mm: fix memmap init for handling memory hole
commitcc2559bccc72767cb446f79b071d96c30c26439b
authorKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Wed, 18 Feb 2009 22:48:33 +0000 (18 14:48 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 18 Feb 2009 23:37:55 +0000 (18 15:37 -0800)
treeaacdeee5368e0eef72ed1d7a7cbd7e6ee4837941
parentf2dbcfa738368c8a40d4a5f0b65dc9879577cb21
mm: fix memmap init for handling memory hole

Now, early_pfn_in_nid(PFN, NID) may returns false if PFN is a hole.
and memmap initialization was not done. This was a trouble for
sparc boot.

To fix this, the PFN should be initialized and marked as PG_reserved.
This patch changes early_pfn_in_nid() return true if PFN is a hole.

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Reported-by: David Miller <davem@davemlloft.net>
Tested-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: <stable@kernel.org> [2.6.25.x, 2.6.26.x, 2.6.27.x, 2.6.28.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
arch/ia64/mm/numa.c
include/linux/mmzone.h
mm/page_alloc.c