Heiko Carstens 76cdd58e55 memory_hotplug: always initialize pageblock bitmap ... Trying to online a new memory section that was added via memory hotplug sometimes results in crashes when the new pages are added via __free_page. Reason for that is that the pageblock bitmap isn't initialized and hence contains random stuff. That means that get_pageblock_migratetype() returns also random stuff and therefore list_add(&page->lru, &zone->free_area[order].free_list[migratetype]); in __free_one_page() tries to do a list_add to something that isn't even necessarily a list. This happens since 86051ca5ea ("mm: fix usemap initialization") which makes sure that the pageblock bitmap gets only initialized for pages present in a zone. Unfortunately for hot-added memory the zones "grow" after the memmap and the pageblock memmap have been initialized. Which means that the new pages have an unitialized bitmap. To solve this the calls to grow_zone_span() and grow_pgdat_span() are moved to __add_zone() just before the initialization happens. The patch also moves the two functions since __add_zone() is the only caller and I didn't want to add a forward declaration. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Andy Whitcroft <apw@shadowen.org> Cc: Dave Hansen <haveblue@us.ibm.com> Cc: Gerald Schaefer <gerald.schaefer@de.ibm.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Yasunori Goto <y-goto@jp.fujitsu.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2008-05-14 19:11:15 -07:00
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allocpercpu.c
backing-dev.c
bootmem.c
bounce.c
dmapool.c
fadvise.c
filemap_xip.c
filemap.c	mm: fix infinite loop in filemap_fault	2008-05-14 19:11:13 -07:00
fremap.c
highmem.c
hugetlb.c
internal.h
Kconfig
maccess.c
madvise.c
Makefile
memcontrol.c
memory_hotplug.c	memory_hotplug: always initialize pageblock bitmap	2008-05-14 19:11:15 -07:00
memory.c	fix SMP data race in pagetable setup vs walking	2008-05-14 10:05:18 -07:00
mempolicy.c
mempool.c
migrate.c
mincore.c
mlock.c
mmap.c
mmzone.c
mprotect.c	mprotect: prevent alteration of the PAT bits	2008-05-14 19:11:15 -07:00
mremap.c
msync.c
nommu.c
oom_kill.c
page_alloc.c	memory_hotplug: always initialize pageblock bitmap	2008-05-14 19:11:15 -07:00
page_io.c
page_isolation.c
page-writeback.c
pagewalk.c
pdflush.c	mm/pdflush.c: merge the same code in two path	2008-05-13 08:02:24 -07:00
prio_tree.c
quicklist.c
readahead.c
rmap.c
shmem_acl.c
shmem.c
slab.c
slob.c
slub.c
sparse-vmemmap.c
sparse.c
swap_state.c
swap.c
swapfile.c
thrash.c
tiny-shmem.c
truncate.c
util.c
vmalloc.c
vmscan.c
vmstat.c