Andrea Arcangeli 94fcc585fb thp: avoid breaking huge pmd invariants in case of vma_adjust failures ... An huge pmd can only be mapped if the corresponding 2M virtual range is fully contained in the vma. At times the VM calls split_vma twice, if the first split_vma succeeds and the second fail, the first split_vma remains in effect and it's not rolled back. For split_vma or vma_adjust to fail an allocation failure is needed so it's a very unlikely event (the out of memory killer would normally fire before any allocation failure is visible to kernel and userland and if an out of memory condition happens it's unlikely to happen exactly here). Nevertheless it's safer to ensure that no huge pmd can be left around if the vma is adjusted in a way that can't fit hugepages anymore at the new vm_start/vm_end address. Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2011-01-13 17:32:45 -08:00
..
backing-dev.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2010-10-26 17:58:44 -07:00
bootmem.c	x86, memblock: Replace e820_/_early string with memblock_	2010-08-27 11:13:47 -07:00
bounce.c	bounce: call flush_dcache_page() after bounce_copy_vec()	2010-09-09 18:57:25 -07:00
compaction.c	thp: transhuge isolate_migratepages()	2011-01-13 17:32:45 -08:00
debug-pagealloc.c	generic debug pagealloc	2009-04-01 08:59:13 -07:00
dmapool.c	mm: add a might_sleep_if() to dma_pool_alloc()	2010-10-26 16:52:08 -07:00
fadvise.c	readahead: introduce FMODE_RANDOM for POSIX_FADV_RANDOM	2010-03-06 11:26:25 -08:00
failslab.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
filemap_xip.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
filemap.c	mm: remove likely() from grab_cache_page_write_begin()	2011-01-13 17:32:36 -08:00
fremap.c	Avoid pgoff overflow in remap_file_pages	2010-09-25 09:34:58 -07:00
highmem.c	mm,x86: fix kmap_atomic_push vs ioremap_32.c	2010-10-27 18:03:05 -07:00
huge_memory.c	thp: avoid breaking huge pmd invariants in case of vma_adjust failures	2011-01-13 17:32:45 -08:00
hugetlb.c	thp: clear_copy_huge_page	2011-01-13 17:32:41 -08:00
hwpoison-inject.c	HWPOISON, hugetlb: support hwpoison injection for hugepage	2010-08-11 09:23:11 +02:00
init-mm.c	mm: provide init_mm mm_context initializer	2010-08-09 20:44:54 -07:00
internal.h	thp: transparent hugepage core	2011-01-13 17:32:42 -08:00
Kconfig	thp: select CONFIG_COMPACTION if TRANSPARENT_HUGEPAGE enabled	2011-01-13 17:32:45 -08:00
Kconfig.debug	trivial: improve help text for mm debug config options	2009-09-21 15:14:57 +02:00
kmemcheck.c	kmemcheck: Fix build errors due to missing slab.h	2010-03-30 22:02:32 +09:00
kmemleak-test.c	percpu: clean up percpu variable definitions	2009-06-24 15:13:48 +09:00
kmemleak.c	kmemleak: Fix typo in the comment	2010-08-08 21:57:23 +01:00
ksm.c	thp: skip transhuge pages in ksm for now	2011-01-13 17:32:43 -08:00
maccess.c	MN10300: Save frame pointer in thread_info struct rather than global var	2010-10-27 17:29:01 +01:00
madvise.c	thp: madvise(MADV_HUGEPAGE)	2011-01-13 17:32:42 -08:00
Makefile	thp: transparent hugepage core	2011-01-13 17:32:42 -08:00
memblock.c	memblock: Annotate memblock functions with __init_memblock	2010-10-11 16:00:52 -07:00
memcontrol.c	thp: transhuge-memcg: commit tail pages at charge	2011-01-13 17:32:43 -08:00
memory_hotplug.c	thp: remove PG_buddy	2011-01-13 17:32:43 -08:00
memory-failure.c	thp: split_huge_page paging	2011-01-13 17:32:41 -08:00
memory.c	thp: pmd_trans_huge migrate bugcheck	2011-01-13 17:32:42 -08:00
mempolicy.c	thp: add numa awareness to hugepage allocations	2011-01-13 17:32:45 -08:00
mempool.c	mm: remove broken 'kzalloc' mempool	2009-09-22 07:17:35 -07:00
migrate.c	thp: pmd_trans_huge migrate bugcheck	2011-01-13 17:32:42 -08:00
mincore.c	thp: mincore transparent hugepage support	2011-01-13 17:32:44 -08:00
mlock.c	mlock: do not hold mmap_sem for extended periods of time	2011-01-13 17:32:36 -08:00
mm_init.c	mm: mminit_loglevel cannot be __meminitdata anymore	2008-08-20 15:40:30 -07:00
mmap.c	thp: avoid breaking huge pmd invariants in case of vma_adjust failures	2011-01-13 17:32:45 -08:00
mmu_context.c	exit: fix oops in sync_mm_rss	2010-03-24 16:31:21 -07:00
mmu_notifier.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
mmzone.c	mm: page allocator: adjust the per-cpu counter threshold when memory is low	2011-01-13 17:32:31 -08:00
mprotect.c	thp: mprotect: transparent huge page support	2011-01-13 17:32:44 -08:00
mremap.c	thp: split_huge_page_mm/vma	2011-01-13 17:32:41 -08:00
msync.c	sanitize vfs_fsync calling conventions	2010-05-21 18:31:21 -04:00
nommu.c	mlock: do not hold mmap_sem for extended periods of time	2011-01-13 17:32:36 -08:00
oom_kill.c	oom: kill all threads sharing oom killed task's mm	2010-10-26 16:52:05 -07:00
page_alloc.c	thp: remove PG_buddy	2011-01-13 17:32:43 -08:00
page_cgroup.c	kmemleak: Annotate false positive in init_section_page_cgroup()	2010-07-19 11:54:14 +01:00
page_io.c	block: unify flags for struct bio and struct request	2010-08-07 18:20:39 +02:00
page_isolation.c	mm: page_isolation: codeclean fix comment and rm unneeded val init	2010-10-26 16:52:11 -07:00
page-writeback.c	writeback: avoid unnecessary determine_dirtyable_memory call	2011-01-13 17:32:38 -08:00
pagewalk.c	thp: split_huge_page_mm/vma	2011-01-13 17:32:41 -08:00
percpu-km.c	percpu: clear memory allocated with the km allocator	2010-10-02 10:28:42 +03:00
percpu-vm.c	mm: remove gfp mask from pcpu_get_vm_areas	2011-01-13 17:32:34 -08:00
percpu.c	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2011-01-13 10:05:56 -08:00
pgtable-generic.c	thp: add pmd mangling generic functions	2011-01-13 17:32:40 -08:00
prio_tree.c
quicklist.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
readahead.c	readahead.c: fix comment	2010-05-25 08:07:00 -07:00
rmap.c	thp: transparent hugepage vmstat	2011-01-13 17:32:43 -08:00
shmem.c	fs: icache RCU free inodes	2011-01-07 17:50:26 +11:00
slab.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6	2011-01-10 08:38:01 -08:00
slob.c	kernel: kmem_ptr_validate considered harmful	2011-01-07 17:50:16 +11:00
slub.c	mm: convert sprintf_symbol to %pS	2011-01-13 17:32:33 -08:00
sparse-vmemmap.c	tree-wide: fix comment/printk typos	2010-11-01 15:38:34 -04:00
sparse.c	thp: remove PG_buddy	2011-01-13 17:32:43 -08:00
swap_state.c	thp: split_huge_page paging	2011-01-13 17:32:41 -08:00
swap.c	thp: transparent hugepage core	2011-01-13 17:32:42 -08:00
swapfile.c	thp: split_huge_page paging	2011-01-13 17:32:41 -08:00
thrash.c	mm: pass mm to grab_swap_token	2009-06-23 12:50:05 -07:00
truncate.c	Call the filesystem back whenever a page is removed from the page cache	2010-12-02 09:55:21 -05:00
util.c	kernel: kmem_ptr_validate considered harmful	2011-01-07 17:50:16 +11:00
vmalloc.c	vmalloc: remove redundant unlikely()	2011-01-13 17:32:36 -08:00
vmscan.c	mm: kswapd: use the classzone idx that kswapd was using for sleeping_prematurely()	2011-01-13 17:32:37 -08:00
vmstat.c	thp: transparent hugepage vmstat	2011-01-13 17:32:43 -08:00