Hi,
On 06/18/2018 09:59 AM, Mike Rapoport wrote:
> Signed-off-by: Mike Rapoport <rppt@xxxxxxxxxxxxxxxxxx>
> ---
> mm/bootmem.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 47 insertions(+)
>
> diff --git a/mm/bootmem.c b/mm/bootmem.c
> index 76fc17e..423cb5f 100644
> --- a/mm/bootmem.c
> +++ b/mm/bootmem.c
> @@ -21,6 +21,53 @@
>
> #include "internal.h"
>
> +/**
> + * DOC: bootmem overview
> + *
> + * Bootmem is a boot-time physical memory allocator and configurator.
> + *
> + * It is used early in the boot process before the page allocator is
> + * set up.
> + *
> + * The bootmem is based on the most basic of allocators, a First Fit
* Bootmem is based on
or
* The bootmem allocator is based on
> + * allocator which uses a bitmap to represent memory. If a bit is 1,
> + * the page is allocated and 0 if unallocated. To satisfy allocations
> + * of sizes smaller than a page, the allocator records the Page Frame
> + * Number (PFN) of the last allocation and the offset the allocation
> + * ended at. Subsequent small allocations are merged together and
> + * stored on the same page.
--
~Randy
