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Muchun Song cf1222b877 mm/page_alloc: speed up the iteration of max_order 
commit 7ad69832f37e3cea8557db6df7c793905f1135e8 upstream.

When we free a page whose order is very close to MAX_ORDER and greater
than pageblock_order, it wastes some CPU cycles to increase max_order to
MAX_ORDER one by one and check the pageblock migratetype of that page
repeatedly especially when MAX_ORDER is much larger than pageblock_order.

We also should not be checking migratetype of buddy when "order ==
MAX_ORDER - 1" as the buddy pfn may be invalid, so adjust the condition.
With the new check, we don't need the max_order check anymore, so we
replace it.

Also adjust max_order initialization so that it's lower by one than
previously, which makes the code hopefully more clear.

Link: https://lkml.kernel.org/r/20201204155109.55451-1-songmuchun@bytedance.com
Fixes: d9dddbf556 ("mm/page_alloc: prevent merging between isolated and other pageblocks")
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Reviewed-by: David Hildenbrand <david@redhat.com>
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>
 		2021-09-12 08:56:41 +02:00
..
kasan kasan: fix incorrect arguments passing in kasan_add_zero_shadow 2021-01-27 11:47:53 +01:00
Kconfig mm/zsmalloc.c: drop ZSMALLOC_PGTABLE_MAPPING 2020-12-16 10:56:59 +01:00
Kconfig.debug
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Makefile
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backing-dev.c bdi: add a ->dev_name field to struct backing_dev_info 2020-05-14 07:58:30 +02:00
balloon_compaction.c
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cleancache.c
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cma.c cma: don't quit at first error when activating reserved areas 2020-09-03 11:26:51 +02:00
cma.h
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cma_debug.c
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compaction.c mm/compaction: fix misbehaviors of fast_find_migrateblock() 2021-03-04 10:26:39 +01:00
debug.c mm/debug.c: always print flags in dump_page() 2020-03-05 16:43:51 +01:00
debug_page_ref.c
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dmapool.c
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early_ioremap.c
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fadvise.c
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failslab.c
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filemap.c mm/filemap: fix storing to a THP shadow entry 2021-06-10 13:37:15 +02:00
frame_vector.c
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frontswap.c
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gup.c mm/gup: fix gup_fast with dynamic page table folding 2020-10-01 13:18:24 +02:00
gup_benchmark.c mm/gup: fix memory leak in __gup_benchmark_ioctl 2020-01-09 10:20:00 +01:00
highmem.c
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hmm.c
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huge_memory.c mm/huge_memory.c: don't discard hugepage if other processes are mapping it 2021-07-14 16:53:47 +02:00
hugetlb.c mm, futex: fix shared futex pgoff on shmem huge page 2021-06-30 08:47:55 -04:00
hugetlb_cgroup.c
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hwpoison-inject.c
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init-mm.c
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internal.h mm/thp: fix vma_address() if virtual address below file offset 2021-06-30 08:47:52 -04:00
interval_tree.c
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khugepaged.c khugepaged: fix wrong result value for trace_mm_collapse_huge_page_isolate() 2021-05-19 10:08:27 +02:00
kmemleak-test.c
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kmemleak.c mm/kmemleak.c: use address-of operator on section symbols 2020-10-01 13:17:53 +02:00
ksm.c ksm: fix potential missing rmap_item for stable_node 2021-05-19 10:08:27 +02:00
list_lru.c mm: list_lru: set shrinker map bit when child nr_items is not zero 2020-12-11 13:23:31 +01:00
maccess.c uaccess: Add non-pagefault user-space write function 2020-01-17 19:48:40 +01:00
madvise.c mm: validate pmd after splitting 2020-10-01 13:18:21 +02:00
memblock.c memblock: do not start bottom-up allocations with kernel_end 2021-02-10 09:25:28 +01:00
memcontrol.c mm, memcg: avoid stale protection values when cgroup is above protection 2021-08-26 08:36:22 -04:00
memfd.c
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memory-failure.c mm/memory-failure: make sure wait for page writeback in memory_failure 2021-06-23 14:41:23 +02:00
memory.c mm/thp: unmap_mapping_page() to fix THP truncate_cleanup_page() 2021-06-30 08:47:53 -04:00
memory_hotplug.c mm: don't rely on system state to detect hot-plug operations 2020-10-07 08:01:30 +02:00
mempolicy.c mm: mempolicy: fix potential pte_unmap_unlock pte error 2020-11-10 12:37:27 +01:00
mempool.c
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memremap.c mm/memory_hotplug: shrink zones when offlining memory 2020-01-09 10:19:56 +01:00
memtest.c
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migrate.c mm, thp: use head page in __migration_entry_wait() 2021-06-30 08:47:52 -04:00
mincore.c
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mlock.c
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mm_init.c
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mmap.c mm/mmap.c: initialize align_offset explicitly for vm_unmapped_area 2020-10-01 13:17:54 +02:00
mmu_context.c mm: fix kthread_use_mm() vs TLB invalidate 2020-09-03 11:26:51 +02:00
mmu_gather.c mm/mmu_gather: invalidate TLB correctly on batch allocation failure and flush 2020-02-11 04:35:42 -08:00
mmu_notifier.c
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mmzone.c
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mprotect.c mm, numa: fix bad pmd by atomically check for pmd_trans_huge when marking page tables prot_numa 2020-03-12 13:00:19 +01:00
mremap.c mm: Fix mremap not considering huge pmd devmap 2020-06-07 13:18:46 +02:00
msync.c
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nommu.c x86/mm: split vmalloc_sync_all() 2020-03-25 08:25:58 +01:00
oom_kill.c mm, oom: make the calculation of oom badness more accurate 2021-09-03 10:08:12 +02:00
page-writeback.c mm/page-writeback.c: avoid potential division by zero in wb_min_max_ratio() 2020-01-23 08:22:41 +01:00
page_alloc.c mm/page_alloc: speed up the iteration of max_order 2021-09-12 08:56:41 +02:00
page_counter.c mm/page_counter.c: fix protection usage propagation 2020-08-21 13:05:27 +02:00
page_ext.c
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page_idle.c
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page_io.c swap: fix swapfile read/write offset 2021-03-07 12:20:49 +01:00
page_isolation.c mm/memory_hotplug: drain per-cpu pages again during memory offline 2020-09-23 12:40:47 +02:00
page_owner.c mm/page_owner: change split_page_owner to take a count 2020-10-29 09:57:52 +01:00
page_poison.c
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page_vma_mapped.c mm/thp: another PVMW_SYNC fix in page_vma_mapped_walk() 2021-06-30 08:47:55 -04:00
pagewalk.c mm: pagewalk: fix termination condition in walk_pte_range() 2020-10-01 13:17:30 +02:00
percpu-internal.h
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percpu-km.c
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percpu-stats.c
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percpu-vm.c
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percpu.c percpu: fix first chunk size calculation for populated bitmap 2020-09-23 12:40:45 +02:00
pgtable-generic.c mm/thp: fix __split_huge_pmd_locked() on shmem migration entry 2021-06-30 08:47:52 -04:00
process_vm_access.c
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readahead.c
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rmap.c mm/thp: fix page_address_in_vma() on file THP tails 2021-06-30 08:47:53 -04:00
rodata_test.c
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shmem.c mm/hugetlb: fix F_SEAL_FUTURE_WRITE 2021-05-19 10:08:29 +02:00
shuffle.c mm/shuffle: don't move pages between zones and don't read garbage memmaps 2020-09-03 11:26:51 +02:00
shuffle.h
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slab.c mm, debug_pagealloc: don't rely on static keys too early 2020-01-23 08:22:40 +01:00
slab.h
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slab_common.c mm: slab: fix kmem_cache_create failed when sysfs node not destroyed 2021-07-25 14:35:14 +02:00
slob.c
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slub.c mm/slub.c: include swab.h 2021-06-23 14:41:30 +02:00
sparse-vmemmap.c
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sparse.c mm/sparse: add the missing sparse_buffer_fini() in error branch 2021-05-14 09:44:32 +02:00
swap.c
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swap_cgroup.c
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swap_slots.c
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swap_state.c mm/swap_state: fix a data race in swapin_nr_pages 2020-10-01 13:18:08 +02:00
swapfile.c swap: fix swapfile read/write offset 2021-03-07 12:20:49 +01:00
truncate.c mm/thp: unmap_mapping_page() to fix THP truncate_cleanup_page() 2021-06-30 08:47:53 -04:00
usercopy.c
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userfaultfd.c hugetlbfs: hugetlb_fault_mutex_hash() cleanup 2021-03-30 14:35:19 +02:00
util.c mm: add kvfree_sensitive() for freeing sensitive data objects 2020-06-17 16:40:23 +02:00
vmacache.c
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vmalloc.c mm/vunmap: add cond_resched() in vunmap_pmd_range 2020-09-03 11:26:52 +02:00
vmpressure.c
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vmscan.c mm: memcontrol: fix occasional OOMs due to proportional memory.low reclaim 2021-08-26 08:36:22 -04:00
vmstat.c
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workingset.c
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z3fold.c mm/z3fold: fix potential memory leak in z3fold_destroy_pool() 2021-07-14 16:53:47 +02:00
zbud.c
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zpool.c
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zsmalloc.c zsmalloc: account the number of compacted pages correctly 2021-03-07 12:20:49 +01:00
zswap.c
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