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4 accessed by a workload and which are idle. This information can be useful for
9 It is enabled by CONFIG_IDLE_PAGE_TRACKING=y.
17 bitmap is represented by an array of 8-byte integers, and the page at PFN #i is
24 the page by writing to the file. A value written to the file is OR-ed with the
40 That said, in order to estimate the amount of pages that are not used by a
43  1. Mark all the workload's pages as idle by setting corresponding bits in
44     /sys/kernel/mm/page_idle/bitmap. The pages can be found by reading
45     /proc/pid/pagemap if the workload is represented by a process, or by
64 set, or marked accessed explicitly by the kernel (see mark_page_accessed()). The
74  - a page is accessed by a device driver using get_user_pages()
80 is set manually, by writing to /sys/kernel/mm/page_idle/bitmap (see the USER API