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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>		17 years ago
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Kconfig	PAGEFLAGS_EXTENDED and separate page flags for Head and Tail	17 years ago
Makefile	uaccess: add probe_kernel_write()	17 years ago
allocpercpu.c	cpumask: Cleanup more uses of CPU_MASK and NODE_MASK	17 years ago
backing-dev.c	mm: bdi: move statistics to debugfs	17 years ago
bootmem.c	memory hotplug: make alloc_bootmem_section()	17 years ago
bounce.c	block: Initial support for data-less (or empty) barrier support	17 years ago
dmapool.c	dmapool: enable debugging for CONFIG_SLUB_DEBUG_ON too	17 years ago
fadvise.c	xip: support non-struct page backed memory	17 years ago
filemap.c	mm: fix infinite loop in filemap_fault	17 years ago
filemap_xip.c	xip: support non-struct page backed memory	17 years ago
fremap.c	mm: fix various kernel-doc comments	17 years ago
highmem.c	mm: highmem kernel-doc additions	17 years ago
hugetlb.c	page allocator: explicitly retry hugepage allocations	17 years ago
internal.h	memory hotplug: free memmaps allocated by bootmem	17 years ago
maccess.c	kgdb: fix optional arch functions and probe_kernel_*	17 years ago
madvise.c	xip: support non-struct page backed memory	17 years ago
memcontrol.c	memcg: simple stats for memory resource controller	17 years ago
memory.c	fix SMP data race in pagetable setup vs walking	17 years ago
memory_hotplug.c	memory_hotplug: always initialize pageblock bitmap	17 years ago
mempolicy.c	mempolicy: use struct mempolicy pointer in shmem_sb_info	17 years ago
mempool.c	spelling fixes: mm/	17 years ago
migrate.c	mm: fix warning on memory offline	17 years ago
mincore.c	mm: remove nopage	17 years ago
mlock.c	…
mmap.c	procfs task exe symlink	17 years ago
mmzone.c	mm: filter based on a nodemask as well as a gfp_mask	17 years ago
mprotect.c	mprotect: prevent alteration of the PAT bits	17 years ago
mremap.c	sparse pointer use of zero as null	17 years ago
msync.c	…
nommu.c	procfs task exe symlink	17 years ago
oom_kill.c	oom_kill: remove unused parameter in badness()	17 years ago
page-writeback.c	mm: Add NR_WRITEBACK_TEMP counter	17 years ago
page_alloc.c	memory_hotplug: always initialize pageblock bitmap	17 years ago
page_io.c	mm: fix PageUptodate data race	17 years ago
page_isolation.c	memory hotremove: unset migrate type "ISOLATE" after removal	17 years ago
pagewalk.c	mm: fix possible off-by-one in walk_pte_range()	17 years ago
pdflush.c	mm/pdflush.c: merge the same code in two path	17 years ago
prio_tree.c	spelling fixes: mm/	17 years ago
quicklist.c	quicklists: Only consider memory that can be used with GFP_KERNEL	17 years ago
readahead.c	mm: bdi: export BDI attributes in sysfs	17 years ago
rmap.c	mm: remove nopage	17 years ago
shmem.c	mm: bdi: add separate writeback accounting capability	17 years ago
shmem_acl.c	…
slab.c	mm: remove remaining __FUNCTION__ occurrences	17 years ago
slob.c	slob: fix bug - when slob allocates "struct kmem_cache", it does not force alignment.	17 years ago
slub.c	slub: fix atomic usage in any_slab_objects()	17 years ago
sparse-vmemmap.c	NULL noise: fs/*, mm/*, kernel/*	17 years ago
sparse.c	revert "memory hotplug: allocate usemap on the section with pgdat"	17 years ago
swap.c	mm: rotate_reclaimable_page() cleanup	17 years ago
swap_state.c	mm: bdi: add separate writeback accounting capability	17 years ago
swapfile.c	mm: use non-racy method for /proc/swaps creation	17 years ago
thrash.c	…
tiny-shmem.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	17 years ago
truncate.c	fix invalidate_inode_pages2_range() to not clear ret	17 years ago
util.c	fix mm/util.c:krealloc()	17 years ago
vmalloc.c	docbook: fix vmalloc missing parameter notation	17 years ago
vmscan.c	mm: remove remaining __FUNCTION__ occurrences	17 years ago
vmstat.c	make vmstat cpu-unplug safe	17 years ago