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Wei Yang 9ad9718bfa mm/mremap: calculate extent in one place 
Page tables is moved on the base of PMD.  This requires both source and
destination range should meet the requirement.

Current code works well since move_huge_pmd() and move_normal_pmd() would
check old_addr and new_addr again.  And then return to move_ptes() if the
either of them is not aligned.

Instead of calculating the extent separately, it is better to calculate in
one place, so we know it is not necessary to try move pmd.  By doing so,
the logic seems a little clear.

Signed-off-by: Wei Yang <richard.weiyang@linux.alibaba.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Tested-by: Dmitry Osipenko <digetx@gmail.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Peter Xu <peterx@redhat.com>
Cc: Sean Christopherson <sean.j.christopherson@intel.com>
Cc: Thomas Hellstrom <thellstrom@vmware.com>
Cc: Thomas Hellstrom (VMware) <thomas_os@shipmail.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Yang Shi <yang.shi@linux.alibaba.com>
Link: http://lkml.kernel.org/r/20200708095028.41706-3-richard.weiyang@linux.alibaba.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-08-07 11:33:27 -07:00
..
kasan
mm: remove __ARCH_HAS_5LEVEL_HACK and include/asm-generic/5level-fixup.h
2020-06-04 19:06:21 -07:00
backing-dev.c
writeback: remove struct bdi_writeback_congested
2020-07-08 17:05:53 -06:00
balloon_compaction.c
mm/balloon_compaction: suppress allocation warnings
2019-09-04 07:42:01 -04:00
cleancache.c
Driver Core and debugfs changes for 5.3-rc1
2019-07-12 12:24:03 -07:00
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.c: use exact_nid true to fix possible per-numa cma leak
2020-07-03 16:15:25 -07:00
cma.h
debugfs: make sure we can remove u32_array files cleanly
2020-07-10 13:54:00 -07:00
compaction.c
mm, compaction: make capture control handling safe wrt interrupts
2020-06-26 00:27:36 -07:00
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_vm_pgtable.c
Documentation/mm: add descriptions for arch page table helpers
2020-08-07 11:33:23 -07:00
debug.c
mm, dump_page: do not crash with bad compound_mapcount()
2020-08-07 11:33:23 -07:00
dmapool.c
mm/dmapool.c: micro-optimisation remove unnecessary branch
2020-04-07 10:43:42 -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: return void from various readahead functions
2020-06-02 10:59:06 -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: filemap: add missing FGP_ flags in kerneldoc comment for pagecache_get_page
2020-08-07 11:33:23 -07:00
frame_vector.c
mmap locking API: convert mmap_sem comments
2020-06-09 09:39:14 -07:00
frontswap.c
treewide: Remove uninitialized_var() usage
2020-07-16 12:35:15 -07:00
gup_benchmark.c
mm/gup_benchmark: support pin_user_pages() and related calls
2020-04-02 09:35:27 -07:00
gup.c
mm/gup.c: fix the comment of return value for populate_vma_page_range()
2020-08-07 11:33:23 -07:00
highmem.c
mm, x86/mm: Untangle address space layout definitions from basic pgtable type definitions
2019-12-10 10:12:55 +01:00
hmm.c
mm/hmm: provide the page mapping order in hmm_range_fault()
2020-07-10 16:24:28 -03:00
huge_memory.c
mm/mremap: it is sure to have enough space when extent meets requirement
2020-08-07 11:33:27 -07:00
hugetlb_cgroup.c
mm: use fallthrough;
2020-04-07 10:43:41 -07:00
hugetlb.c
mm: remove unneeded includes of <asm/pgalloc.h>
2020-08-07 11:33:26 -07:00
hwpoison-inject.c
mm/hwpoison-inject: use DEFINE_DEBUGFS_ATTRIBUTE to define debugfs fops
2019-12-01 12:59:09 -08:00
init-mm.c
mmap locking API: add MMAP_LOCK_INITIALIZER
2020-06-09 09:39:14 -07:00
internal.h
mmap locking API: convert mmap_sem comments
2020-06-09 09:39:14 -07:00
interval_tree.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 248
2019-06-19 17:09:08 +02:00
ioremap.c
mm: move p?d_alloc_track to separate header file
2020-08-07 11:33:26 -07:00
Kconfig
docs: move nommu-mmap.txt to admin-guide and rename to ReST
2020-06-26 11:33:35 -06:00
Kconfig.debug
treewide: replace '---help---' in Kconfig files with 'help'
2020-06-14 01:57:21 +09:00
khugepaged.c
khugepaged: fix null-pointer dereference due to race
2020-07-24 12:42:41 -07:00
kmemleak-test.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333
2019-06-05 17:37:06 +02:00
kmemleak.c
mm/kmemleak.c: use address-of operator on section symbols
2020-04-02 09:35:26 -07:00
ksm.c
treewide: Remove uninitialized_var() usage
2020-07-16 12:35:15 -07:00
list_lru.c
mm/list_lru.c: Rename kvfree_rcu() to local variant
2020-06-29 11:59:25 -07:00
maccess.c
maccess: rename probe_user_{read,write} to copy_{from,to}_user_nofault
2020-06-17 10:57:41 -07:00
madvise.c
mmap locking API: convert mmap_sem comments
2020-06-09 09:39:14 -07:00
Makefile
mm: move lib/ioremap.c to mm/
2020-08-07 11:33:26 -07:00
mapping_dirty_helpers.c
mm/mapping_dirty_helpers: update huge page-table entry callbacks
2020-04-02 09:35:29 -07:00
memblock.c
mm/memblock: expose only miminal interface to add/walk physmem
2020-07-10 15:08:09 +02:00
memcontrol.c
mm: memcontrol: don't count limit-setting reclaim as memory pressure
2020-08-07 11:33:26 -07:00
memfd.c
mm: page cache: store only head pages in i_pages
2019-09-24 15:54:08 -07:00
memory_hotplug.c
mm/memory_hotplug.c: fix false softlockup during pfn range removal
2020-06-26 00:27:38 -07:00
memory-failure.c
mm/memory-failure: send SIGBUS(BUS_MCEERR_AR) only to current thread
2020-06-11 18:17:47 -07:00
memory.c
mm/memory.c: make remap_pfn_range() reject unaligned addr
2020-08-07 11:33:26 -07:00
mempolicy.c
treewide: Remove uninitialized_var() usage
2020-07-16 12:35:15 -07:00
mempool.c
docs/core-api/mm: fix return value descriptions in mm/
2019-03-05 21:07:20 -08:00
memremap.c
mm/memremap: set caching mode for PCI P2PDMA memory to WC
2020-04-10 15:36:21 -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/migrate: fix migrate_pgmap_owner w/o CONFIG_MMU_NOTIFIER
2020-08-07 11:33:21 -07:00
mincore.c
mmap locking API: use coccinelle to convert mmap_sem rwsem call sites
2020-06-09 09:39:14 -07:00
mlock.c
mmap locking API: convert mmap_sem comments
2020-06-09 09:39:14 -07:00
mm_init.c
mm: adjust vm_committed_as_batch according to vm overcommit policy
2020-08-07 11:33:26 -07:00
mmap.c
mm: remove unnecessary wrapper function do_mmap_pgoff()
2020-08-07 11:33:27 -07:00
mmu_gather.c
mmap locking API: convert mmap_sem comments
2020-06-09 09:39:14 -07:00
mmu_notifier.c
mmap locking API: convert mmap_sem comments
2020-06-09 09:39:14 -07:00
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
mmap locking API: convert mmap_sem comments
2020-06-09 09:39:14 -07:00
mremap.c
mm/mremap: calculate extent in one place
2020-08-07 11:33:27 -07:00
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: remove unnecessary wrapper function do_mmap_pgoff()
2020-08-07 11:33:27 -07:00
oom_kill.c
mm: memcg: convert vmstat slab counters to bytes
2020-08-07 11:33:24 -07:00
page_alloc.c
mm: memcontrol: account kernel stack per node
2020-08-07 11:33:25 -07:00
page_counter.c
mm/page_counter.c: fix protection usage propagation
2020-08-07 11:33:26 -07:00
page_ext.c
mm/page_ext.c: drop pfn_present() check when onlining
2020-04-07 10:43:40 -07:00
page_idle.c
mm/page_idle.c: skip offline pages
2020-06-08 11:05:55 -07:00
page_io.c
mm/page_io.c: use blk_io_schedule() for avoiding task hung in sync io
2020-08-07 11:33:24 -07:00
page_isolation.c
mm: Allow to offline unmovable PageOffline() pages via MEM_GOING_OFFLINE
2020-06-04 15:36:52 -04:00
page_owner.c
mm: rename gfpflags_to_migratetype to gfp_migratetype for same convention
2020-06-03 20:09:45 -07:00
page_poison.c
mm/page_poison.c: fix a typo in a comment
2019-09-24 15:54:08 -07:00
page_reporting.c
mm/page_reporting: add budget limit on how many pages can be reported per pass
2020-04-07 10:43:39 -07:00
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: explicitly compare pfn for normal, hugetlbfs and THP page
2020-01-31 10:30:38 -08:00
page-writeback.c
mm/page-writeback: fix a typo in comment "effictive"->"effective"
2020-06-04 19:06:24 -07:00
pagewalk.c
mmap locking API: convert mmap_sem comments
2020-06-09 09:39:14 -07:00
percpu-internal.h
percpu: convert chunk hints to be based on pcpu_block_md
2019-03-13 12:25:31 -07:00
percpu-km.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 428
2019-06-05 17:37:16 +02:00
percpu-stats.c
percpu: update copyright emails to dennis@kernel.org
2020-04-01 10:09:12 -07:00
percpu-vm.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 428
2019-06-05 17:37:16 +02:00
percpu.c
treewide: Remove uninitialized_var() usage
2020-07-16 12:35:15 -07:00
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: introduce include/linux/pgtable.h
2020-06-09 09:39:13 -07:00
process_vm_access.c
mmap locking API: use coccinelle to convert mmap_sem rwsem call sites
2020-06-09 09:39:14 -07:00
ptdump.c
mmap locking API: use coccinelle to convert mmap_sem rwsem call sites
2020-06-09 09:39:14 -07:00
readahead.c
mm: use memalloc_nofs_save in readahead path
2020-06-02 10:59:07 -07:00
rmap.c
mmap locking API: convert mmap_sem comments
2020-06-09 09:39:14 -07:00
rodata_test.c
maccess: rename probe_kernel_{read,write} to copy_{from,to}_kernel_nofault
2020-06-17 10:57:41 -07:00
shmem.c
mm: remove unnecessary wrapper function do_mmap_pgoff()
2020-08-07 11:33:27 -07:00
shuffle.c
mm/shuffle: don't move pages between zones and don't read garbage memmaps
2020-08-07 11:33:21 -07:00
shuffle.h
mm: adjust shuffle code to allow for future coalescing
2020-04-07 10:43:38 -07:00
slab_common.c
mm: memcg/slab: use a single set of kmem_caches for all allocations
2020-08-07 11:33:25 -07:00
slab.c
mm: slab: rename (un)charge_slab_page() to (un)account_slab_page()
2020-08-07 11:33:25 -07:00
slab.h
mm: slab: rename (un)charge_slab_page() to (un)account_slab_page()
2020-08-07 11:33:25 -07:00
slob.c
mm: memcg: convert vmstat slab counters to bytes
2020-08-07 11:33:24 -07:00
slub.c
mm: slab: rename (un)charge_slab_page() to (un)account_slab_page()
2020-08-07 11:33:25 -07:00
sparse-vmemmap.c
mm/sparsemem: enable vmem_altmap support in vmemmap_alloc_block_buf()
2020-08-07 11:33:27 -07:00
sparse.c
mm: remove unneeded includes of <asm/pgalloc.h>
2020-08-07 11:33:26 -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 check for swap_slot_cache_initialized
2020-08-07 11:33:24 -07:00
swap_state.c
mm: swap: fix kerneldoc of swap_vma_readahead()
2020-08-07 11:33:24 -07:00
swap.c
treewide: Remove uninitialized_var() usage
2020-07-16 12:35:15 -07:00
swapfile.c
block: remove the bd_queue field from struct block_device
2020-07-01 08:08:20 -06:00
truncate.c
mm/thp: allow dropping THP from page cache
2019-10-19 06:32:33 -04:00
usercopy.c
usercopy: Avoid HIGHMEM pfn warning
2019-09-17 15:20:17 -07:00
userfaultfd.c
mmap locking API: convert mmap_sem comments
2020-06-09 09:39:14 -07:00
util.c
mm: remove unnecessary wrapper function do_mmap_pgoff()
2020-08-07 11:33:27 -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: move p?d_alloc_track to separate header file
2020-08-07 11:33:26 -07:00
vmpressure.c
mm: vmpressure: use mem_cgroup_is_root API
2020-04-02 09:35:31 -07:00
vmscan.c
mm: memcontrol: don't count limit-setting reclaim as memory pressure
2020-08-07 11:33:26 -07:00
vmstat.c
mm: memcontrol: account kernel stack per node
2020-08-07 11:33:25 -07:00
workingset.c
mm: memcg: convert vmstat slab counters to bytes
2020-08-07 11:33:24 -07:00
z3fold.c
mm/z3fold: silence kmemleak false positives of slots
2020-05-28 11:35:40 -07:00
zbud.c
mm: use false for bool variable
2020-06-04 19:06:24 -07:00
zpool.c
zpool: add malloc_support_movable to zpool_driver
2019-09-24 15:54:12 -07:00
zsmalloc.c
mm: reorder includes after introduction of linux/pgtable.h
2020-06-09 09:39:13 -07:00
zswap.c
mm/zswap: allow setting default status, compressor and allocator in Kconfig
2020-04-07 10:43:41 -07:00