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Baoquan He 30a7a9b17c mm/vmalloc: skip the uninitilized vmalloc areas 
For areas allocated via vmalloc_xxx() APIs, it searches for unmapped area
to reserve and allocates new pages to map into, please see function
__vmalloc_node_range().  During the process, flag VM_UNINITIALIZED is set
in vm->flags to indicate that the pages allocation and mapping haven't
been done, until clear_vm_uninitialized_flag() is called to clear
VM_UNINITIALIZED.

For this kind of area, if VM_UNINITIALIZED is still set, let's ignore it
in vread() because pages newly allocated and being mapped in that area
only contains zero data.  reading them out by aligned_vread() is wasting
time.

Link: https://lkml.kernel.org/r/20230206084020.174506-6-bhe@redhat.com
Signed-off-by: Baoquan He <bhe@redhat.com>
Reviewed-by: Lorenzo Stoakes <lstoakes@gmail.com>
Reviewed-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Cc: Dan Carpenter <error27@gmail.com>
Cc: Stephen Brennan <stephen.s.brennan@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-02-09 16:51:43 -08:00
..
damon
mm/damon/vaddr-test.h: stop using vma_mas_store() for maple tree store
2023-02-09 16:51:35 -08:00
kasan
kasan: infer allocation size by scanning metadata
2023-02-09 16:51:40 -08:00
kfence
hardening updates for v6.2-rc1
2022-12-14 12:20:00 -08:00
kmsan
kmsan: silence -Wmissing-prototypes warnings
2023-02-02 22:33:05 -08:00
backing-dev.c
mm: add /sys/class/bdi/<bdi>/min_ratio_fine knob
2022-11-30 15:59:06 -08:00
balloon_compaction.c
mm: Convert all PageMovable users to movable_operations
2022-08-02 12:34:03 -04:00
bootmem_info.c
bootmem: remove the vmemmap pages from kmemleak in put_page_bootmem
2022-08-28 14:02:45 -07:00
cma_debug.c
mm/cma_debug: show complete cma name in debugfs directories
2022-09-11 20:25:50 -07:00
cma_sysfs.c
…
cma.c
mm/cma: fix potential memory loss on cma_declare_contiguous_nid
2023-02-02 22:33:24 -08:00
cma.h
…
compaction.c
mm, compaction: finish pageblocks on complete migration failure
2023-02-02 22:33:30 -08:00
debug_page_ref.c
…
debug_vm_pgtable.c
mm: remove __HAVE_ARCH_PTE_SWP_EXCLUSIVE
2023-02-02 22:33:11 -08:00
debug.c
mm: export dump_mm()
2023-02-09 16:51:40 -08:00
dmapool.c
…
early_ioremap.c
…
fadvise.c
mm: support POSIX_FADV_NOREUSE
2023-01-18 17:12:57 -08:00
failslab.c
mm: fix unexpected changes to {failslab|fail_page_alloc}.attr
2022-11-22 18:50:44 -08:00
filemap.c
filemap: add mapping_read_folio_gfp()
2023-02-09 16:51:42 -08:00
folio-compat.c
mm: add folio_add_new_anon_rmap()
2023-02-02 22:32:56 -08:00
frontswap.c
frontswap: don't call ->init if no ops are registered
2022-09-26 12:14:34 -07:00
gup_test.c
mm/gup_test: free memory allocated via kvcalloc() using kvfree()
2022-12-15 16:37:48 -08:00
gup_test.h
mm/gup_test: start/stop/read functionality for PIN LONGTERM test
2022-11-08 17:37:15 -08:00
gup.c
mm/gup.c: fix typo in comments
2023-02-02 22:33:29 -08:00
highmem.c
highmem: fix kmap_to_page() for kmap_local_page() addresses
2022-10-12 18:51:51 -07:00
hmm.c
mm/hugetlb: make walk_hugetlb_range() safe to pmd unshare
2023-01-18 17:12:39 -08:00
huge_memory.c
mm: fix khugepaged with shmem_enabled=advise
2023-02-02 22:33:13 -08:00
hugetlb_cgroup.c
mm/hugeltb_cgroup: convert hugetlb_cgroup_commit_charge*() to folios
2022-11-30 15:58:43 -08:00
hugetlb_vmemmap.c
mm/hugetlb_vmemmap: remap head page to newly allocated page
2022-11-30 15:58:47 -08:00
hugetlb_vmemmap.h
mm: hugetlb_vmemmap: improve hugetlb_vmemmap code readability
2022-08-08 18:06:43 -07:00
hugetlb.c
mm: replace VM_LOCKED_CLEAR_MASK with VM_LOCKED_MASK
2023-02-09 16:51:39 -08:00
hwpoison-inject.c
mm/hwpoison: add __init/__exit annotations to module init/exit funcs
2022-10-03 14:03:05 -07:00
init-mm.c
mm: remove rb tree.
2022-09-26 19:46:16 -07:00
internal.h
mm/mmap: refactor locking out of __vma_adjust()
2023-02-09 16:51:37 -08:00
interval_tree.c
…
io-mapping.c
…
ioremap.c
mm: ioremap: Add ioremap/iounmap_allowed()
2022-06-27 12:22:31 +01:00
Kconfig
zsmalloc: set default zspage chain size to 8
2023-02-02 22:33:23 -08:00
Kconfig.debug
mm: move KMEMLEAK's Kconfig items from lib to mm
2023-02-02 22:33:26 -08:00
khugepaged.c
mm/khugepaged: convert release_pte_pages() to use folios
2023-02-02 22:33:05 -08:00
kmemleak.c
mm/kmemleak: fix UAF bug in kmemleak_scan()
2023-02-02 22:33:25 -08:00
ksm.c
mm/mmu_notifier: remove unused mmu_notifier_range_update_to_read_only export
2023-02-02 22:32:54 -08:00
list_lru.c
mm: kmem: make mem_cgroup_from_obj() vmalloc()-safe
2022-06-16 19:48:31 -07:00
maccess.c
maccess: Fix writing offset in case of fault in strncpy_from_kernel_nofault()
2022-11-11 11:44:46 -08:00
madvise.c
mm: replace vma->vm_flags direct modifications with modifier calls
2023-02-09 16:51:39 -08:00
Makefile
mm: memcontrol: drop dead CONFIG_MEMCG_SWAP config symbol
2022-10-03 14:03:36 -07:00
mapping_dirty_helpers.c
mm/mmu_notifier: remove unused mmu_notifier_range_update_to_read_only export
2023-02-02 22:32:54 -08:00
memblock.c
mm: Always release pages to the buddy allocator in memblock_free_late().
2023-01-08 18:49:33 +02:00
memcontrol.c
mm: multi-gen LRU: section for memcg LRU
2023-02-02 22:33:27 -08:00
memfd.c
mm/memfd: add write seals when apply SEAL_EXEC to executable memfd
2023-01-18 17:12:37 -08:00
memory_hotplug.c
mm: add pageblock_aligned() macro
2022-10-03 14:03:04 -07:00
memory-failure.c
mm: memory-failure: bump memory failure stats to pglist_data
2023-02-02 22:33:28 -08:00
memory-tiers.c
memory tier: release the new_memtier in find_create_memory_tier()
2023-02-09 16:51:40 -08:00
memory.c
mm: introduce __vm_flags_mod and use it in untrack_pfn
2023-02-09 16:51:40 -08:00
mempolicy.c
mm: switch vma_merge(), split_vma(), and __split_vma to vma iterator
2023-02-09 16:51:35 -08:00
mempool.c
mempool: do not use ksize() for poisoning
2022-11-30 15:58:41 -08:00
memremap.c
mm: introduce __vm_flags_mod and use it in untrack_pfn
2023-02-09 16:51:40 -08:00
memtest.c
…
migrate_device.c
mm/mmu_notifier: remove unused mmu_notifier_range_update_to_read_only export
2023-02-02 22:32:54 -08:00
migrate.c
mm: mlock: update the interface to use folios
2023-02-02 22:33:04 -08:00
mincore.c
mm: convert find_get_incore_page() to filemap_get_incore_folio()
2022-11-08 17:37:18 -08:00
mlock.c
mm: introduce vm_flags_reset_once to replace WRITE_ONCE vm_flags updates
2023-02-09 16:51:41 -08:00
mm_init.c
memory: move hotplug memory notifier priority to same file for easy sorting
2022-11-08 17:37:17 -08:00
mm_slot.h
mm: introduce common struct mm_slot
2022-10-03 14:02:43 -07:00
mmap_lock.c
…
mmap.c
mm: introduce __vm_flags_mod and use it in untrack_pfn
2023-02-09 16:51:40 -08:00
mmu_gather.c
mm: mmu_gather: allow more than one batch of delayed rmaps
2022-12-11 18:12:21 -08:00
mmu_notifier.c
mm/mmu_notifier: remove unused mmu_notifier_range_update_to_read_only export
2023-02-02 22:32:54 -08:00
mmzone.c
mm: multi-gen LRU: groundwork
2022-09-26 19:46:09 -07:00
mprotect.c
mm: replace vma->vm_flags direct modifications with modifier calls
2023-02-09 16:51:39 -08:00
mremap.c
mm: replace vma->vm_flags direct modifications with modifier calls
2023-02-09 16:51:39 -08:00
msync.c
mm/msync: use vma_find() instead of vma linked list
2022-09-26 19:46:25 -07:00
nommu.c
mm: replace vma->vm_flags direct modifications with modifier calls
2023-02-09 16:51:39 -08:00
oom_kill.c
mm/mmu_notifier: remove unused mmu_notifier_range_update_to_read_only export
2023-02-02 22:32:54 -08:00
page_alloc.c
mm/page_alloc: reduce fallbacks to (MIGRATE_PCPTYPES - 1)
2023-02-09 16:51:41 -08:00
page_counter.c
mm: page_counter: remove unneeded atomic ops for low/min
2022-09-11 20:26:01 -07:00
page_ext.c
mm/page_ext: init page_ext early if there are no deferred struct pages
2023-02-02 22:33:22 -08:00
page_idle.c
mm: page_idle: convert page idle to use a folio
2023-01-18 17:12:52 -08:00
page_io.c
block: remove ->rw_page
2023-02-02 22:33:34 -08:00
page_isolation.c
mm/page_isolation: fix clang deadcode warning
2022-10-28 13:37:22 -07:00
page_owner.c
mm/page_owner: record single timestamp value for high order allocations
2023-02-02 22:33:28 -08:00
page_poison.c
…
page_reporting.c
mm/page_reporting: replace rcu_access_pointer() with rcu_dereference_protected()
2023-01-18 17:12:50 -08:00
page_reporting.h
…
page_table_check.c
mm/page_ext: do not allocate space for page_ext->flags if not needed
2023-02-02 22:33:11 -08:00
page_vma_mapped.c
mm/hugetlb: introduce hugetlb_walk()
2023-01-18 17:12:39 -08:00
page-writeback.c
fs: convert writepage_t callback to pass a folio
2023-02-02 22:33:34 -08:00
pagewalk.c
mm/hugetlb: introduce hugetlb_walk()
2023-01-18 17:12:39 -08:00
percpu-internal.h
percpu: improve percpu_alloc_percpu event trace
2022-05-13 07:20:18 -07:00
percpu-km.c
…
percpu-stats.c
…
percpu-vm.c
…
percpu.c
mm/percpu.c: remove the lcm code since block size is fixed at page size
2022-11-07 22:59:18 -08:00
pgalloc-track.h
…
pgtable-generic.c
mm: avoid unnecessary flush on change_huge_pmd()
2022-05-13 07:20:05 -07:00
process_vm_access.c
use less confusing names for iov_iter direction initializers
2022-11-25 13:01:55 -05:00
ptdump.c
mm: pagewalk: Fix race between unmap and page walker
2022-09-03 10:13:13 -07:00
readahead.c
readahead: convert readahead_expand() to use a folio
2023-02-02 22:33:21 -08:00
rmap.c
mm/mmap: remove __vma_adjust()
2023-02-09 16:51:38 -08:00
rodata_test.c
mm/rodata_test: use PAGE_ALIGNED() helper
2022-10-03 14:03:05 -07:00
secretmem.c
mm: replace vma->vm_flags direct modifications with modifier calls
2023-02-09 16:51:39 -08:00
shmem.c
shmem: fix W=1 build warnings with CONFIG_SHMEM=n
2023-02-09 16:51:42 -08:00
shrinker_debug.c
mm: shrinkers: fix double kfree on shrinker name
2022-07-29 18:07:13 -07:00
shuffle.c
mm/shuffle: convert module_param_call to module_param_cb
2022-10-03 14:03:07 -07:00
shuffle.h
…
slab_common.c
mm/kasan: simplify and refine kasan_cache code
2023-01-18 17:12:55 -08:00
slab.c
mm: introduce folio_is_pfmemalloc
2023-01-18 17:12:57 -08:00
slab.h
mm/slab: add is_kmalloc_cache() helper function
2023-01-18 17:12:54 -08:00
slob.c
Merge branch 'slab/for-6.1/kmalloc_size_roundup' into slab/for-next
2022-09-29 11:30:55 +02:00
slub.c
mm: introduce folio_is_pfmemalloc
2023-01-18 17:12:57 -08:00
sparse-vmemmap.c
mm/sparse-vmemmap: generalise vmemmap_populate_hugepages()
2022-12-11 18:12:12 -08:00
sparse.c
mm/sparse: fix "unused function 'pgdat_to_phys'" warning
2023-02-02 22:33:29 -08:00
swap_cgroup.c
mm: memcontrol: don't allocate cgroup swap arrays when memcg is disabled
2022-10-03 14:03:36 -07:00
swap_slots.c
mm/swap: convert put_swap_page() to put_swap_folio()
2022-10-03 14:02:46 -07:00
swap_state.c
swap_state: update shadow_nodes for anonymous page
2023-02-02 22:33:24 -08:00
swap.c
mm: clean up mlock_page / munlock_page references in comments
2023-02-02 22:33:20 -08:00
swap.h
mm: remove the __swap_writepage return value
2023-02-02 22:33:33 -08:00
swapfile.c
mm/swapfile: remove pr_debug in get_swap_pages()
2023-02-09 16:51:41 -08:00
truncate.c
folio-compat: remove lru_cache_add()
2022-12-11 18:12:13 -08:00
usercopy.c
mm: use kstrtobool() instead of strtobool()
2022-11-30 15:58:45 -08:00
userfaultfd.c
mm/uffd: detect pgtable allocation failures
2023-01-18 17:12:53 -08:00
util.c
mm: new primitive kvmemdup()
2023-01-18 17:12:47 -08:00
vmalloc.c
mm/vmalloc: skip the uninitilized vmalloc areas
2023-02-09 16:51:43 -08:00
vmpressure.c
…
vmscan.c
mm: multi-gen LRU: simplify lru_gen_look_around()
2023-02-02 22:33:28 -08:00
vmstat.c
mm: vmscan: split khugepaged stats from direct reclaim stats
2022-11-30 15:58:41 -08:00
workingset.c
swap_state: update shadow_nodes for anonymous page
2023-02-02 22:33:24 -08:00
z3fold.c
mm: remove PageMovable export
2023-01-18 17:12:57 -08:00
zbud.c
zpool: clean out dead code
2022-12-11 18:12:10 -08:00
zpool.c
zpool: clean out dead code
2022-12-11 18:12:10 -08:00
zsmalloc.c
zsmalloc: make zspage chain size configurable
2023-02-02 22:33:23 -08:00
zswap.c
zswap: fix writeback lock ordering for zsmalloc
2022-12-11 18:12:09 -08:00