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| author | Jiang Liu | 2012-12-12 22:52:19 +0100 |
|---|---|---|
| committer | Linus Torvalds | 2012-12-13 02:38:35 +0100 |
| commit | 01cefaef40c48c714b7476e62781230993e10dbf (patch) | |
| tree | 9dc4b2db2a257e1f8a533511dbdfb585712bc380 /mm/shmem.c | |
| parent | fs/buffer.c: remove redundant initialization in alloc_page_buffers() (diff) | |
| download | kernel-qcow2-linux-01cefaef40c48c714b7476e62781230993e10dbf.tar.gz kernel-qcow2-linux-01cefaef40c48c714b7476e62781230993e10dbf.tar.xz kernel-qcow2-linux-01cefaef40c48c714b7476e62781230993e10dbf.zip | |
mm: provide more accurate estimation of pages occupied by memmap
If SPARSEMEM is enabled, it won't build page structures for non-existing
pages (holes) within a zone, so provide a more accurate estimation of
pages occupied by memmap if there are bigger holes within the zone.
And pages for highmem zones' memmap will be allocated from lowmem, so
charge nr_kernel_pages for that.
[akpm@linux-foundation.org: mark calc_memmap_size __paging_init]
Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Cc: Wen Congyang <wency@cn.fujitsu.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Maciej Rutecki <maciej.rutecki@gmail.com>
Cc: Chris Clayton <chris2553@googlemail.com>
Cc: "Rafael J . Wysocki" <rjw@sisk.pl>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Minchan Kim <minchan@kernel.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Michal Hocko <mhocko@suse.cz>
Tested-by: Jianguo Wu <wujianguo@huawei.com>
Cc: Dave Hansen <dave@linux.vnet.ibm.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/shmem.c')
0 files changed, 0 insertions, 0 deletions