Messages in this thread | | | Subject | Re: [PATCH 05/11] docs/mm: bootmem: add overview documentation | From | Randy Dunlap <> | Date | Mon, 18 Jun 2018 10:15:10 -0700 |
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Hi,
On 06/18/2018 09:59 AM, Mike Rapoport wrote: > Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com> > --- > 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
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