Will Deacon 721c21c17a mm: mmu_gather: use tlb->end != 0 only for TLB invalidation ... When batching up address ranges for TLB invalidation, we check tlb->end != 0 to indicate that some pages have actually been unmapped. As of commit f045bbb9fa ("mmu_gather: fix over-eager tlb_flush_mmu_free() calling"), we use the same check for freeing these pages in order to avoid a performance regression where we call free_pages_and_swap_cache even when no pages are actually queued up. Unfortunately, the range could have been reset (tlb->end = 0) by tlb_end_vma, which has been shown to cause memory leaks on arm64. Furthermore, investigation into these leaks revealed that the fullmm case on task exit no longer invalidates the TLB, by virtue of tlb->end == 0 (in 3.18, need_flush would have been set). This patch resolves the problem by reverting commit f045bbb9fa, using instead tlb->local.nr as the predicate for page freeing in tlb_flush_mmu_free and ensuring that tlb->end is initialised to a non-zero value in the fullmm case. Tested-by: Mark Langsdorf <mlangsdo@redhat.com> Tested-by: Dave Hansen <dave@sr71.net> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2015-01-13 15:20:40 +13:00
..
backing-dev.c
balloon_compaction.c
bootmem.c
cleancache.c
cma.c	mm: cma: split cma-reserved in dmesg log	2014-12-18 19:08:10 -08:00
compaction.c	mm, compaction: more focused lru and pcplists draining	2014-12-10 17:41:06 -08:00
debug-pagealloc.c	mm/debug-pagealloc: make debug-pagealloc boottime configurable	2014-12-13 12:42:48 -08:00
debug.c	mm: move page->mem_cgroup bad page handling into generic code	2014-12-10 17:41:09 -08:00
dmapool.c
early_ioremap.c
fadvise.c	mm: fadvise: document the fadvise(FADV_DONTNEED) behaviour for partial pages	2014-12-13 12:42:49 -08:00
failslab.c
filemap.c	mm: get rid of radix tree gfp mask for pagecache_get_page	2014-12-29 12:45:45 -08:00
filemap_xip.c	mm/xip: share the i_mmap_rwsem	2014-12-13 12:42:45 -08:00
fremap.c	Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux	2014-12-15 15:52:01 -08:00
frontswap.c	mm/frontswap.c: fix the condition in BUG_ON	2014-12-10 17:41:08 -08:00
gup.c	kernel: Provide READ_ONCE and ASSIGN_ONCE	2014-12-20 16:48:59 -08:00
highmem.c
huge_memory.c	Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux	2014-12-15 15:52:01 -08:00
hugetlb.c	Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux	2014-12-15 15:52:01 -08:00
hugetlb_cgroup.c	mm: hugetlb_cgroup: convert to lockless page counters	2014-12-10 17:41:04 -08:00
hwpoison-inject.c
init-mm.c
internal.h	mm, compaction: always update cached scanner positions	2014-12-10 17:41:06 -08:00
interval_tree.c
iov_iter.c	copy_from_iter_nocache()	2014-12-08 20:25:23 -05:00
Kconfig
Kconfig.debug	mm/debug_pagealloc: remove obsolete Kconfig options	2015-01-08 15:10:52 -08:00
kmemcheck.c
kmemleak-test.c
kmemleak.c
ksm.c
list_lru.c
maccess.c
madvise.c
Makefile	mm/page_owner: keep track of page owners	2014-12-13 12:42:48 -08:00
memblock.c	mm/memblock.c: refactor functions to set/clear MEMBLOCK_HOTPLUG	2014-12-13 12:42:46 -08:00
memcontrol.c	memcg: fix destination cgroup leak on task charges migration	2015-01-08 15:10:52 -08:00
memory-failure.c	mm: vmscan: invoke slab shrinkers from shrink_zone()	2014-12-13 12:42:48 -08:00
memory.c	mm: mmu_gather: use tlb->end != 0 only for TLB invalidation	2015-01-13 15:20:40 +13:00
memory_hotplug.c	mm, memory_hotplug/failure: drain single zone pcplists	2014-12-10 17:41:05 -08:00
mempolicy.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2014-12-19 18:19:19 -08:00
mempool.c
migrate.c	vm_area_operations: kill ->migrate()	2014-12-17 08:26:51 -05:00
mincore.c	mm: mincore: add hwpoison page handle	2014-12-13 12:42:46 -08:00
mlock.c
mm_init.c
mmap.c	mm: fix corner case in anon_vma endless growing prevention	2015-01-11 11:45:10 -08:00
mmu_context.c
mmu_notifier.c
mmzone.c
mprotect.c
mremap.c	Merge git://git.kvack.org/~bcrl/aio-next	2014-12-14 13:36:57 -08:00
msync.c
nobootmem.c
nommu.c	mm/nommu: use alloc_pages_exact() rather than its own implementation	2014-12-13 12:42:48 -08:00
oom_kill.c	oom: kill the insufficient and no longer needed PT_TRACE_EXIT check	2014-12-13 12:42:49 -08:00
page-writeback.c	mm: protect set_page_dirty() from ongoing truncation	2015-01-08 15:10:51 -08:00
page_alloc.c	mm: cma: split cma-reserved in dmesg log	2014-12-18 19:08:10 -08:00
page_counter.c	mm: memcontrol: remove obsolete kmemcg pinning tricks	2014-12-10 17:41:05 -08:00
page_ext.c	mm/page_owner: keep track of page owners	2014-12-13 12:42:48 -08:00
page_io.c
page_isolation.c	mm, page_isolation: drain single zone pcplists	2014-12-10 17:41:05 -08:00
page_owner.c	mm/page_owner: correct owner information for early allocated pages	2014-12-13 12:42:48 -08:00
pagewalk.c
percpu-km.c
percpu-vm.c
percpu.c
pgtable-generic.c
process_vm_access.c
quicklist.c
readahead.c
rmap.c	mm: prevent endless growth of anon_vma hierarchy	2015-01-08 15:10:51 -08:00
shmem.c	new helper: iter_is_iovec()	2014-12-17 06:43:56 -05:00
slab.c	slab: fix cpuset check in fallback_alloc	2014-12-13 12:42:53 -08:00
slab.h	memcg: use generic slab iterators for showing slabinfo	2014-12-10 17:41:07 -08:00
slab_common.c	memcg: use generic slab iterators for showing slabinfo	2014-12-10 17:41:07 -08:00
slob.c
slub.c	slub: fix cpuset check in get_any_partial	2014-12-13 12:42:53 -08:00
sparse-vmemmap.c
sparse.c
swap.c
swap_cgroup.c	mm: page_cgroup: rename file to mm/swap_cgroup.c	2014-12-10 17:41:09 -08:00
swap_state.c	mm: page_cgroup: rename file to mm/swap_cgroup.c	2014-12-10 17:41:09 -08:00
swapfile.c	mm: page_cgroup: rename file to mm/swap_cgroup.c	2014-12-10 17:41:09 -08:00
truncate.c
util.c
vmacache.c	mm,vmacache: count number of system-wide flushes	2014-12-13 12:42:48 -08:00
vmalloc.c	mm/vmalloc.c: fix memory ordering bug	2014-12-13 12:42:49 -08:00
vmpressure.c
vmscan.c	mm, vmscan: prevent kswapd livelock due to pfmemalloc-throttled process being killed	2015-01-08 15:10:52 -08:00
vmstat.c	mm,vmacache: count number of system-wide flushes	2014-12-13 12:42:48 -08:00
workingset.c
zbud.c	mm/zbud: init user ops only when it is needed	2014-12-13 12:42:51 -08:00
zpool.c
zsmalloc.c	mm/zsmalloc: adjust order of functions	2014-12-18 19:08:11 -08:00
zswap.c	mm/zswap: delete unnecessary check before calling free_percpu()	2014-12-13 12:42:50 -08:00