Kirill A. Shutemov 8ab899550b mm/shmem: do not wait for lock_page() in shmem_unused_huge_shrink() ... commit b3cd54b257 upstream. shmem_unused_huge_shrink() gets called from reclaim path. Waiting for page lock may lead to deadlock there. There was a bug report that may be attributed to this: http://lkml.kernel.org/r/alpine.LRH.2.11.1801242349220.30642@mail.ewheeler.net Replace lock_page() with trylock_page() and skip the page if we failed to lock it. We will get to the page on the next scan. We can test for the PageTransHuge() outside the page lock as we only need protection against splitting the page under us. Holding pin oni the page is enough for this. Link: http://lkml.kernel.org/r/20180316210830.43738-1-kirill.shutemov@linux.intel.com Fixes: 779750d20b ("shmem: split huge pages beyond i_size under memory pressure") Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Reported-by: Eric Wheeler <linux-mm@lists.ewheeler.net> Acked-by: Michal Hocko <mhocko@suse.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Cc: Hugh Dickins <hughd@google.com> Cc: <stable@vger.kernel.org> [4.8+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2018-03-28 18:39:22 +02:00
..
kasan	kasan: respect /proc/sys/kernel/traceoff_on_warning	2017-06-17 06:41:51 +02:00
backing-dev.c	block: fix double-free in the failure path of cgwb_bdi_init()	2017-02-26 11:10:52 +01:00
balloon_compaction.c	mm: balloon: use general non-lru movable page feature	2016-07-26 16:19:19 -07:00
bootmem.c	mm: kmemleak: avoid using __va() on addresses that don't have a lowmem mapping	2016-10-11 15:06:33 -07:00
cleancache.c	cleancache: constify cleancache_ops structure	2016-01-27 09:09:57 -05:00
cma.c	cma: fix calculation of aligned offset	2018-01-31 12:55:51 +01:00
cma.h
cma_debug.c
compaction.c	mm, compaction: fix NR_ISOLATED_* stats for pfn based migration	2017-01-12 11:39:32 +01:00
debug.c	mm: clarify why we avoid page_mapcount() for slab pages in dump_page()	2016-10-07 18:46:29 -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
dmapool.c	mm: convert printk(KERN_<LEVEL> to pr_<level>	2016-03-17 15:09:34 -07:00
early_ioremap.c	mm/early_ioremap: Fix boot hang with earlyprintk=efi,keep	2018-02-25 11:05:49 +01:00
fadvise.c	mm/fadvise.c: do not discard partial pages with POSIX_FADV_DONTNEED	2016-06-09 14:23:11 -07:00
failslab.c	mm: fault-inject take over bootstrap kmem_cache check	2016-03-15 16:55:16 -07:00
filemap.c	mm: do not access page->mapping directly on page_endio	2017-03-12 06:41:43 +01:00
frame_vector.c	mm: fail get_vaddr_frames() for filesystem-dax mappings	2018-02-28 10:18:34 +01:00
frontswap.c	mm, frontswap: convert frontswap_enabled to static key	2016-07-26 16:19:19 -07:00
gup.c	mm: introduce get_user_pages_longterm	2018-02-28 10:18:33 +01:00
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: do not wait for lock_page() in deferred_split_scan()	2018-03-28 18:39:21 +02:00
hugetlb.c	mm, hugetlbfs: introduce ->split() to vm_operations_struct	2017-12-05 11:24:32 +01:00
hugetlb_cgroup.c	mm, hugetlb_cgroup: round limit_in_bytes down to hugepage size	2016-05-20 17:58:30 -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	mm: Add a user_ns owner to mm_struct and fix ptrace permission checks	2017-01-06 10:40:13 +01:00
internal.h	mm: fix 100% CPU kswapd busyloop on unreclaimable nodes	2018-01-31 12:55:53 +01:00
interval_tree.c
Kconfig	Allow KASAN and HOTPLUG_MEMORY to co-exist when doing build testing	2016-10-27 16:23:01 -07:00
Kconfig.debug	PM / Hibernate: allow hibernation with PAGE_POISONING_ZERO	2016-09-13 02:35:27 +02:00
khugepaged.c	mm/khugepaged.c: convert VM_BUG_ON() to collapse fail	2018-03-28 18:39:21 +02:00
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	kmemleak: add scheduling point to kmemleak_scan()	2018-02-03 17:05:39 +01:00
ksm.c	ksm: prevent crash after write_protect_page fails	2017-06-07 12:07:49 +02:00
list_lru.c	mm/list_lru.c: fix list_lru_count_node() to be race free	2017-07-21 07:42:21 +02:00
maccess.c	x86: remove more uaccess_32.h complexity	2016-05-22 17:21:27 -07:00
madvise.c	mm/madvise.c: fix madvise() infinite loop under special circumstances	2017-12-05 11:24:32 +01:00
Makefile	Disable the __builtin_return_address() warning globally after all	2016-10-12 10:23:41 -07:00
memblock.c	mm/memblock.c: reversed logic in memblock_discard()	2017-08-30 10:21:47 +02:00
memcontrol.c	hwpoison, memcg: forcibly uncharge LRU pages	2018-01-31 12:55:51 +01:00
memory-failure.c	mm: hwpoison: call shake_page() after try_to_unmap() for mlocked page	2018-03-24 11:00:21 +01:00
memory.c	mm: avoid spurious 'bad pmd' warning messages	2018-02-28 10:18:33 +01:00
memory_hotplug.c	mm/memory_hotplug: set magic number to page->freelist instead of page->lru.next	2017-10-21 17:21:36 +02:00
mempolicy.c	mm/mempolicy: fix use after free when calling get_mempolicy	2017-08-24 17:12:20 -07:00
mempool.c	Revert "mm, mempool: only set __GFP_NOMEMALLOC if there are free elements"	2016-07-28 16:07:41 -07:00
memtest.c	memtest: remove unused header files	2015-09-08 15:35:28 -07:00
migrate.c	Sanitize 'move_pages()' permission checks	2017-08-24 17:12:21 -07:00
mincore.c	mm, swap: use offset of swap entry as key of swap cache	2016-10-07 18:46:28 -07:00
mlock.c	mlock: fix mlock count can not decrease in race condition	2017-06-07 12:07:49 +02:00
mm_init.c	mm: convert printk(KERN_<LEVEL> to pr_<level>	2016-03-17 15:09:34 -07:00
mmap.c	mm/mmap.c: do not blow on PROT_NONE MAP_FIXED holes in the stack	2018-01-31 12:55:51 +01:00
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, mprotect: flush TLB if potentially racing with a parallel reclaim leaving stale TLB entries	2017-08-11 08:49:29 -07:00
mremap.c	mm, mprotect: flush TLB if potentially racing with a parallel reclaim leaving stale TLB entries	2017-08-11 08:49:29 -07:00
msync.c	mm/msync: use offset_in_page macro	2015-11-05 19:34:48 -08:00
nobootmem.c	mm: discard memblock data later	2017-08-24 17:12:19 -07:00
nommu.c	ptrace: Don't allow accessing an undumpable mm	2017-01-06 10:40:13 +01:00
oom_kill.c	mm, oom_reaper: gather each vma to prevent leaking TLB entry	2017-12-09 22:01:47 +01:00
page-writeback.c	mm: don't use radix tree writeback tags for pages in swap cache	2016-10-07 18:46:28 -07:00
page_alloc.c	mm: fix 100% CPU kswapd busyloop on unreclaimable nodes	2018-01-31 12:55:53 +01:00
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_ext: support extra space allocation by page_ext user	2016-10-07 18:46:27 -07:00
page_idle.c	mm, vmscan: move lru_lock to the node	2016-07-28 16:07:41 -07:00
page_io.c	mm/page_io.c: replace some BUG_ON()s with VM_BUG_ON_PAGE()	2016-10-07 18:46:29 -07:00
page_isolation.c	mm/page_isolation: fix typo: "paes" -> "pages"	2016-10-07 18:46:29 -07:00
page_owner.c	mm/page_owner: don't define fields on struct page_ext by hard-coding	2016-10-07 18:46:27 -07:00
page_poison.c	mm: check the return value of lookup_page_ext for all call sites	2016-06-03 15:06:22 -07:00
pagewalk.c	mm/pagewalk.c: report holes in hugetlb ranges	2017-11-24 08:33:42 +01:00
percpu-km.c	mm: percpu: use pr_fmt to prefix output	2016-03-17 15:09:34 -07:00
percpu-vm.c
percpu.c	percpu: acquire pcpu_lock when updating pcpu_nr_empty_pop_pages	2017-03-26 13:05:58 +02:00
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: remove write/force parameters from __get_user_pages_unlocked()	2016-10-18 14:13:37 -07:00
quicklist.c	fix Christoph's email addresses	2016-03-17 15:09:34 -07:00
readahead.c	mm: silently skip readahead for DAX inodes	2016-08-26 17:39:35 -07:00
rmap.c	mm, mprotect: flush TLB if potentially racing with a parallel reclaim leaving stale TLB entries	2017-08-11 08:49:29 -07:00
shmem.c	mm/shmem: do not wait for lock_page() in shmem_unused_huge_shrink()	2018-03-28 18:39:22 +02:00
slab.c	slub: move synchronize_sched out of slab_mutex on shrink	2017-03-22 12:43:38 +01:00
slab.h	slub: move synchronize_sched out of slab_mutex on shrink	2017-03-22 12:43:38 +01:00
slab_common.c	slub: do not merge cache if slub_debug contains a never-merge flag	2017-10-21 17:21:36 +02:00
slob.c	slub: move synchronize_sched out of slab_mutex on shrink	2017-03-22 12:43:38 +01:00
slub.c	mm/slub.c: trace free objects at KERN_INFO	2017-06-07 12:07:49 +02:00
sparse-vmemmap.c	treewide: replace obsolete _refok by __ref	2016-08-02 17:31:41 -04:00
sparse.c	mm/memory_hotplug: set magic number to page->freelist instead of page->lru.next	2017-10-21 17:21:36 +02:00
swap.c	thp: reduce usage of huge zero page's atomic counter	2016-10-07 18:46:28 -07:00
swap_cgroup.c	mm, swap_cgroup: reschedule when neeed in swap_cgroup_swapoff()	2017-07-05 14:40:17 +02:00
swap_state.c	mm, swap: use offset of swap entry as key of swap cache	2016-10-07 18:46:28 -07:00
swapfile.c	mm: support anonymous stable page	2017-01-19 20:17:59 +01:00
truncate.c	fs: add i_blocksize()	2017-06-14 15:06:00 +02:00
usercopy.c	mm: usercopy: Check for module addresses	2016-09-20 16:07:39 -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	Provide a function to create a NUL-terminated string from unterminated data	2018-02-25 11:05:41 +01:00
vmacache.c	mm: unrig VMA cache hit ratio	2016-10-07 18:46:27 -07:00
vmalloc.c	mm/vmalloc.c: huge-vmap: fail gracefully on unexpected huge vmap mappings	2017-07-05 14:40:28 +02:00
vmpressure.c	mm: vmpressure: fix sending wrong events on underflow	2017-03-12 06:41:43 +01:00
vmscan.c	mm: fix check for reclaimable pages in PF_MEMALLOC reclaim throttling	2018-03-24 11:00:21 +01:00
vmstat.c	mm, vmstat: suppress pcp stats for unpopulated zones in zoneinfo	2018-03-24 11:00:21 +01:00
workingset.c	mm: workingset: fix premature shadow node shrinking with cgroups	2017-04-08 09:30:36 +02:00
z3fold.c	mm/z3fold.c: avoid modifying HEADLESS page and minor cleanup	2016-06-03 16:02:55 -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	zsmalloc: calling zs_map_object() from irq is a bug	2017-12-14 09:28:23 +01:00
zswap.c	zswap: don't param_set_charp while holding spinlock	2018-01-17 09:38:52 +01:00