Naoya Horiguchi bcc5422230 mm: hugetlb: introduce page_huge_active ... We are not safe from calling isolate_huge_page() on a hugepage concurrently, which can make the victim hugepage in invalid state and results in BUG_ON(). The root problem of this is that we don't have any information on struct page (so easily accessible) about hugepages' activeness. Note that hugepages' activeness means just being linked to hstate->hugepage_activelist, which is not the same as normal pages' activeness represented by PageActive flag. Normal pages are isolated by isolate_lru_page() which prechecks PageLRU before isolation, so let's do similarly for hugetlb with a new paeg_huge_active(). set/clear_page_huge_active() should be called within hugetlb_lock. But hugetlb_cow() and hugetlb_no_page() don't do this, being justified because in these functions set_page_huge_active() is called right after the hugepage is allocated and no other thread tries to isolate it. [akpm@linux-foundation.org: s/PageHugeActive/page_huge_active/, make it return bool] [fengguang.wu@intel.com: set_page_huge_active() can be static] Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Hugh Dickins <hughd@google.com> Reviewed-by: Michal Hocko <mhocko@suse.cz> Cc: Mel Gorman <mgorman@suse.de> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: David Rientjes <rientjes@google.com> Signed-off-by: Fengguang Wu <fengguang.wu@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2015-04-15 16:35:19 -07:00
..
kasan	kasan, module, vmalloc: rework shadow allocation for modules	2015-03-12 18:46:08 -07:00
backing-dev.c	Merge branch 'lazytime' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2015-02-17 16:12:34 -08:00
balloon_compaction.c
bootmem.c
cleancache.c	cleancache: remove limit on the number of cleancache enabled filesystems	2015-04-14 16:49:03 -07:00
cma.c	mm: cma: constify and use correct signness in mm/cma.c	2015-04-14 16:49:04 -07:00
cma.h	mm: cma: allocation trigger	2015-04-14 16:49:00 -07:00
cma_debug.c	mm-cma-allocation-trigger-fix	2015-04-14 16:49:00 -07:00
compaction.c	mm/compaction: reset compaction scanner positions	2015-04-15 16:35:17 -07:00
debug-pagealloc.c
debug.c
dmapool.c
early_ioremap.c
fadvise.c	vfs: remove get_xip_mem	2015-02-16 17:56:03 -08:00
failslab.c
filemap.c	Merge branch 'akpm' (patches from Andrew)	2015-04-14 16:49:17 -07:00
frontswap.c
gup.c	mm: use READ_ONCE() for non-scalar types	2015-04-15 16:35:18 -07:00
highmem.c
huge_memory.c	thp: do not adjust zone water marks if khugepaged is not started	2015-04-15 16:35:19 -07:00
hugetlb.c	mm: hugetlb: introduce page_huge_active	2015-04-15 16:35:19 -07:00
hugetlb_cgroup.c
hwpoison-inject.c
init-mm.c
internal.h	mm: remove rest of ACCESS_ONCE() usages	2015-04-15 16:35:18 -07:00
interval_tree.c
Kconfig	mm: cma: debugfs interface	2015-04-14 16:49:00 -07:00
Kconfig.debug
kmemcheck.c
kmemleak-test.c
kmemleak.c	kmemleak: disable kasan instrumentation for kmemleak	2015-02-13 21:21:41 -08:00
ksm.c	mm: remove rest of ACCESS_ONCE() usages	2015-04-15 16:35:18 -07:00
list_lru.c	memcg: reparent list_lrus and free kmemcg_id on css offline	2015-02-12 18:54:10 -08:00
maccess.c
madvise.c	vfs: remove get_xip_mem	2015-02-16 17:56:03 -08:00
Makefile	mm: move memtest under mm	2015-04-14 16:49:06 -07:00
memblock.c	mm/memblock.c: rename local variable of memblock_type to `type'	2015-04-14 16:49:00 -07:00
memcontrol.c	mm: remove rest of ACCESS_ONCE() usages	2015-04-15 16:35:18 -07:00
memory-failure.c	mm: hugetlb: introduce page_huge_active	2015-04-15 16:35:19 -07:00
memory.c	mm: remove rest of ACCESS_ONCE() usages	2015-04-15 16:35:18 -07:00
memory_hotplug.c	mm, hotplug: fix concurrent memory hot-add deadlock	2015-04-14 16:49:00 -07:00
mempolicy.c	mm, thp: really limit transparent hugepage allocation to local node	2015-04-14 16:49:03 -07:00
mempool.c	mm, mempool: poison elements backed by slab allocator	2015-04-15 16:35:18 -07:00
memtest.c	memtest: use phys_addr_t for physical addresses	2015-04-14 16:49:06 -07:00
migrate.c	mm/migrate: check-before-clear PageSwapCache	2015-04-15 16:35:17 -07:00
mincore.c	mincore: apply page table walker on do_mincore()	2015-02-11 17:06:06 -08:00
mlock.c	mm: move mm_populate()-related code to mm/gup.c	2015-04-14 16:49:00 -07:00
mm_init.c	mm/mm_init.c: mark mminit_loglevel __meminitdata	2015-02-12 18:54:11 -08:00
mmap.c	mm/mmap.c: use while instead of if+goto	2015-04-15 16:35:19 -07:00
mmu_context.c
mmu_notifier.c
mmzone.c
mprotect.c	mm: numa: preserve PTE write permissions across a NUMA hinting fault	2015-03-25 16:20:31 -07:00
mremap.c	mm/mremap.c: clean up goto just return ERR_PTR	2015-04-15 16:35:18 -07:00
msync.c
nobootmem.c
nommu.c	mm/nommu.c: export symbol max_mapnr	2015-03-12 18:46:08 -07:00
oom_kill.c	mm/oom_kill.c: fix typo in comment	2015-04-15 16:35:16 -07:00
page-writeback.c	mm/page-writeback: check-before-clear PageReclaim	2015-04-15 16:35:17 -07:00
page_alloc.c	mm: remove rest of ACCESS_ONCE() usages	2015-04-15 16:35:18 -07:00
page_counter.c
page_ext.c
page_io.c	fs: move struct kiocb to fs.h	2015-03-25 20:28:11 -04:00
page_isolation.c	mm/page_alloc.c: call kernel_map_pages in unset_migrateype_isolate	2015-03-25 16:20:30 -07:00
page_owner.c	mm/page_owner.c: remove unnecessary stack_trace field	2015-02-11 17:06:07 -08:00
pagewalk.c	mm/pagewalk.c: prevent positive return value of walk_page_test() from being passed to callers	2015-03-25 16:20:30 -07:00
percpu-km.c
percpu-vm.c
percpu.c	percpu: Fix trivial typos in comments	2015-03-24 13:41:54 -04:00
pgtable-generic.c	mm: convert p[te|md]_mknonnuma and remaining page table manipulations	2015-02-12 18:54:08 -08:00
process_vm_access.c	process_vm_access: switch to {compat_,}import_iovec()	2015-04-11 22:27:12 -04:00
quicklist.c
readahead.c
rmap.c	mm: remove rest of ACCESS_ONCE() usages	2015-04-15 16:35:18 -07:00
shmem.c	Merge branch 'iocb' into for-next	2015-04-11 22:24:41 -04:00
slab.c	mm: remove GFP_THISNODE	2015-04-14 16:49:03 -07:00
slab.h	slub: make dead caches discard free slabs immediately	2015-02-12 18:54:10 -08:00
slab_common.c	mm: slub: add kernel address sanitizer support for slub allocator	2015-02-13 21:21:41 -08:00
slob.c	slob: make slob_alloc_node() static and remove EXPORT_SYMBOL()	2015-04-14 16:48:59 -07:00
slub.c	mm: remove rest of ACCESS_ONCE() usages	2015-04-15 16:35:18 -07:00
sparse-vmemmap.c
sparse.c
swap.c	mm: don't call __page_cache_release for hugetlb	2015-04-15 16:35:19 -07:00
swap_cgroup.c
swap_state.c	mm: remove rest of ACCESS_ONCE() usages	2015-04-15 16:35:18 -07:00
swapfile.c	mm: remove rest of ACCESS_ONCE() usages	2015-04-15 16:35:18 -07:00
truncate.c	mm: rename deactivate_page to deactivate_file_page	2015-04-15 16:35:17 -07:00
util.c	mm/util: add kstrdup_const	2015-02-13 21:21:35 -08:00
vmacache.c
vmalloc.c	mm/vmalloc: get rid of dirty bitmap inside vmap_block structure	2015-04-15 16:35:18 -07:00
vmpressure.c
vmscan.c	Merge branch 'akpm' (patches from Andrew)	2015-02-12 18:54:28 -08:00
vmstat.c	vmstat: Reduce time interval to stat update on idle cpu	2015-02-11 17:06:07 -08:00
workingset.c	list_lru: add helpers to isolate items	2015-02-12 18:54:10 -08:00
zbud.c	mm/zpool: add name argument to create zpool	2015-02-12 18:54:12 -08:00
zpool.c	mm/zpool: add name argument to create zpool	2015-02-12 18:54:12 -08:00
zsmalloc.c	mm/zsmalloc: add statistics support	2015-02-12 18:54:12 -08:00
zswap.c	mm/zpool: add name argument to create zpool	2015-02-12 18:54:12 -08:00