ?
[kv]malloc memory is _never_ subject to paging and can be mmap'ed with a
vengeance without resorting to mucking about with marking pages or the like.
You're working too hard ;-)
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- + -- -- -- -- -- -- -- -- -- --
Tommy Reynolds | mailto: <reynolds@redhat.com>
Red Hat, Inc., Embedded Development Services | Phone: +1.256.704.9286
307 Wynn Drive NW, Huntsville, AL 35805 USA | FAX: +1.256.837.3839
Senior Software Developer | Mobile: +1.919.641.2923
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This archive was generated by hypermail 2b29 : Mon Jan 07 2002 - 21:00:26 EST