On Wed, 2004-08-11 at 10:46 +0530, Ketan Mukadam wrote: > Does the get_free_pages(), allocate memory in terms of "order" or in terms > of "pages"? > To be more clear, can I precisely get 12(say) pages memory allocated or > will it always be in > power of two, so that even if I give a size of 12K , I get 16K ?? The source, let alone just the prototype, answers this. The second parameter is order. So 0 = 2^0 = 1 page, 1 = 2^1 = 2 pages, and so on. If you want precisely 12 pages, you need to roundup to the nearest power-of-two[1]. Or use get_free_page() to get 12 nonconsecutive pages. Or just use kmalloc(). Robert Love [1] Buy why would you want 12 pages? More likely you want that much memory. Don't wed yourself to PAGE_SIZE, instead just use kmalloc(). -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
