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android_kernel_motorola_sm6375/mm
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Repository files (latest commit first)
Filename Latest commit message Latest commit date
Lecopzer Chen 0821bcfb48 UPSTREAM: mm/cma.c: remove redundant cma_mutex lock 
The cma_mutex which protects alloc_contig_range() was first appeared in
commit 7ee793a62f ("cma: Remove potential deadlock situation"), at that
time, there is no guarantee the behavior of concurrency inside
alloc_contig_range().

After commit 2c7452a075 ("mm/page_isolation.c: make
start_isolate_page_range() fail if already isolated")

  > However, two subsystems (CMA and gigantic
  > huge pages for example) could attempt operations on the same range.  If
  > this happens, one thread may 'undo' the work another thread is doing.
  > This can result in pageblocks being incorrectly left marked as
  > MIGRATE_ISOLATE and therefore not available for page allocation.

The concurrency inside alloc_contig_range() was clarified.

Now we can find that hugepage and virtio call alloc_contig_range() without
any lock, thus cma_mutex is "redundant" in cma_alloc() now.

Link: https://lkml.kernel.org/r/20201020102241.3729-1-lecopzer.chen@mediatek.com
Signed-off-by: Lecopzer Chen <lecopzer.chen@mediatek.com>
Acked-by: David Hildenbrand <david@redhat.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Cc: YJ Chiang <yj.chiang@mediatek.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

(cherry picked from commit a4efc174b382fcdb62e2d90d39e78a274a975e38)
Signed-off-by: Lecopzer Chen <lecopzer.chen@mediatek.com>
Change-Id: I43755731ddb1a4ac9ac873a6e99c8c96d727ef77
2021-05-06 09:34:26 +00:00
..
kasan kasan: disable branch tracing for core runtime 2020-05-27 17:46:48 +02:00
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
cleancache.c
cma.c UPSTREAM: mm/cma.c: remove redundant cma_mutex lock 2021-05-06 09:34:26 +00:00
cma.h
cma_debug.c
compaction.c mm, compaction: make capture control handling safe wrt interrupts 2020-07-09 09:37:57 +02:00
debug.c mm/debug.c: always print flags in dump_page() 2020-03-05 16:43:51 +01:00
debug_page_ref.c
dmapool.c
early_ioremap.c
fadvise.c
failslab.c
filemap.c mm/error_inject: Fix allow_error_inject function signatures. 2020-10-29 09:57:37 +01:00
frame_vector.c mm: untag user pointers in get_vaddr_frames 2019-09-25 17:51:41 -07:00
frontswap.c
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
hmm.c pagewalk: separate function pointers from iterator data 2019-09-07 04:28:04 -03:00
huge_memory.c mm/userfaultfd: do not access vma->vm_mm after calling handle_userfault() 2020-11-24 13:29:24 +01:00
hugetlb.c mm/hugetlb: fix a race between hugetlb sysctl handlers 2020-09-09 19:12:37 +02:00
hugetlb_cgroup.c mm: hugetlb: switch to css_tryget() in hugetlb_cgroup_charge_cgroup() 2019-11-15 18:34:00 -08:00
hwpoison-inject.c
init-mm.c mm/init-mm.c: include <linux/mman.h> for vm_committed_as_batch 2019-10-19 06:32:32 -04:00
internal.h mm: drop mmap_sem before calling balance_dirty_pages() in write fault 2020-01-09 10:19:55 +01:00
interval_tree.c
Kconfig mm/zsmalloc.c: drop ZSMALLOC_PGTABLE_MAPPING 2020-12-16 10:56:59 +01:00
Kconfig.debug mm, page_owner, debug_pagealloc: save and dump freeing stack trace 2019-09-24 15:54:08 -07:00
khugepaged.c mm: khugepaged: recalculate min_free_kbytes after memory hotplug as expected by khugepaged 2020-10-14 10:33:05 +02:00
kmemleak-test.c
kmemleak.c mm/kmemleak.c: use address-of operator on section symbols 2020-10-01 13:17:53 +02:00
ksm.c mm/ksm: fix NULL pointer dereference when KSM zero page is enabled 2020-04-29 16:33:15 +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 This is the 5.4.69 stable release 2020-10-01 18:00:35 +02:00
Makefile mm: silence -Woverride-init/initializer-overrides 2019-09-24 15:54:10 -07:00
memblock.c ANDROID: mm/memblock: export memblock_end_of_DRAM 2020-12-14 06:29:58 +00:00
memcontrol.c mm: memcg/slab: fix root memcg vmstats 2020-11-24 13:29:24 +01:00
memfd.c mm: page cache: store only head pages in i_pages 2019-09-24 15:54:08 -07:00
memory-failure.c mm/memory-failure.c: don't access uninitialized memmaps in memory_failure() 2019-10-19 06:32:31 -04:00
memory.c This is the 5.4.69 stable release 2020-10-01 18:00:35 +02:00
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 This is the 5.4.76 stable release 2020-11-10 15:10:23 +01:00
mempool.c
memremap.c mm/memory_hotplug: shrink zones when offlining memory 2020-01-09 10:19:56 +01:00
memtest.c
migrate.c mm: move_pages: report the number of non-attempted pages 2020-02-11 04:35:13 -08:00
mincore.c mm: untag user pointers passed to memory syscalls 2019-09-25 17:51:41 -07:00
mlock.c Merge 5.4-rc1-prelrease into android-mainline 2019-10-02 17:58:47 +02:00
mm_init.c
mmap.c This is the 5.4.69 stable release 2020-10-01 18:00:35 +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 mm/mmu_notifiers: use the right return code for WARN_ON 2019-11-06 08:47:50 -08:00
mmzone.c
mprotect.c Revert "BACKPORT: FROMGIT: mm: improve mprotect(R|W) efficiency on pages referenced once" 2021-01-18 16:25:18 +00:00
mremap.c mm: Fix mremap not considering huge pmd devmap 2020-06-07 13:18:46 +02:00
msync.c mm: untag user pointers passed to memory syscalls 2019-09-25 17:51:41 -07:00
nommu.c x86/mm: split vmalloc_sync_all() 2020-03-25 08:25:58 +01:00
oom_kill.c mm, oom_adj: don't loop through tasks in __set_oom_adj when not necessary 2020-10-29 09:57:45 +01:00
OWNERS ANDROID: Add OWNERS files referring to the respective android-mainline OWNERS 2021-04-01 13:45:14 +00:00
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 This is the 5.4.86 stable release 2020-12-30 12:31:14 +01:00
page_counter.c Revert "ANDROID: Revert: Merge 5.4.60 into android11-5.4" 2020-08-23 13:12:51 +02:00
page_ext.c mm, page_owner: fix off-by-one error in __set_page_owner_handle() 2019-10-14 15:04:00 -07:00
page_idle.c
page_io.c UPSTREAM: mm/page_io.c: annotate refault stalls from swap_readpage 2020-01-24 17:54:59 +00:00
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 mm/page_poison.c: fix a typo in a comment 2019-09-24 15:54:08 -07:00
page_vma_mapped.c mm: introduce page_size() 2019-09-24 15:54:08 -07:00
pagewalk.c mm: pagewalk: fix termination condition in walk_pte_range() 2020-10-01 13:17:30 +02:00
percpu-internal.h
percpu-km.c
percpu-stats.c
percpu-vm.c
percpu.c percpu: fix first chunk size calculation for populated bitmap 2020-09-23 12:40:45 +02:00
pgtable-generic.c
process_vm_access.c
readahead.c
rmap.c mm: include <linux/huge_mm.h> for is_vma_temporary_stack 2019-10-19 06:32:32 -04:00
rodata_test.c
shmem.c This is the 5.4.42 stable release 2020-05-20 12:49:59 +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
slab.c mm, debug_pagealloc: don't rely on static keys too early 2020-01-23 08:22:40 +01:00
slab.h mm: slab: make page_cgroup_ino() to recognize non-compound slab pages properly 2019-11-06 08:47:50 -08:00
slab_common.c mm: memcg/slab: fix memory leak at non-root kmem_cache destroy 2020-07-29 10:18:44 +02:00
slob.c UPSTREAM: mm/sl[uo]b: export __kmalloc_track(_node)_caller 2020-11-02 16:12:00 +00:00
slub.c Merge tag 'android11-5.4.86_r00' from 'android11-5.4-lts' into 'android11-5.4' 2021-02-17 16:57:46 +01:00
sparse-vmemmap.c
sparse.c mm/sparse: fix kernel crash with pfn_section_valid check 2020-04-01 11:02:03 +02:00
swap.c mm: introduce MADV_COLD 2019-09-25 17:51:41 -07:00
swap_cgroup.c
swap_slots.c
swap_state.c mm/swap_state: fix a data race in swapin_nr_pages 2020-10-01 13:18:08 +02:00
swapfile.c This is the 5.4.83 stable release 2020-12-11 15:00:01 +01:00
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
util.c mm: add kvfree_sensitive() for freeing sensitive data objects 2020-06-17 16:40:23 +02:00
vmacache.c
vmalloc.c mm/vunmap: add cond_resched() in vunmap_pmd_range 2020-09-03 11:26:52 +02:00
vmpressure.c mm/vmpressure.c: fix a signedness bug in vmpressure_register_event() 2019-10-07 15:47:19 -07:00
vmscan.c mm/vmscan.c: fix data races using kswapd_classzone_idx 2020-10-01 13:17:53 +02:00
vmstat.c ANDROID: GKI: add fields required to enable CONFIG_TRANSPARENT_HUGEPAGE 2020-10-15 17:21:03 +02:00
workingset.c
z3fold.c mm/z3fold.c: claim page in the beginning of free 2019-10-07 15:47:19 -07:00
zbud.c
zpool.c zpool: add malloc_support_movable to zpool_driver 2019-09-24 15:54:12 -07:00
zsmalloc.c mm/zsmalloc.c: drop ZSMALLOC_PGTABLE_MAPPING 2020-12-16 10:56:59 +01:00
zswap.c zswap: do not map same object twice 2019-09-24 15:54:12 -07:00