Andy Whitcroft 6babc32c41 mm: handle initialising compound pages at orders greater than MAX_ORDER ... When we initialise a compound page we initialise the page flags and head page pointer for all base pages spanned by that page. When we initialise a gigantic page (a page of order greater than or equal to MAX_ORDER) we have to initialise more than MAX_ORDER_NR_PAGES pages. Currently we assume that all elements of the mem_map in this page are contigious in memory. However this is only guarenteed out to MAX_ORDER_NR_PAGES pages, and with SPARSEMEM enabled they will not be contigious. This leads us to walk off the end of the first section and scribble on everything which follows, BAD. When we reach a MAX_ORDER_NR_PAGES boundary we much locate the next section of the mem_map. As gigantic pages can only be maximally aligned we know this will occur at exact multiple of MAX_ORDER_NR_PAGES pages from the start of the page. This is a bug fix for the gigantic page support in hugetlbfs. Credit to Mel Gorman for spotting the issue. Signed-off-by: Andy Whitcroft <apw@shadowen.org> Cc: Mel Gorman <mel@csn.ul.ie> Cc: Jon Tollefson <kniht@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2008-10-02 15:53:13 -07:00
..
allocpercpu.c
backing-dev.c
bootmem.c
bounce.c
dmapool.c
fadvise.c
filemap_xip.c
filemap.c	VFS: fix dio write returning EIO when try_to_release_page fails	2008-09-02 19:21:37 -07:00
fremap.c
highmem.c
hugetlb.c
internal.h
Kconfig
maccess.c
madvise.c
Makefile
memcontrol.c	mm owner: fix race between swapoff and exit	2008-09-29 08:41:47 -07:00
memory_hotplug.c
memory.c
mempolicy.c
mempool.c
migrate.c
mincore.c
mlock.c
mm_init.c
mmap.c	mmap: fix petty bug in anonymous shared mmap offset handling	2008-09-03 19:58:53 -07:00
mmu_notifier.c
mmzone.c	mm: mark the correct zone as full when scanning zonelists	2008-09-13 14:41:52 -07:00
mprotect.c
mremap.c
msync.c
nommu.c
oom_kill.c
page_alloc.c	mm: handle initialising compound pages at orders greater than MAX_ORDER	2008-10-02 15:53:13 -07:00
page_io.c
page_isolation.c	memory hotplug: missing zone->lock in test_pages_isolated()	2008-10-02 15:53:13 -07:00
page-writeback.c
pagewalk.c
pdflush.c
prio_tree.c
quicklist.c	mm: size of quicklists shouldn't be proportional to the number of CPUs	2008-09-02 19:21:38 -07:00
readahead.c
rmap.c
shmem_acl.c
shmem.c
slab.c
slob.c
slub.c	slub: fixed uninitialized counter in struct kmem_cache_node	2008-09-15 09:49:05 +03:00
sparse-vmemmap.c
sparse.c
swap_state.c
swap.c
swapfile.c
thrash.c
tiny-shmem.c	mm: tiny-shmem nommu fix	2008-10-02 15:53:13 -07:00
truncate.c	VFS: fix dio write returning EIO when try_to_release_page fails	2008-09-02 19:21:37 -07:00
util.c
vmalloc.c
vmscan.c
vmstat.c