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linux-stable/mm
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Mike Kravetz d2d0ecb944 hugetlb: fix huge_pmd_unshare address update 
commit 48381273f8734d28ef56a5bdf1966dd8530111bc upstream.

The routine huge_pmd_unshare() is passed a pointer to an address
associated with an area which may be unshared.  If unshare is successful
this address is updated to 'optimize' callers iterating over huge page
addresses.  For the optimization to work correctly, address should be
updated to the last huge page in the unmapped/unshared area.  However, in
the common case where the passed address is PUD_SIZE aligned, the address
is incorrectly updated to the address of the preceding huge page.  That
wastes CPU cycles as the unmapped/unshared range is scanned twice.

Link: https://lkml.kernel.org/r/20220524205003.126184-1-mike.kravetz@oracle.com
Fixes: 39dde65c9940 ("shared page table for hugetlb page")
Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com>
Acked-by: Muchun Song <songmuchun@bytedance.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-06-14 16:59:29 +02:00
..
kasan
kasan: fix incorrect arguments passing in kasan_add_zero_shadow
2021-01-27 11:05:43 +01:00
backing-dev.c
mm: bdi: initialize bdi_min_ratio when bdi is unregistered
2021-12-14 10:18:05 +01:00
balloon_compaction.c
virtio_balloon: fix deadlock on OOM
2017-11-14 23:57:38 +02:00
bootmem.c
docs/mm: bootmem: add overview documentation
2018-08-02 12:17:27 -06:00
cleancache.c
mm: use octal not symbolic permissions
2018-06-15 07:55:25 +09:00
cma_debug.c
mm/cma_debug.c: fix the break condition in cma_maxchunk_get()
2019-06-15 11:54:01 +02:00
cma.c
mm/cma.c: fail if fixed declaration can't be honored
2019-08-06 19:06:51 +02:00
cma.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
compaction.c
mm/compaction.c: clear total_{migrate,free}_scanned before scanning a new zone
2019-10-05 13:10:13 +02:00
debug_page_ref.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
debug.c
mm: get rid of vmacache_flush_all() entirely
2018-09-13 15:18:04 -10:00
dmapool.c
mm: use octal not symbolic permissions
2018-06-15 07:55:25 +09:00
early_ioremap.c
mm/early_ioremap: Fix boot hang with earlyprintk=efi,keep
2017-12-11 14:54:44 +01:00
fadvise.c
vfs: implement readahead(2) using POSIX_FADV_WILLNEED
2018-08-30 20:01:32 +02:00
failslab.c
mm: use octal not symbolic permissions
2018-06-15 07:55:25 +09:00
filemap.c
mm/filemap.c: clear page error before actual read
2020-10-01 13:14:41 +02:00
frame_vector.c
mm/frame_vector.c: release a semaphore in 'get_vaddr_frames()'
2017-12-14 16:00:48 -08:00
frontswap.c
mm: use octal not symbolic permissions
2018-06-15 07:55:25 +09:00
gup_benchmark.c
mm/gup_benchmark.c: prevent integer overflow in ioctl
2019-12-01 09:17:07 +01:00
gup.c
gup: document and work around "COW can break either way" issue
2021-04-28 13:16:51 +02:00
highmem.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
hmm.c
mm/memory_hotplug: shrink zones when offlining memory
2020-01-29 16:43:27 +01:00
huge_memory.c
mm/huge_memory.c: don't discard hugepage if other processes are mapping it
2021-07-20 16:15:58 +02:00
hugetlb_cgroup.c
mm: hugetlb: switch to css_tryget() in hugetlb_cgroup_charge_cgroup()
2019-11-20 18:45:20 +01:00
hugetlb.c
hugetlb: fix huge_pmd_unshare address update
2022-06-14 16:59:29 +02:00
hwpoison-inject.c
mm/memory_failure: Remove unused trapno from memory_failure
2018-01-23 12:17:42 -06:00
init-mm.c
mm: Allocate the mm_cpumask (mm->cpu_bitmap[]) dynamically based on nr_cpu_ids
2018-07-17 09:35:30 +02:00
internal.h
mm/thp: fix vma_address() if virtual address below file offset
2021-07-11 12:49:28 +02:00
interval_tree.c
mm/interval_tree.c: use vma_pages() helper
2018-01-31 17:18:37 -08:00
Kconfig
mm/hmm: select mmu notifier when selecting HMM
2019-06-15 11:54:00 +02:00
Kconfig.debug
mm: clarify CONFIG_PAGE_POISONING and usage
2018-08-22 10:52:44 -07:00
khugepaged.c
khugepaged: fix wrong result value for trace_mm_collapse_huge_page_isolate()
2021-05-22 10:59:44 +02:00
kmemleak-test.c
mm: convert printk(KERN_<LEVEL> to pr_<level>
2016-03-17 15:09:34 -07:00
kmemleak.c
mm: kmemleak: take a full lowmem check in kmemleak_*_phys()
2022-04-20 09:12:50 +02:00
ksm.c
ksm: fix potential missing rmap_item for stable_node
2021-05-22 10:59:44 +02:00
list_lru.c
mm: list_lru: set shrinker map bit when child nr_items is not zero
2020-12-11 13:25:02 +01:00
maccess.c
uaccess: Add non-pagefault user-space write function
2020-09-09 19:04:29 +02:00
madvise.c
mm: madvise(MADV_DODUMP): allow hugetlbfs pages
2018-10-05 16:32:05 -07:00
Makefile
vfs: implement readahead(2) using POSIX_FADV_WILLNEED
2018-08-30 20:01:32 +02:00
memblock.c
memblock: use kfree() to release kmalloced memblock regions
2022-03-02 11:38:14 +01:00
memcontrol.c
mm/memcontrol: return 1 from cgroup.memory __setup() handler
2022-04-15 14:14:59 +02:00
memfd.c
memfd: fix F_SEAL_WRITE after shmem huge page allocated
2022-03-08 19:04:10 +01:00
memory_hotplug.c
mm/memory_hotplug: use "unsigned long" for PFN in zone_for_pfn_range()
2021-09-22 11:48:12 +02:00
memory-failure.c
mm/memory-failure: make sure wait for page writeback in memory_failure
2021-06-30 08:48:14 -04:00
memory.c
mm: hugetlb: fix missing cache flush in copy_huge_page_from_user()
2022-05-15 19:41:58 +02:00
mempolicy.c
mm/mempolicy: fix mpol_new leak in shared_policy_replace
2022-04-15 14:15:05 +02:00
mempool.c
mm/mempool.c: add missing parameter description
2018-08-22 10:52:44 -07:00
memtest.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
migrate.c
mm: fix dereference a null pointer in migrate[_huge]_page_move_mapping()
2022-03-23 09:10:42 +01:00
mincore.c
mm/mincore.c: make mincore() more conservative
2019-05-22 07:37:40 +02:00
mlock.c
mm/mlock.c: change count_mm_mlocked_page_nr return type
2019-07-10 09:53:40 +02:00
mm_init.c
mm: access zone->node via zone_to_nid() and zone_set_nid()
2018-08-22 10:52:45 -07:00
mmap.c
mm/mmap: return 1 from stack_guard_gap __setup() handler
2022-04-15 14:14:59 +02:00
mmu_context.c
sched/headers: Prepare to move the task_lock()/unlock() APIs to <linux/sched/task.h>
2017-03-02 08:42:38 +01:00
mmu_notifier.c
mm/mmu_notifier: use hlist_add_head_rcu()
2019-07-31 07:27:08 +02:00
mmzone.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
mprotect.c
mm, numa: fix bad pmd by atomically check for pmd_trans_huge when marking page tables prot_numa
2020-03-11 14:15:00 +01:00
mremap.c
mmmremap.c: avoid pointless invalidate_range_start/end on mremap(old_size=0)
2022-04-15 14:15:05 +02:00
msync.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
nobootmem.c
mm/memblock: add a name for memblock flags enumeration
2018-08-02 12:17:27 -06:00
nommu.c
x86/mm: split vmalloc_sync_all()
2020-03-25 08:06:13 +01:00
oom_kill.c
mm, oom: do not trigger out_of_memory from the #PF
2021-11-26 11:36:17 +01:00
page_alloc.c
mm: page_alloc: fix building error on -Werror=array-compare
2022-04-27 13:39:41 +02:00
page_counter.c
mm/page_counter.c: fix protection usage propagation
2020-08-21 11:05:33 +02:00
page_ext.c
mm/page_ext.c: fix an imbalance with kmemleak
2019-04-05 22:32:58 +02:00
page_idle.c
mm/page_idle.c: fix oops because end_pfn is larger than max_pfn
2019-07-03 13:14:45 +02:00
page_io.c
mm: fix unexpected zeroed page mapping with zram swap
2022-05-12 12:20:25 +02:00
page_isolation.c
mm, migrate: remove reason argument from new_page_t
2018-04-11 10:28:32 -07:00
page_owner.c
mm/page_owner: don't access uninitialized memmaps when reading /proc/pagetypeinfo
2019-10-29 09:19:58 +01:00
page_poison.c
page_poison: play nicely with KASAN
2019-04-05 22:32:59 +02:00
page_vma_mapped.c
mm/thp: another PVMW_SYNC fix in page_vma_mapped_walk()
2021-07-11 12:49:30 +02:00
page-writeback.c
mm/page-writeback.c: avoid potential division by zero in wb_min_max_ratio()
2020-01-23 08:21:31 +01:00
pagewalk.c
mm: pagewalk: fix termination condition in walk_pte_range()
2020-10-01 13:14:32 +02:00
percpu-internal.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
percpu-km.c
percpu: convert spin_lock_irq to spin_lock_irqsave.
2019-02-12 19:47:12 +01:00
percpu-stats.c
treewide: Use array_size() in vmalloc()
2018-06-12 16:19:22 -07:00
percpu-vm.c
percpu: allow select gfp to be passed to underlying allocators
2018-02-18 05:33:01 -08:00
percpu.c
percpu: fix first chunk size calculation for populated bitmap
2020-09-23 12:11:01 +02:00
pgtable-generic.c
mm/thp: fix __split_huge_pmd_locked() on shmem migration entry
2021-07-11 12:49:27 +02:00
process_vm_access.c
mm: docs: add blank lines to silence sphinx "Unexpected indentation" errors
2018-02-06 18:32:48 -08:00
quicklist.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
readahead.c
vfs: implement readahead(2) using POSIX_FADV_WILLNEED
2018-08-30 20:01:32 +02:00
rmap.c
mm: fix race between MADV_FREE reclaim and blkdev direct IO read
2022-04-15 14:15:04 +02:00
rodata_test.c
mm: fix RODATA_TEST failure "rodata_test: test data was not read only"
2017-10-03 17:54:24 -07:00
shmem.c
shmem: fix a race between shmem_unused_huge_shrink and shmem_evict_inode
2022-01-27 09:04:16 +01:00
slab_common.c
mm: slab: fix kmem_cache_create failed when sysfs node not destroyed
2021-07-28 11:13:44 +02:00
slab.c
mm/slab.c: fix an infinite loop in leaks_show()
2019-06-15 11:54:01 +02:00
slab.h
mm: kmemleak: slob: respect SLAB_NOLEAKTRACE flag
2021-11-26 11:36:23 +01:00
slob.c
slab: __GFP_ZERO is incompatible with a constructor
2018-06-07 17:34:34 -07:00
slub.c
mm, slub: fix mismatch between reconstructed freelist depth and cnt
2021-10-27 09:53:14 +02:00
sparse-vmemmap.c
mm/sparse: delete old sparse_init and enable new one
2018-08-17 16:20:32 -07:00
sparse.c
mm/sparse: add the missing sparse_buffer_fini() in error branch
2021-05-22 10:59:38 +02:00
swap_cgroup.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
swap_slots.c
mm, swap, get_swap_pages: use entry_size instead of cluster in parameter
2018-08-22 10:52:44 -07:00
swap_state.c
mm/swap_state: fix a data race in swapin_nr_pages
2020-10-01 13:14:47 +02:00
swap.c
mm/swap: fix release_pages() when releasing devmap pages
2019-07-31 07:27:03 +02:00
swapfile.c
swap: fix swapfile read/write offset
2021-03-07 12:19:02 +01:00
truncate.c
mm/thp: unmap_mapping_page() to fix THP truncate_cleanup_page()
2021-07-11 12:49:28 +02:00
usercopy.c
mm/usercopy: return 1 from hardened_usercopy __setup() handler
2022-04-15 14:14:59 +02:00
userfaultfd.c
mm: userfaultfd: fix missing cache flush in mcopy_atomic_pte() and __mcopy_atomic()
2022-05-15 19:41:58 +02:00
util.c
mm: add kvfree_sensitive() for freeing sensitive data objects
2020-06-22 09:05:01 +02:00
vmacache.c
mm: get rid of vmacache_flush_all() entirely
2018-09-13 15:18:04 -10:00
vmalloc.c
mm/vmalloc.c: don't dereference possible NULL pointer in __vunmap()
2020-06-03 08:19:49 +02:00
vmpressure.c
mm/vmpressure.c: fix a signedness bug in vmpressure_register_event()
2019-10-17 13:45:19 -07:00
vmscan.c
mm/vmscan.c: fix data races using kswapd_classzone_idx
2020-10-01 13:14:41 +02:00
vmstat.c
mm, vmstat: drop zone->lock in /proc/pagetypeinfo
2021-06-03 08:38:02 +02:00
workingset.c
mm/list_lru: introduce list_lru_shrink_walk_irq()
2018-08-17 16:20:32 -07:00
z3fold.c
z3fold: fix possible reclaim races
2018-12-01 09:37:33 +01:00
zbud.c
mm: docs: fix parameter names mismatch
2018-02-06 18:32:48 -08:00
zpool.c
mm/zpool.c: zpool_evictable: fix mismatch in parameter name and kernel-doc
2018-02-21 15:35:43 -08:00
zsmalloc.c
zsmalloc: fix races between asynchronous zspage free and page migration
2022-06-06 08:24:21 +02:00
zswap.c
zswap: re-check zswap_is_full() after do zswap_shrink()
2018-07-26 19:38:03 -07:00