Messages in this thread | | | Date | Mon, 21 Apr 2008 16:12:14 -0500 | From | Timur Tabi <> | Subject | Calling free_pages on part of the memory returned by get_free_pages? |
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According to LDD3, if I call get_free_pages() to allocate X bytes, I have to free all of those pages with free_pages(). The VM internals are a little bit over my head, but I looked at the code and I didn't see why that is a requirement.
For example, let's say I want to allocated 6MB of physically-contiguous memory. If I call x = get_free_pages(11) to get 8MB. What happens if I then do "free_pages(x + 6 * 1024 * 1024, 9)"?
I remember doing this on the 2.4 kernel, and it never gave me any problems.
-- Timur Tabi Linux kernel developer at Freescale
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