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10c6ec4980
linux/mm
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Mike Kravetz 10c6ec4980 hugetlb: change free_pool_huge_page to remove_pool_huge_page 
free_pool_huge_page was called with hugetlb_lock held.  It would remove
a hugetlb page, and then free the corresponding pages to the lower level
allocators such as buddy.  free_pool_huge_page was called in a loop to
remove hugetlb pages and these loops could hold the hugetlb_lock for a
considerable time.

Create new routine remove_pool_huge_page to replace free_pool_huge_page.
remove_pool_huge_page will remove the hugetlb page, and it must be
called with the hugetlb_lock held.  It will return the removed page and
it is the responsibility of the caller to free the page to the lower
level allocators.  The hugetlb_lock is dropped before freeing to these
allocators which results in shorter lock hold times.

Add new helper routine to call update_and_free_page for a list of pages.

Note: Some changes to the routine return_unused_surplus_pages are in
need of explanation.  Commit e5bbc8a6c9 ("mm/hugetlb.c: fix
reservation race when freeing surplus pages") modified this routine to
address a race which could occur when dropping the hugetlb_lock in the
loop that removes pool pages.  Accounting changes introduced in that
commit were subtle and took some thought to understand.  This commit
removes the cond_resched_lock() and the potential race.  Therefore,
remove the subtle code and restore the more straight forward accounting
effectively reverting the commit.

Link: https://lkml.kernel.org/r/20210409205254.242291-7-mike.kravetz@oracle.com
Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Cc: "Aneesh Kumar K . V" <aneesh.kumar@linux.ibm.com>
Cc: Barry Song <song.bao.hua@hisilicon.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Hillf Danton <hdanton@sina.com>
Cc: HORIGUCHI NAOYA <naoya.horiguchi@nec.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Mina Almasry <almasrymina@google.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Roman Gushchin <guro@fb.com>
Cc: Shakeel Butt <shakeelb@google.com>
Cc: Waiman Long <longman@redhat.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-05-05 11:27:22 -07:00
..
kasan kasan: record task_work_add() call stack 2021-04-30 11:20:42 -07:00
kfence kfence: make compatible with kmemleak 2021-03-25 09:22:55 -07:00
backing-dev.c mm/backing-dev.c: use might_alloc() 2021-02-26 09:41:01 -08:00
balloon_compaction.c
cleancache.c
cma_debug.c mm/cma: change cma mutex to irq safe spinlock 2021-05-05 11:27:21 -07:00
cma.c mm/cma: change cma mutex to irq safe spinlock 2021-05-05 11:27:21 -07:00
cma.h mm/cma: change cma mutex to irq safe spinlock 2021-05-05 11:27:21 -07:00
compaction.c mm, compaction: make fast_isolate_freepages() stay within zone 2021-02-24 13:38:34 -08:00
debug_page_ref.c
debug_vm_pgtable.c mm: HUGE_VMAP arch support cleanup 2021-04-30 11:20:40 -07:00
debug.c mm/debug: improve memcg debugging 2021-02-24 13:38:27 -08:00
dmapool.c mm/dmapool: switch from strlcpy to strscpy 2021-04-30 11:20:39 -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
filemap.c dax: account DAX entries as nrpages 2021-05-05 11:27:19 -07:00
frontswap.c mm/frontswap: mark various intentional data races 2020-08-14 19:56:56 -07:00
gup_test.c mm/gup_test.c: mark gup_test_init as __init function 2020-12-15 12:13:38 -08:00
gup_test.h selftests/vm: gup_test: introduce the dump_pages() sub-test 2020-12-15 12:13:38 -08:00
gup.c mm: gup: remove FOLL_SPLIT 2021-04-30 11:20:37 -07:00
highmem.c mm/highmem: fix CONFIG_DEBUG_KMAP_LOCAL_FORCE_MAP 2021-03-25 09:22:55 -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: huge_memory: debugfs for file-backed THP split 2021-05-05 11:27:21 -07:00
hugetlb_cgroup.c mm/hugetlb_cgroup: remove unnecessary VM_BUG_ON_PAGE in hugetlb_cgroup_migrate() 2021-05-05 11:27:20 -07:00
hugetlb.c hugetlb: change free_pool_huge_page to remove_pool_huge_page 2021-05-05 11:27:22 -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: combine __alloc_pages and __alloc_pages_nodemask 2021-04-30 11:20:42 -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: move vmap_range from mm/ioremap.c to mm/vmalloc.c 2021-04-30 11:20:40 -07:00
Kconfig mm: generalize HUGETLB_PAGE_SIZE_VARIABLE 2021-05-05 11:27:20 -07:00
Kconfig.debug mm, page_poison: remove CONFIG_PAGE_POISONING_ZERO 2020-12-15 12:13:46 -08:00
khugepaged.c khugepaged: remove meaningless !pte_present() check in khugepaged_scan_pmd() 2021-05-05 11:27:21 -07:00
kmemleak.c mm/kmemleak.c: fix a typo 2021-04-30 11:20:36 -07:00
ksm.c mm: cleanup kstrto*() usage 2020-12-15 12:13:47 -08:00
list_lru.c mm/list_lru.c: remove kvfree_rcu_local() 2021-02-24 13:38:30 -08:00
maccess.c uaccess: add force_uaccess_{begin,end} helpers 2020-08-12 10:57:59 -07:00
madvise.c mm/madvise: replace ptrace attach requirement for process_madvise 2021-03-13 11:27:30 -08:00
Makefile mm: add a io_mapping_map_user helper 2021-04-30 11:20:39 -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: remove return value of memblock_free_all() 2021-02-22 13:01:23 -08:00
memcontrol.c mm: memcontrol: inline __memcg_kmem_{un}charge() into obj_cgroup_{un}charge_pages() 2021-04-30 11:20:38 -07:00
memfd.c
memory_hotplug.c arm64: mte: Map hotplugged memory as Normal Tagged 2021-03-10 10:56:46 +00:00
memory-failure.c mm/memory-failure: unnecessary amount of unmapping 2021-04-30 11:20:44 -07:00
memory.c mm: apply_to_pte_range warn and fail if a large pte is encountered 2021-04-30 11:20:39 -07:00
mempolicy.c mm/mempolicy: fix mpol_misplaced kernel-doc 2021-04-30 11:20:43 -07:00
mempool.c kasan, mm: integrate page_alloc init with HW_TAGS 2021-04-30 11:20:41 -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/page_alloc: combine __alloc_pages and __alloc_pages_nodemask 2021-04-30 11:20:42 -07:00
mincore.c inode: make init and permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
mlock.c mm/mlock: stop counting mlocked pages when none vma is found 2021-02-26 09:41:01 -08:00
mm_init.c include/linux/page-flags-layout.h: cleanups 2021-04-30 11:20:42 -07:00
mmap_lock.c mm: mmap_lock: add tracepoints around lock acquisition 2020-12-15 12:13:41 -08:00
mmap.c Revert "mremap: don't allow MREMAP_DONTUNMAP on special_mappings and aio" 2021-04-30 11:20:39 -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/mprotect.c: optimize error detection in do_mprotect_pkey() 2021-02-24 13:38:30 -08:00
mremap.c Revert "mremap: don't allow MREMAP_DONTUNMAP on special_mappings and aio" 2021-04-30 11:20:39 -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/nommu: Fix return type of filemap_map_pages() 2021-01-28 14:10:31 +00:00
oom_kill.c mm: eliminate "expecting prototype" kernel-doc warnings 2021-04-16 16:10:36 -07:00
page_alloc.c mm: page_alloc: ignore init_on_free=1 for debug_pagealloc=1 2021-04-30 11:20:43 -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: fix some spelling mistakes in comments 2020-12-15 22:46:19 -08:00
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: detect page_owner recursion via task_struct 2021-04-30 11:20:36 -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: use list_entry_is_head() in page_reporting_cycle() 2021-02-24 13:38:30 -08:00
page_reporting.h
page_vma_mapped.c mm/page_vma_mapped.c: add colon to fix kernel-doc markups error for check_pte 2020-12-15 12:13:41 -08:00
page-writeback.c mm: page-writeback: simplify memcg handling in test_clear_page_writeback() 2021-04-30 11:20:37 -07:00
pagewalk.c
percpu-internal.h percpu: make pcpu_nr_empty_pop_pages per chunk type 2021-04-09 13:58:38 +00:00
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 percpu: make pcpu_nr_empty_pop_pages per chunk type 2021-04-09 13:58:38 +00:00
pgalloc-track.h mm: move p?d_alloc_track to separate header file 2020-08-07 11:33:26 -07:00
pgtable-generic.c mm/pgtable-generic.c: optimize the VM_BUG_ON condition in pmdp_huge_clear_flush() 2021-02-24 13:38:30 -08:00
process_vm_access.c mm/process_vm_access.c: include compat.h 2021-01-12 18:12:54 -08:00
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/rmap: correct obsolete comment of page_get_anon_vma() 2021-02-26 09:41:01 -08:00
rodata_test.c mm/rodata_test.c: fix missing function declaration 2020-08-21 09:52:53 -07:00
shmem.c shmem: allow reporting fanotify events with file handles on tmpfs 2021-04-19 16:03:48 +02:00
shuffle.c mm: eliminate "expecting prototype" kernel-doc warnings 2021-04-16 16:10:36 -07:00
shuffle.h mm/shuffle: remove dynamic reconfiguration 2020-08-07 11:33:29 -07:00
slab_common.c mm/slab_common: provide "slab_merge" option for !IS_ENABLED(CONFIG_SLAB_MERGE_DEFAULT) builds 2021-04-30 11:20:36 -07:00
slab.c kasan, mm: integrate slab init_on_free with HW_TAGS 2021-04-30 11:20:41 -07:00
slab.h kasan, mm: integrate slab init_on_alloc with HW_TAGS 2021-04-30 11:20:41 -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 kasan, mm: integrate slab init_on_free with HW_TAGS 2021-04-30 11:20:41 -07:00
sparse-vmemmap.c mm/sparse: only sub-section aligned range would be populated 2020-08-07 11:33:27 -07:00
sparse.c mm/sparse: add the missing sparse_buffer_fini() in error branch 2021-04-30 11:20:39 -07:00
swap_cgroup.c
swap_slots.c mm/swap_slots.c: remove redundant NULL check 2021-02-24 13:38:28 -08:00
swap_state.c mm: stop accounting shadow entries 2021-05-05 11:27:19 -07:00
swap.c mm: remove pagevec_lookup_entries 2021-02-26 09:40:59 -08:00
swapfile.c swap: fix swapfile read/write offset 2021-03-02 17:25:46 -07:00
truncate.c mm: stop accounting shadow entries 2021-05-05 11:27:19 -07:00
usercopy.c mm/usercopy.c: delete duplicated word 2020-08-12 10:57:58 -07:00
userfaultfd.c hugetlb: pass vma into huge_pte_alloc() and huge_pmd_share() 2021-05-05 11:27:20 -07:00
util.c mm: move page_mapping_file to pagemap.h 2021-04-30 11:20:37 -07:00
vmacache.c
vmalloc.c mm/vmalloc: remove an empty line 2021-04-30 11:20:40 -07:00
vmpressure.c
vmscan.c mm/vmscan: restore zone_reclaim_mode ABI 2021-02-24 13:38:34 -08:00
vmstat.c mm/vmstat.c: erase latency in vmstat_shepherd 2021-02-26 09:41:00 -08:00
workingset.c mm: stop accounting shadow entries 2021-05-05 11:27:19 -07:00
z3fold.c z3fold: prevent reclaim/free race for headless pages 2021-03-25 09:22:55 -07:00
zbud.c mm: set the sleep_mapped to true for zbud and z3fold 2021-02-26 09:41:01 -08:00
zpool.c mm/zswap: add the flag can_sleep_mapped 2021-02-26 09:41:01 -08:00
zsmalloc.c mm/zsmalloc.c: use page_private() to access page->private 2021-02-26 09:41:01 -08:00
zswap.c mm/zswap: add the flag can_sleep_mapped 2021-02-26 09:41:01 -08:00