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Muchun Song 6acfb5ba15 mm: migrate: fix missing update page_private to hugetlb_page_subpool 
Since commit d6995da311 ("hugetlb: use page.private for hugetlb specific
page flags") converts page.private for hugetlb specific page flags.  We
should use hugetlb_page_subpool() to get the subpool pointer instead of
page_private().

This 'could' prevent the migration of hugetlb pages.  page_private(hpage)
is now used for hugetlb page specific flags.  At migration time, the only
flag which could be set is HPageVmemmapOptimized.  This flag will only be
set if the new vmemmap reduction feature is enabled.  In addition,
!page_mapping() implies an anonymous mapping.  So, this will prevent
migration of hugetb pages in anonymous mappings if the vmemmap reduction
feature is enabled.

In addition, that if statement checked for the rare race condition of a
page being migrated while in the process of being freed.  Since that check
is now wrong, we could leak hugetlb subpool usage counts.

The commit forgot to update it in the page migration routine.  So fix it.

[songmuchun@bytedance.com: fix compiler error when !CONFIG_HUGETLB_PAGE reported by Randy]
  Link: https://lkml.kernel.org/r/20210521022747.35736-1-songmuchun@bytedance.com

Link: https://lkml.kernel.org/r/20210520025949.1866-1-songmuchun@bytedance.com
Fixes: d6995da311 ("hugetlb: use page.private for hugetlb specific page flags")
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Reported-by: Anshuman Khandual <anshuman.khandual@arm.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Tested-by: Anshuman Khandual <anshuman.khandual@arm.com>	[arm64]
Cc: Oscar Salvador <osalvador@suse.de>
Cc: David Hildenbrand <david@redhat.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Xiongchun Duan <duanxiongchun@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2021-06-30 20:47:29 -07:00
..
kasan kasan: add memory corruption identification support for hardware tag-based mode 2021-06-29 10:53:53 -07:00
kfence mm, slub: change run-time assertion in kmalloc_index() to compile-time 2021-06-29 10:53:46 -07:00
Kconfig mm/zbud: don't export any zbud API 2021-06-30 20:47:29 -07:00
Kconfig.debug mm, page_poison: remove CONFIG_PAGE_POISONING_ZERO 2020-12-15 12:13:46 -08:00
Makefile mm: hugetlb: free the vmemmap pages associated with each HugeTLB page 2021-06-30 20:47:25 -07:00
backing-dev.c writeback, cgroup: release dying cgwbs by switching attached inodes 2021-06-29 10:53:48 -07:00
balloon_compaction.c mm: fix typos in comments 2021-05-07 00:26:35 -07:00
bootmem_info.c mm: memory_hotplug: factor out bootmem core functions to bootmem_info.c 2021-06-30 20:47:25 -07:00
cleancache.c Driver Core and debugfs changes for 5.3-rc1 2019-07-12 12:24:03 -07:00
cma.c mm: use proper type for cma_[alloc|release] 2021-05-05 11:27:24 -07:00
cma.h mm: cma: support sysfs 2021-05-05 11:27:24 -07:00
cma_debug.c mm/cma: change cma mutex to irq safe spinlock 2021-05-05 11:27:21 -07:00
cma_sysfs.c mm: cma: support sysfs 2021-05-05 11:27:24 -07:00
compaction.c mm/compaction: fix 'limit' in fast_isolate_freepages 2021-06-30 20:47:29 -07:00
debug.c mm/debug: factor PagePoisoned out of __dump_page 2021-06-29 10:53:53 -07:00
debug_page_ref.c
…
debug_vm_pgtable.c mm/debug_vm_pgtable: remove redundant pfn_{pmd/pte}() and fix one comment mistake 2021-06-30 20:47:26 -07:00
dmapool.c mm/dmapool: use DEVICE_ATTR_RO macro 2021-06-29 10:53:52 -07:00
early_ioremap.c mm/early_ioremap.c: use __func__ instead of function name 2021-02-26 09:41:02 -08:00
fadvise.c mm, fadvise: improve the expensive remote LRU cache draining after FADV_DONTNEED 2020-10-13 18:38:29 -07:00
failslab.c mm/failslab.c: by default, do not fail allocations with direct reclaim only 2019-07-12 11:05:43 -07:00
filemap.c mm: charge active memcg when no mm is set 2021-06-29 10:53:50 -07:00
frontswap.c mm/mempool: minor coding style tweaks 2021-05-05 11:27:27 -07:00
gup.c mm: gup: pack has_pinned in MMF_HAS_PINNED 2021-06-29 10:53:48 -07:00
gup_test.c selftests/vm: gup_test: test faulting in kernel, and verify pinnable pages 2021-05-05 11:27:26 -07:00
gup_test.h selftests/vm: gup_test: fix test flag 2021-05-05 11:27:26 -07:00
highmem.c mm: fix typos in comments 2021-05-07 00:26:35 -07:00
hmm.c mm: do page fault accounting in handle_mm_fault 2020-08-12 10:58:02 -07:00
huge_memory.c mm/userfaultfd: fix uffd-wp special cases for fork() 2021-06-30 20:47:27 -07:00
hugetlb.c hugetlb: address ref count racing in prep_compound_gigantic_page 2021-06-30 20:47:27 -07:00
hugetlb_cgroup.c hugetlb: make free_huge_page irq safe 2021-05-05 11:27:22 -07:00
hugetlb_vmemmap.c mm: hugetlb: introduce CONFIG_HUGETLB_PAGE_FREE_VMEMMAP_DEFAULT_ON 2021-06-30 20:47:26 -07:00
hugetlb_vmemmap.h mm: hugetlb: introduce nr_free_vmemmap_pages in the struct hstate 2021-06-30 20:47:25 -07:00
hwpoison-inject.c mm,hwpoison-inject: don't pin for hwpoison_filter 2020-10-16 11:11:16 -07:00
init-mm.c mm/gup: prevent gup_fast from racing with COW during fork 2020-12-15 12:13:39 -08:00
internal.h mm/page_alloc: allow high-order pages to be stored on the per-cpu lists 2021-06-29 10:53:55 -07:00
interval_tree.c mm/interval_tree: add comments to improve code readability 2021-04-30 11:20:38 -07:00
io-mapping.c mm: add a io_mapping_map_user helper 2021-04-30 11:20:39 -07:00
ioremap.c mm/ioremap: fix iomap_max_page_shift 2021-05-14 19:41:32 -07:00
khugepaged.c mm/huge_memory.c: add missing read-only THP checking in transparent_hugepage_enabled() 2021-06-30 20:47:26 -07:00
kmemleak.c mm/kmemleak: fix possible wrong memory scanning period 2021-06-29 10:53:47 -07:00
ksm.c mm/ksm: use vma_lookup() in find_mergeable_vma() 2021-06-29 10:53:52 -07:00
list_lru.c mm: vmscan: consolidate shrinker_maps handling code 2021-05-05 11:27:23 -07:00
maccess.c uaccess: add force_uaccess_{begin,end} helpers 2020-08-12 10:57:59 -07:00
madvise.c mm: fix typos in comments 2021-05-07 00:26:35 -07:00
mapping_dirty_helpers.c mm/mapping_dirty_helpers: guard hugepage pud's usage 2021-04-16 16:10:37 -07:00
memblock.c memblock: update initialization of reserved pages 2021-06-30 20:47:29 -07:00
memcontrol.c loop: charge i/o to mem and blk cg 2021-06-29 10:53:50 -07:00
memfd.c mm: page cache: store only head pages in i_pages 2019-09-24 15:54:08 -07:00
memory-failure.c mm/hwpoison: disable pcp for page_handle_poison() 2021-06-30 20:47:27 -07:00
memory.c userfaultfd/shmem: support minor fault registration for shmem 2021-06-30 20:47:27 -07:00
memory_hotplug.c mm: sparsemem: use huge PMD mapping for vmemmap pages 2021-06-30 20:47:26 -07:00
mempolicy.c mm/mempolicy: use unified 'nodes' for bind/interleave/prefer policies 2021-06-30 20:47:29 -07:00
mempool.c mm/mempool: minor coding style tweaks 2021-05-05 11:27:27 -07:00
memremap.c mm/memremap.c: fix improper SPDX comment style 2021-04-30 11:20:37 -07:00
memtest.c
…
migrate.c mm: migrate: fix missing update page_private to hugetlb_page_subpool 2021-06-30 20:47:29 -07:00
mincore.c inode: make init and permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
mlock.c mm/mempool: minor coding style tweaks 2021-05-05 11:27:27 -07:00
mm_init.c include/linux/page-flags-layout.h: cleanups 2021-04-30 11:20:42 -07:00
mmap.c mm/mmap: use find_vma_intersection() in do_mmap() for overlap 2021-06-29 10:53:51 -07:00
mmap_lock.c mm: mmap_lock: use local locks instead of disabling preemption 2021-06-29 10:53:47 -07:00
mmu_gather.c mm: eliminate "expecting prototype" kernel-doc warnings 2021-04-16 16:10:36 -07:00
mmu_notifier.c mm/mmu_notifiers: ensure range_end() is paired with range_start() 2021-03-25 09:22:55 -07:00
mmzone.c mm/lru: replace pgdat lru_lock with lruvec lock 2020-12-15 14:48:04 -08:00
mprotect.c mm: fix typos in comments 2021-05-07 00:26:35 -07:00
mremap.c mm/mremap: use vma_lookup() in vma_to_resize() 2021-06-29 10:53:52 -07:00
msync.c mm/msync: exit early when the flags is an MS_ASYNC and start < vm_start 2021-04-30 11:20:37 -07:00
nommu.c mm: ignore MAP_EXECUTABLE in ksys_mmap_pgoff() 2021-06-29 10:53:50 -07:00
oom_kill.c mm/mempolicy: cleanup nodemask intersection check for oom 2021-06-30 20:47:29 -07:00
page-writeback.c fs: remove noop_set_page_dirty() 2021-06-29 10:53:48 -07:00
page_alloc.c hugetlb: address ref count racing in prep_compound_gigantic_page 2021-06-30 20:47:27 -07:00
page_counter.c mm: page_counter: mitigate consequences of a page_counter underflow 2021-04-30 11:20:38 -07:00
page_ext.c mm: replace CONFIG_FLAT_NODE_MEM_MAP with CONFIG_FLATMEM 2021-06-29 10:53:55 -07:00
page_idle.c mm: page_idle_get_page() does not need lru_lock 2020-12-15 14:48:03 -08:00
page_io.c swap: fix swapfile read/write offset 2021-03-02 17:25:46 -07:00
page_isolation.c mm/page_isolation: do not isolate the max order page 2020-12-15 12:13:45 -08:00
page_owner.c mm/page_owner: constify dump_page_owner 2021-06-29 10:53:53 -07:00
page_poison.c mm: page_poison: print page info when corruption is caught 2021-04-30 11:20:36 -07:00
page_reporting.c mm/page_reporting: allow driver to specify reporting order 2021-06-29 10:53:47 -07:00
page_reporting.h mm/page_reporting: export reporting order as module parameter 2021-06-29 10:53:47 -07:00
page_vma_mapped.c mm/thp: another PVMW_SYNC fix in page_vma_mapped_walk() 2021-06-24 19:40:53 -07:00
pagewalk.c mm: pagewalk: fix walk for hugepage tables 2021-06-29 10:53:49 -07:00
percpu-internal.h mm: fix typos in comments 2021-05-07 00:26:35 -07:00
percpu-km.c mm: memcg/percpu: account percpu memory to memory cgroups 2020-08-12 10:57:55 -07:00
percpu-stats.c percpu: make pcpu_nr_empty_pop_pages per chunk type 2021-04-09 13:58:38 +00:00
percpu-vm.c mm/vmalloc: remove unmap_kernel_range 2021-04-30 11:20:40 -07:00
percpu.c mm: fix typos in comments 2021-05-07 00:26:35 -07:00
pgalloc-track.h mm: fix typos in comments 2021-05-07 00:26:35 -07:00
pgtable-generic.c mm/thp: fix __split_huge_pmd_locked() on shmem migration entry 2021-06-16 09:24:42 -07:00
process_vm_access.c mm/process_vm_access.c: remove duplicate include 2021-05-05 11:27:27 -07:00
ptdump.c mm: ptdump: fix build failure 2021-04-16 16:10:37 -07:00
readahead.c mm: Implement readahead_control pageset expansion 2021-04-23 10:14:29 +01:00
rmap.c mm/thp: fix page_address_in_vma() on file THP tails 2021-06-16 09:24:42 -07:00
rodata_test.c mm/rodata_test.c: fix missing function declaration 2020-08-21 09:52:53 -07:00
shmem.c userfaultfd/shmem: modify shmem_mfill_atomic_pte to use install_pte() 2021-06-30 20:47:27 -07:00
shuffle.c mm: eliminate "expecting prototype" kernel-doc warnings 2021-04-16 16:10:36 -07:00
shuffle.h mm/shuffle: fix section mismatch warning 2021-05-22 15:09:07 -10:00
slab.c mm: fix typos in comments 2021-05-07 00:26:35 -07:00
slab.h mm: memcg/slab: properly set up gfp flags for objcg pointer array 2021-06-29 10:53:49 -07:00
slab_common.c mm: memcg/slab: disable cache merging for KMALLOC_NORMAL caches 2021-06-29 10:53:49 -07:00
slob.c mm: Don't build mm_dump_obj() on CONFIG_PRINTK=n kernels 2021-03-08 14:18:46 -08:00
slub.c mm/slub: add taint after the errors are printed 2021-06-29 10:53:47 -07:00
sparse-vmemmap.c mm: sparsemem: split the huge PMD mapping of vmemmap pages 2021-06-30 20:47:26 -07:00
sparse.c mm: memory_hotplug: factor out bootmem core functions to bootmem_info.c 2021-06-30 20:47:25 -07:00
swap.c mm/page_alloc: allow high-order pages to be stored on the per-cpu lists 2021-06-29 10:53:55 -07:00
swap_cgroup.c mm: memcontrol: make swap tracking an integral part of memory control 2020-06-03 20:09:48 -07:00
swap_slots.c mm/swap_slots.c: delete meaningless forward declarations 2021-06-29 10:53:49 -07:00
swap_state.c swap: check mapping_empty() for swap cache before being freed 2021-06-29 10:53:49 -07:00
swapfile.c mm, swap: remove unnecessary smp_rmb() in swap_type_to_swap_info() 2021-06-29 10:53:49 -07:00
truncate.c mm/thp: unmap_mapping_page() to fix THP truncate_cleanup_page() 2021-06-16 09:24:42 -07:00
usercopy.c mm/usercopy.c: delete duplicated word 2020-08-12 10:57:58 -07:00
userfaultfd.c userfaultfd/shmem: modify shmem_mfill_atomic_pte to use install_pte() 2021-06-30 20:47:27 -07:00
util.c mm: introduce page_offline_(begin|end|freeze|thaw) to synchronize setting PageOffline() 2021-06-30 20:47:28 -07:00
vmacache.c kernel: better document the use_mm/unuse_mm API contract 2020-06-10 19:14:18 -07:00
vmalloc.c mm/vmalloc: enable mapping of huge pages at pte level in vmalloc 2021-06-30 20:47:26 -07:00
vmpressure.c mm: vmpressure: use mem_cgroup_is_root API 2020-04-02 09:35:31 -07:00
vmscan.c mm/vmscan.c: fix potential deadlock in reclaim_pages() 2021-06-30 20:47:28 -07:00
vmstat.c mm/vmstat: inline NUMA event counter updates 2021-06-29 10:53:54 -07:00
workingset.c mm: workingset: define macro WORKINGSET_SHIFT 2021-06-30 20:47:28 -07:00
z3fold.c mm/z3fold: use release_z3fold_page_locked() to release locked z3fold page 2021-06-30 20:47:29 -07:00
zbud.c mm/zbud: don't export any zbud API 2021-06-30 20:47:29 -07:00
zpool.c mm: fix typos in comments 2021-05-07 00:26:35 -07:00
zsmalloc.c mm: fix typos in comments 2021-05-07 00:26:35 -07:00
zswap.c mm/zswap.c: switch from strlcpy to strscpy 2021-05-05 11:27:27 -07:00