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android_kernel_sony_sdm845/mm
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Filename Latest commit message Latest commit date
Michal Hocko ba0520468b mm, vmstat: hide /proc/pagetypeinfo from normal users 
commit abaed0112c1db08be15a784a2c5c8a8b3063cdd3 upstream.

/proc/pagetypeinfo is a debugging tool to examine internal page
allocator state wrt to fragmentation.  It is not very useful for any
other use so normal users really do not need to read this file.

Waiman Long has noticed that reading this file can have negative side
effects because zone->lock is necessary for gathering data and that a)
interferes with the page allocator and its users and b) can lead to hard
lockups on large machines which have very long free_list.

Reduce both issues by simply not exporting the file to regular users.

Link: http://lkml.kernel.org/r/20191025072610.18526-2-mhocko@kernel.org
Fixes: 467c996c1e ("Print out statistics in relation to fragmentation avoidance to /proc/pagetypeinfo")
Signed-off-by: Michal Hocko <mhocko@suse.com>
Reported-by: Waiman Long <longman@redhat.com>
Acked-by: Mel Gorman <mgorman@suse.de>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Waiman Long <longman@redhat.com>
Acked-by: Rafael Aquini <aquini@redhat.com>
Acked-by: David Rientjes <rientjes@google.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: David Hildenbrand <david@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Roman Gushchin <guro@fb.com>
Cc: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Cc: Jann Horn <jannh@google.com>
Cc: Song Liu <songliubraving@fb.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: <stable@vger.kernel.org>
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>
2019-11-12 19:15:43 +01:00
..
kasan kasan: avoid -Wmaybe-uninitialized warning 2019-05-08 07:19:07 +02:00
backing-dev.c writeback: synchronize sync(2) against cgroup writeback membership switches 2019-05-21 18:49:01 +02:00
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
cma.c mm/cma.c: fail if fixed declaration can't be honored 2019-08-06 18:29:37 +02:00
cma.h
cma_debug.c mm/cma_debug.c: fix the break condition in cma_maxchunk_get() 2019-06-22 08:17:12 +02:00
compaction.c mm, compaction: fix NR_ISOLATED_* stats for pfn based migration 2017-01-12 11:39:32 +01:00
debug.c mm: get rid of vmacache_flush_all() entirely 2018-09-19 22:47:17 +02:00
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: fix signed overflow UBSAN complaint 2018-09-15 09:42:57 +02:00
failslab.c mm: fault-inject take over bootstrap kmem_cache check 2016-03-15 16:55:16 -07:00
filemap.c mm/filemap.c: fix NULL pointer in page_cache_tree_insert() 2018-04-24 09:34:18 +02:00
frame_vector.c mm/frame_vector.c: release a semaphore in 'get_vaddr_frames()' 2018-11-10 07:42:52 -08:00
frontswap.c mm, frontswap: convert frontswap_enabled to static key 2016-07-26 16:19:19 -07:00
gup.c mm: prevent get_user_pages() from overflowing page refcount 2019-06-11 12:22:45 +02:00
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, page_owner: handle THP splits correctly 2019-09-06 10:19:39 +02:00
hugetlb.c hugetlbfs: on restore reserve error path retain subpool reservation 2019-06-22 08:17:12 +02:00
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
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 mm: don't allow deferred pages with NEED_PER_CPU_KM 2018-05-22 16:57:57 +02:00
Kconfig.debug PM / Hibernate: allow hibernation with PAGE_POISONING_ZERO 2016-09-13 02:35:27 +02:00
khugepaged.c coredump: fix race condition between collapse_huge_page() and core dumping 2019-08-06 18:29:41 +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 mm/kmemleak.c: fix check for softirq context 2019-08-04 09:33:41 +02:00
ksm.c mm/ksm: fix interaction with THP 2018-05-30 07:50:41 +02:00
list_lru.c mm/list_lru.c: fix memory leak in __memcg_init_list_lru_node 2019-06-22 08:17:18 +02:00
maccess.c x86: remove more uaccess_32.h complexity 2016-05-22 17:21:27 -07:00
madvise.c mm: madvise(MADV_DODUMP): allow hugetlbfs pages 2018-10-10 08:53:20 +02:00
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 memcg, kmem: do not fail __GFP_NOFAIL charges 2019-10-05 12:30:34 +02:00
memory-failure.c mm: hwpoison: fix thp split handing in soft_offline_in_use_page() 2019-03-23 13:19:49 +01:00
memory.c mm: stop leaking PageTables 2019-02-20 10:18:34 +01:00
memory_hotplug.c mm, memory_hotplug: test_pages_in_a_zone do not pass the end of zone 2019-03-13 14:04:58 -07:00
mempolicy.c mm: mempolicy: make mbind() return -EIO when MPOL_MF_STRICT is specified 2019-04-05 22:29:05 +02:00
mempool.c Revert "mm, mempool: only set __GFP_NOMEMALLOC if there are free elements" 2016-07-28 16:07:41 -07:00
memtest.c
migrate.c hugetlbfs: fix races and page leaks during migration 2019-03-13 14:04:54 -07:00
mincore.c mm/mincore.c: make mincore() more conservative 2019-05-21 18:48:58 +02:00
mlock.c mm/mlock.c: change count_mm_mlocked_page_nr return type 2019-07-10 09:55:43 +02:00
mm_init.c mm: convert printk(KERN_<LEVEL> to pr_<level> 2016-03-17 15:09:34 -07:00
mmap.c coredump: fix race condition between mmget_not_zero()/get_task_mm() and core dumping 2019-08-06 18:29:41 +02:00
mmu_context.c mm/mmu_context, sched/core: Fix mmu_context.h assumption 2016-04-28 11:44:19 +02:00
mmu_notifier.c mm/mmu_notifier: use hlist_add_head_rcu() 2019-08-04 09:33:42 +02:00
mmzone.c mm, page_alloc: inline the fast path of the zonelist iterator 2016-05-19 19:12:14 -07:00
mprotect.c x86/speculation/l1tf: Disallow non privileged high MMIO PROT_NONE mappings 2018-08-15 18:14:45 +02:00
mremap.c mremap: properly flush TLB before releasing the page 2018-10-20 09:51:31 +02:00
msync.c
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 oom, oom_reaper: do not enqueue same task twice 2019-02-12 19:45:02 +01:00
page-writeback.c mm/page-writeback.c: don't break integrity writeback on ->writepage() error 2019-01-26 09:38:35 +01:00
page_alloc.c mem-hotplug: fix node spanned pages when we have a node with only ZONE_MOVABLE 2019-06-22 08:17:12 +02:00
page_counter.c
page_ext.c mm/page_ext.c: fix an imbalance with kmemleak 2019-04-05 22:29:06 +02:00
page_idle.c mm/page_idle.c: fix oops because end_pfn is larger than max_pfn 2019-07-10 09:55:38 +02:00
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: stop printing kernel addresses 2019-04-27 09:34:47 +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: migration: fix migration of huge PMD shared pages 2018-11-21 09:26:03 +01:00
shmem.c memfd: Fix locking when tagging pins 2019-10-29 09:15:13 +01:00
slab.c mm/slab.c: fix an infinite loop in leaks_show() 2019-06-22 08:17:13 +02:00
slab.h slub: move synchronize_sched out of slab_mutex on shrink 2017-03-22 12:43:38 +01:00
slab_common.c mm: don't warn about large allocations for slab 2018-12-01 09:44:19 +01:00
slob.c slub: move synchronize_sched out of slab_mutex on shrink 2017-03-22 12:43:38 +01:00
slub.c mm/slub: fix a deadlock in show_slab_objects() 2019-10-29 09:15:23 +01:00
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 x86/speculation/l1tf: Limit swap file size to MAX_PA/2 2018-08-15 18:14:45 +02:00
truncate.c mm: cleancache: fix corruption on missed inode invalidation 2018-12-08 13:05:09 +01:00
usercopy.c usercopy: Avoid HIGHMEM pfn warning 2019-10-17 13:42:06 -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: page_mapped: don't assume compound page is huge or THP 2019-01-16 22:12:32 +01:00
vmacache.c mm: get rid of vmacache_flush_all() entirely 2018-09-19 22:47:17 +02:00
vmalloc.c mm/vmalloc: Sync unmappings in __purge_vmap_area_lazy() 2019-08-25 10:51:20 +02:00
vmpressure.c mm: vmpressure: fix sending wrong events on underflow 2017-03-12 06:41:43 +01:00
vmscan.c mm: remove seemingly spurious reclaimability check from laptop_mode gating 2018-09-19 22:47:12 +02:00
vmstat.c mm, vmstat: hide /proc/pagetypeinfo from normal users 2019-11-12 19:15:43 +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
zpool.c
zsmalloc.c mm/zsmalloc.c: fix build when CONFIG_COMPACTION=n 2019-09-06 10:19:54 +02:00
zswap.c zswap: re-check zswap_is_full() after do zswap_shrink() 2018-09-05 09:20:02 +02:00