Michal Hocko ae79878356 mm: make vm_munmap killable ... Almost all current users of vm_munmap are ignoring the return value and so they do not handle potential error. This means that some VMAs might stay behind. This patch doesn't try to solve those potential problems. Quite contrary it adds a new failure mode by using down_write_killable in vm_munmap. This should be safer than other failure modes, though, because the process is guaranteed to die as soon as it leaves the kernel and exit_mmap will clean the whole address space. This will help in the OOM conditions when the oom victim might be stuck waiting for the mmap_sem for write which in turn can block oom_reaper which relies on the mmap_sem for read to make a forward progress and reclaim the address space of the victim. Signed-off-by: Michal Hocko <mhocko@suse.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Konstantin Khlebnikov <koct9i@gmail.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2016-05-23 17:04:14 -07:00
..
kasan	mm/kasan: add API to check memory regions	2016-05-20 17:58:30 -07:00
backing-dev.c	mm: throttle on IO only when there are too many dirty and writeback pages	2016-05-20 17:58:30 -07:00
balloon_compaction.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2016-03-17 21:38:27 -07:00
bootmem.c	mm: convert printk(KERN_<LEVEL> to pr_<level>	2016-03-17 15:09:34 -07:00
cleancache.c	cleancache: constify cleancache_ops structure	2016-01-27 09:09:57 -05:00
cma_debug.c	mm/cma_debug: correct size input to bitmap function	2015-07-17 16:39:54 -07:00
cma.c	mm/cma.c: suppress warning	2015-11-05 19:34:48 -08:00
cma.h	mm: cma: mark cma_bitmap_maxno() inline in header	2015-08-14 15:56:32 -07:00
compaction.c	mm/compaction.c: fix zoneindex in kcompactd()	2016-05-20 17:58:30 -07:00
debug_page_ref.c	mm/page_ref: add tracepoint to track down page reference manipulation	2016-03-17 15:09:34 -07:00
debug.c	mm: introduce page reference manipulation functions	2016-03-17 15:09:34 -07:00
dmapool.c	mm: convert printk(KERN_<LEVEL> to pr_<level>	2016-03-17 15:09:34 -07:00
early_ioremap.c	mm/early_ioremap: use offset_in_page macro	2015-11-05 19:34:48 -08:00
fadvise.c	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
failslab.c	mm: fault-inject take over bootstrap kmem_cache check	2016-03-15 16:55:16 -07:00
filemap.c	radix-tree: introduce radix_tree_replace_clear_tags()	2016-05-20 17:58:30 -07:00
frame_vector.c	mm/gup: Switch all callers of get_user_pages() to not pass tsk/mm	2016-02-16 10:11:12 +01:00
frontswap.c	frontswap: allow multiple backends	2015-06-24 17:49:45 -07:00
gup.c	Merge branch 'mm-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-04-14 19:31:34 -07:00
highmem.c	mm/highmem: make nr_free_highpages() handles all highmem zones by itself	2016-05-19 19:12:14 -07:00
huge_memory.c	mm, thp: khugepaged should scan when sleep value is written	2016-05-20 17:58:30 -07:00
hugetlb_cgroup.c	mm, hugetlb_cgroup: round limit_in_bytes down to hugepage size	2016-05-20 17:58:30 -07:00
hugetlb.c	mm/hugetlb: add same zone check in pfn_range_valid_gigantic()	2016-05-19 19:12:14 -07:00
hwpoison-inject.c	hwpoison: use page_cgroup_ino for filtering by memcg	2015-09-10 13:29:01 -07:00
init-mm.c
internal.h	mm: make vm_mmap killable	2016-05-23 17:04:14 -07:00
interval_tree.c	mm: replace vma->sharead.linear with vma->shared	2015-02-10 14:30:31 -08:00
Kconfig	raxix-tree: introduce CONFIG_RADIX_TREE_MULTIORDER	2016-05-20 17:58:30 -07:00
Kconfig.debug	mm/page_ref: add tracepoint to track down page reference manipulation	2016-03-17 15:09:34 -07:00
kmemcheck.c	mm: convert printk(KERN_<LEVEL> to pr_<level>	2016-03-17 15:09:34 -07:00
kmemleak-test.c	mm: convert printk(KERN_<LEVEL> to pr_<level>	2016-03-17 15:09:34 -07:00
kmemleak.c	mm: coalesce split strings	2016-03-17 15:09:34 -07:00
ksm.c	ksm: fix conflict between mmput and scan_get_next_rmap_item	2016-05-12 15:52:50 -07:00
list_lru.c	mm: memcontrol: move kmem accounting code to CONFIG_MEMCG	2016-01-20 17:09:18 -08:00
maccess.c	x86: remove more uaccess_32.h complexity	2016-05-22 17:21:27 -07:00
madvise.c	mm: make mmap_sem for write waits killable for mm syscalls	2016-05-23 17:04:14 -07:00
Makefile	z3fold: the 3-fold allocator for compressed pages	2016-05-20 17:58:30 -07:00
memblock.c	mm/memblock.c: remove unnecessary always-true comparison	2016-05-20 17:58:30 -07:00
memcontrol.c	mm: memcontrol: fix possible css ref leak on oom	2016-05-23 17:04:14 -07:00
memory_hotplug.c	memory_hotplug: introduce memhp_default_state= command line parameter	2016-05-19 19:12:14 -07:00
memory-failure.c	mm/memory-failure.c: replace "MCE" with "Memory failure"	2016-05-20 17:58:30 -07:00
memory.c	mm: disable fault around on emulated access bit architecture	2016-05-20 17:58:30 -07:00
mempolicy.c	mm, page_alloc: avoid looking up the first zone in a zonelist twice	2016-05-19 19:12:14 -07:00
mempool.c	mm: kasan: initial memory quarantine implementation	2016-05-20 17:58:30 -07:00
memtest.c	memtest: remove unused header files	2015-09-08 15:35:28 -07:00
migrate.c	mm, migrate: increment fail count on ENOMEM	2016-05-20 17:58:30 -07:00
mincore.c	mm, fs: remove remaining PAGE_CACHE_* and page_cache_{get,release} usage	2016-04-04 10:41:08 -07:00
mlock.c	mm: make mmap_sem for write waits killable for mm syscalls	2016-05-23 17:04:14 -07:00
mm_init.c	mm: convert printk(KERN_<LEVEL> to pr_<level>	2016-03-17 15:09:34 -07:00
mmap.c	mm: make vm_munmap killable	2016-05-23 17:04:14 -07:00
mmu_context.c	mm/mmu_context, sched/core: Fix mmu_context.h assumption	2016-04-28 11:44:19 +02:00
mmu_notifier.c	fix Christoph's email addresses	2016-03-17 15:09:34 -07:00
mmzone.c	mm, page_alloc: inline the fast path of the zonelist iterator	2016-05-19 19:12:14 -07:00
mprotect.c	mm: make mmap_sem for write waits killable for mm syscalls	2016-05-23 17:04:14 -07:00
mremap.c	mm: make mmap_sem for write waits killable for mm syscalls	2016-05-23 17:04:14 -07:00
msync.c	mm/msync: use offset_in_page macro	2015-11-05 19:34:48 -08:00
nobootmem.c	mm: convert printk(KERN_<LEVEL> to pr_<level>	2016-03-17 15:09:34 -07:00
nommu.c	mm: make vm_mmap killable	2016-05-23 17:04:14 -07:00
oom_kill.c	mm,oom: speed up select_bad_process() loop	2016-05-20 17:58:30 -07:00
page_alloc.c	mm: check_new_page_bad() directly returns in __PG_HWPOISON case	2016-05-20 17:58:30 -07:00
page_counter.c	mm: page_counter: let page_counter_try_charge() return bool	2015-11-05 19:34:48 -08:00
page_ext.c	mm/page_poisoning.c: allow for zero poisoning	2016-03-15 16:55:16 -07:00
page_idle.c	mm: add page_check_address_transhuge() helper	2016-01-15 17:56:32 -08:00
page_io.c	Merge branch 'work.preadv2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2016-05-17 15:05:23 -07:00
page_isolation.c	mm/memory_hotplug: add comment to some functions related to memory hotplug	2016-05-19 19:12:14 -07:00
page_owner.c	mm, page_alloc: inline pageblock lookup in page free fast paths	2016-05-19 19:12:14 -07:00
page_poison.c	mm: use existing helper to convert "on"/"off" to boolean	2016-05-20 17:58:30 -07:00
page-writeback.c	MM: increase safety margin provided by PF_LESS_THROTTLE	2016-05-20 17:58:30 -07:00
pagewalk.c	thp: rename split_huge_page_pmd() to split_huge_pmd()	2016-01-15 17:56:32 -08:00
percpu-km.c	mm: percpu: use pr_fmt to prefix output	2016-03-17 15:09:34 -07:00
percpu-vm.c	percpu: move region iterations out of pcpu_[de]populate_chunk()	2014-09-02 14:46:02 -04:00
percpu.c	mm: percpu: use pr_fmt to prefix output	2016-03-17 15:09:34 -07:00
pgtable-generic.c	mm/thp/migration: switch from flush_tlb_range to flush_pmd_tlb_range	2016-03-17 15:09:34 -07:00
process_vm_access.c	mm/gup: Introduce get_user_pages_remote()	2016-02-16 10:04:09 +01:00
quicklist.c	fix Christoph's email addresses	2016-03-17 15:09:34 -07:00
readahead.c	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
rmap.c	mm: use __SetPageSwapBacked and dont ClearPageSwapBacked	2016-05-19 19:12:14 -07:00
shmem.c	tmpfs: mem_cgroup charge fault to vm_mm not current mm	2016-05-19 19:12:14 -07:00
slab_common.c	mm: kasan: initial memory quarantine implementation	2016-05-20 17:58:30 -07:00
slab.c	mm, kasan: don't call kasan_krealloc() from ksize().	2016-05-20 17:58:30 -07:00
slab.h	mm: kasan: initial memory quarantine implementation	2016-05-20 17:58:30 -07:00
slob.c	mm: slab: free kmem_cache_node after destroy sysfs file	2016-02-18 16:23:24 -08:00
slub.c	mm, kasan: don't call kasan_krealloc() from ksize().	2016-05-20 17:58:30 -07:00
sparse-vmemmap.c	mm: convert printk(KERN_<LEVEL> to pr_<level>	2016-03-17 15:09:34 -07:00
sparse.c	mm: convert printk(KERN_<LEVEL> to pr_<level>	2016-03-17 15:09:34 -07:00
swap_cgroup.c	mm: convert printk(KERN_<LEVEL> to pr_<level>	2016-03-17 15:09:34 -07:00
swap_state.c	mm: use __SetPageSwapBacked and dont ClearPageSwapBacked	2016-05-19 19:12:14 -07:00
swap.c	mm/swap.c: put activate_page_pvecs and other pagevecs together	2016-05-20 17:58:30 -07:00
swapfile.c	mm: thp: calculate the mapcount correctly for THP pages during WP faults	2016-05-12 15:52:50 -07:00
truncate.c	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
userfaultfd.c	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
util.c	mm: make vm_mmap killable	2016-05-23 17:04:14 -07:00
vmacache.c	mm/vmacache: inline vmacache_valid_mm()	2015-11-05 19:34:48 -08:00
vmalloc.c	mm/vmalloc: keep a separate lazy-free list	2016-05-20 17:58:30 -07:00
vmpressure.c	mm/vmpressure.c: fix subtree pressure detection	2016-02-03 08:28:43 -08:00
vmscan.c	mm, oom: rework oom detection	2016-05-20 17:58:30 -07:00
vmstat.c	vmstat: get rid of the ugly cpu_stat_off variable	2016-05-20 17:58:30 -07:00
workingset.c	mm: workingset: make shadow node shrinker memcg aware	2016-03-17 15:09:34 -07:00
z3fold.c	z3fold: the 3-fold allocator for compressed pages	2016-05-20 17:58:30 -07:00
zbud.c	mm/zbud.c: use list_last_entry() instead of list_tail_entry()	2016-01-15 11:40:52 -08:00
zpool.c	mm: zsmalloc: constify struct zs_pool name	2015-11-06 17:50:42 -08:00
zsmalloc.c	mm/zsmalloc: don't fail if can't create debugfs info	2016-05-20 17:58:30 -07:00
zswap.c	mm/zswap: use workqueue to destroy pool	2016-05-20 17:58:30 -07:00