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? | |
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
|  |