Li Xinhai a1ba9da8f0 mm/hugetlb.c: fix unnecessary address expansion of pmd sharing ... The current code would unnecessarily expand the address range. Consider one example, (start, end) = (1G-2M, 3G+2M), and (vm_start, vm_end) = (1G-4M, 3G+4M), the expected adjustment should be keep (1G-2M, 3G+2M) without expand. But the current result will be (1G-4M, 3G+4M). Actually, the range (1G-4M, 1G) and (3G, 3G+4M) would never been involved in pmd sharing. After this patch, we will check that the vma span at least one PUD aligned size and the start,end range overlap the aligned range of vma. With above example, the aligned vma range is (1G, 3G), so if (start, end) range is within (1G-4M, 1G), or within (3G, 3G+4M), then no adjustment to both start and end. Otherwise, we will have chance to adjust start downwards or end upwards without exceeding (vm_start, vm_end). Mike: : The 'adjusted range' is used for calls to mmu notifiers and cache(tlb) : flushing. Since the current code unnecessarily expands the range in some : cases, more entries than necessary would be flushed. This would/could : result in performance degradation. However, this is highly dependent on : the user runtime. Is there a combination of vma layout and calls to : actually hit this issue? If the issue is hit, will those entries : unnecessarily flushed be used again and need to be unnecessarily reloaded? Link: https://lkml.kernel.org/r/20210104081631.2921415-1-lixinhai.lxh@gmail.com Fixes: 75802ca663 ("mm/hugetlb: fix calculation of adjust_range_if_pmd_sharing_possible") Signed-off-by: Li Xinhai <lixinhai.lxh@gmail.com> Suggested-by: Mike Kravetz <mike.kravetz@oracle.com> Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com> Cc: Peter Xu <peterx@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2021-02-24 13:38:32 -08:00
..
kasan	kasan: fix bug detection via ksize for HW_TAGS mode	2021-02-24 13:38:31 -08:00
backing-dev.c	mm: backing-dev: Remove duplicated macro definition	2021-02-24 13:38:28 -08:00
balloon_compaction.c
cleancache.c
cma_debug.c	debugfs: make sure we can remove u32_array files cleanly	2020-07-10 13:54:00 -07:00
cma.c	mm: cma: improve pr_debug log in cma_release()	2020-12-15 12:13:46 -08:00
cma.h	mm: cma: use CMA_MAX_NAME to define the length of cma name array	2020-09-01 09:19:43 +02:00
compaction.c	mm, compaction: move high_pfn to the for loop scope	2021-02-05 11:03:47 -08:00
debug_page_ref.c
debug_vm_pgtable.c	mm/debug_vm_pgtable/basic: iterate over entire protection_map[]	2021-02-24 13:38:27 -08:00
debug.c	mm/debug: improve memcg debugging	2021-02-24 13:38:27 -08:00
dmapool.c	mm/dmapool.c: replace hard coded function name with __func__	2020-10-13 18:38:32 -07:00
early_ioremap.c	mm/early_ioremap.c: use %pa to print resource_size_t variables	2020-01-31 10:30:38 -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	mm: memcontrol: convert NR_SHMEM_THPS account to pages	2021-02-24 13:38:29 -08:00
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	Merge branch 'akpm' (patches from Andrew)	2020-12-15 12:53:37 -08:00
highmem.c	mm/highmem: prepare for overriding set_pte_at()	2021-01-24 10:34:52 -08:00
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.c: update tlb entry if pmd is changed	2021-02-24 13:38:32 -08:00
hugetlb_cgroup.c	hugetlb_cgroup: fix offline of hugetlb cgroup with reservations	2020-12-06 10:19:07 -08:00
hugetlb.c	mm/hugetlb.c: fix unnecessary address expansion of pmd sharing	2021-02-24 13:38:32 -08:00
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: disable pcplists during memory offline	2020-12-15 12:13:43 -08:00
interval_tree.c
ioremap.c	mm: move p?d_alloc_track to separate header file	2020-08-07 11:33:26 -07:00
Kconfig	media: videobuf2: Move frame_vector into media subsystem	2021-01-12 14:15:31 +01:00
Kconfig.debug	mm, page_poison: remove CONFIG_PAGE_POISONING_ZERO	2020-12-15 12:13:46 -08:00
khugepaged.c	mm: memcontrol: convert NR_SHMEM_THPS account to pages	2021-02-24 13:38:29 -08:00
kmemleak.c	mm/kmemleak: rely on rcu for task stack scanning	2020-10-13 18:38:27 -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	idmapped-mounts-v5.12	2021-02-23 13:39:45 -08:00
Makefile	media: videobuf2: Move frame_vector into media subsystem	2021-01-12 14:15:31 +01:00
mapping_dirty_helpers.c	mm/mapping_dirty_helpers: enhance the kernel-doc markups	2020-12-15 12:13:41 -08:00
memblock.c	memblock: remove return value of memblock_free_all()	2021-02-22 13:01:23 -08:00
memcontrol.c	mm: memcontrol: fix get_active_memcg return value	2021-02-24 13:38:30 -08:00
memfd.c
memory_hotplug.c	mm: rename memmap_init() and memmap_init_zone()	2021-02-24 13:38:31 -08:00
memory-failure.c	mm,hwpoison: send SIGBUS to PF_MCE_EARLY processes on action required events	2021-02-24 13:38:32 -08:00
memory.c	mm/memory.c: fix potential pte_unmap_unlock pte error	2021-02-24 13:38:30 -08:00
mempolicy.c	mm: migrate: initialize err in do_migrate_pages	2021-01-12 18:12:54 -08:00
mempool.c	kasan: move _RET_IP_ to inline wrappers	2021-02-24 13:38:31 -08:00
memremap.c	mm/mremap_pages: fix static key devmap_managed_key updates	2020-11-02 12:14:18 -08:00
memtest.c
migrate.c	mm: memcg: add swapcache stat for memcg v2	2021-02-24 13:38:29 -08:00
mincore.c	inode: make init and permission helpers idmapped mount aware	2021-01-24 14:27:16 +01:00
mlock.c	mm/lru: introduce relock_page_lruvec()	2020-12-15 14:48:04 -08:00
mm_init.c	mm: fix fall-through warnings for Clang	2020-12-15 12:13:47 -08:00
mmap_lock.c	mm: mmap_lock: add tracepoints around lock acquisition	2020-12-15 12:13:41 -08:00
mmap.c	mm/mmap.c: remove unnecessary local variable	2021-02-24 13:38:30 -08:00
mmu_gather.c	tlb: mmu_gather: Remove start/end arguments from tlb_gather_mmu()	2021-01-29 20:02:29 +01:00
mmu_notifier.c	mm: track mmu notifiers in fs_reclaim_acquire/release	2020-12-15 12:13:41 -08:00
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	mm: mremap: unlink anon_vmas when mremap with MREMAP_DONTUNMAP success	2021-02-24 13:38:30 -08:00
msync.c	mmap locking API: use coccinelle to convert mmap_sem rwsem call sites	2020-06-09 09:39:14 -07:00
nommu.c	mm/nommu: Fix return type of filemap_map_pages()	2021-01-28 14:10:31 +00:00
oom_kill.c	tlb: mmu_gather: Remove start/end arguments from tlb_gather_mmu()	2021-01-29 20:02:29 +01:00
page_alloc.c	mm: simplify free_highmem_page() and free_reserved_page()	2021-02-24 13:38:32 -08:00
page_counter.c	mm/page_counter: use page_counter_read in page_counter_set_max	2020-12-15 12:13:40 -08:00
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	mm/page_io: use pr_alert_ratelimited for swap read/write errors	2021-02-24 13:38:29 -08:00
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: use helper function zone_end_pfn() to get end_pfn	2021-02-24 13:38:27 -08:00
page_poison.c	kasan, mm: reset tags when accessing metadata	2020-12-22 12:55:08 -08:00
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	mm: introduce include/linux/pgtable.h	2020-06-09 09:39:13 -07:00
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: make wait_on_page_writeback() wait for multiple pending writebacks	2021-01-05 11:33:00 -08:00
pagewalk.c	mmap locking API: convert mmap_sem comments	2020-06-09 09:39:14 -07:00
percpu-internal.h	mm: memcg/percpu: account percpu memory to memory cgroups	2020-08-12 10:57:55 -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	mm: memcg/percpu: account percpu memory to memory cgroups	2020-08-12 10:57:55 -07:00
percpu-vm.c	mm: memcg/percpu: account percpu memory to memory cgroups	2020-08-12 10:57:55 -07:00
percpu.c	percpu: fix clang modpost section mismatch	2021-02-14 18:15:15 +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	kasan, arm64: expand CONFIG_KASAN checks	2020-12-22 12:55:08 -08:00
readahead.c	mm: use limited read-ahead to satisfy read	2020-10-17 13:49:08 -06:00
rmap.c	mm: rmap: explicitly reset vma->anon_vma in unlink_anon_vmas()	2021-02-24 13:38:30 -08:00
rodata_test.c	mm/rodata_test.c: fix missing function declaration	2020-08-21 09:52:53 -07:00
shmem.c	mm: memcontrol: convert NR_SHMEM_THPS account to pages	2021-02-24 13:38:29 -08:00
shuffle.c	mm: rename page_order() to buddy_order()	2020-10-16 11:11:19 -07:00
shuffle.h	mm/shuffle: remove dynamic reconfiguration	2020-08-07 11:33:29 -07:00
slab_common.c	kasan: fix bug detection via ksize for HW_TAGS mode	2021-02-24 13:38:31 -08:00
slab.c	kasan: move _RET_IP_ to inline wrappers	2021-02-24 13:38:31 -08:00
slab.h	mm: memcg/slab: pre-allocate obj_cgroups for slab caches with SLAB_ACCOUNT	2021-02-24 13:38:29 -08:00
slob.c	mm, tracing: record slab name for kmem_cache_free()	2021-02-24 13:38:26 -08:00
slub.c	kasan: move _RET_IP_ to inline wrappers	2021-02-24 13:38:31 -08:00
sparse-vmemmap.c	mm/sparse: only sub-section aligned range would be populated	2020-08-07 11:33:27 -07:00
sparse.c	mm/memory_hotplug: guard more declarations by CONFIG_MEMORY_HOTPLUG	2020-10-16 11:11:18 -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: remove redundant NULL check	2021-02-24 13:38:28 -08:00
swap_state.c	mm: memcg: add swapcache stat for memcg v2	2021-02-24 13:38:29 -08:00
swap.c	mm/lru: introduce relock_page_lruvec()	2020-12-15 14:48:04 -08:00
swapfile.c	mm/swapfile.c: fix debugging information problem	2021-02-24 13:38:28 -08:00
truncate.c	mm: fix kernel-doc markups	2020-12-15 12:13:47 -08:00
usercopy.c	mm/usercopy.c: delete duplicated word	2020-08-12 10:57:58 -07:00
userfaultfd.c	mm/vmscan: protect the workingset on anonymous LRU	2020-08-12 10:57:55 -07:00
util.c	mm: Make mem_dump_obj() handle vmalloc() memory	2021-01-22 15:24:04 -08:00
vmacache.c	kernel: better document the use_mm/unuse_mm API contract	2020-06-10 19:14:18 -07:00
vmalloc.c	Merge branch 'for-mingo-rcu' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu	2021-02-12 12:56:55 +01:00
vmpressure.c	mm: vmpressure: use mem_cgroup_is_root API	2020-04-02 09:35:31 -07:00
vmscan.c	mm: don't put pinned pages into the swap cache	2021-01-17 12:08:04 -08:00
vmstat.c	mm: memcg: add swapcache stat for memcg v2	2021-02-24 13:38:29 -08:00
workingset.c	Merge branch 'akpm' (patches from Andrew)	2020-12-15 14:55:10 -08:00
z3fold.c	z3fold: remove preempt disabled sections for RT	2020-12-15 12:13:45 -08:00
zbud.c	mm/zbud: remove redundant initialization	2020-10-13 18:38:34 -07:00
zpool.c	mm/zpool.c: delete duplicated word and fix grammar	2020-08-12 10:57:58 -07:00
zsmalloc.c	mm/zsmalloc.c: rework the list_add code in insert_zspage()	2020-12-15 12:13:46 -08:00
zswap.c	mm/zswap: move to use crypto_acomp API for hardware acceleration	2020-12-15 12:13:46 -08:00