alex/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
9705bea5f8
linux/mm
History
Arun KS 9705bea5f8 mm: convert zone->managed_pages to atomic variable 
totalram_pages, zone->managed_pages and totalhigh_pages updates are
protected by managed_page_count_lock, but readers never care about it.
Convert these variables to atomic to avoid readers potentially seeing a
store tear.

This patch converts zone->managed_pages.  Subsequent patches will convert
totalram_panges, totalhigh_pages and eventually managed_page_count_lock
will be removed.

Main motivation was that managed_page_count_lock handling was complicating
things.  It was discussed in length here,
https://lore.kernel.org/patchwork/patch/995739/#1181785 So it seemes
better to remove the lock and convert variables to atomic, with preventing
poteintial store-to-read tearing as a bonus.

Link: http://lkml.kernel.org/r/1542090790-21750-3-git-send-email-arunks@codeaurora.org
Signed-off-by: Arun KS <arunks@codeaurora.org>
Suggested-by: Michal Hocko <mhocko@suse.com>
Suggested-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Reviewed-by: David Hildenbrand <david@redhat.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Pavel Tatashin <pasha.tatashin@soleen.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-12-28 12:11:47 -08:00
..
kasan kasan: add SPDX-License-Identifier mark to source files 2018-12-28 12:11:44 -08:00
backing-dev.c
balloon_compaction.c
cleancache.c
cma_debug.c
cma.c kasan, mm, arm64: tag non slab memory allocated via pagealloc 2018-12-28 12:11:44 -08:00
cma.h
compaction.c psi: pressure stall information for CPU, memory, and IO 2018-10-26 16:26:32 -07:00
debug_page_ref.c
debug.c mm: lower the printk loglevel for __dump_page messages 2018-12-28 12:11:46 -08:00
dmapool.c
early_ioremap.c
fadvise.c
failslab.c
filemap.c vfs: rework data cloning infrastructure 2018-11-02 09:33:08 -07:00
frame_vector.c
frontswap.c
gup_benchmark.c mm/gup_benchmark.c: prevent integer overflow in ioctl 2018-10-31 08:54:12 -07:00
gup.c mm/gup: finish consolidating error handling 2018-11-30 14:56:13 -08:00
highmem.c
hmm.c mm/hmm: invalidate device page table at start of invalidation 2018-10-31 08:54:12 -07:00
huge_memory.c mm: thp: fix flags for pmd migration when split 2018-12-21 14:51:18 -08:00
hugetlb_cgroup.c
hugetlb.c hugetlbfs: call VM_BUG_ON_PAGE earlier in free_huge_page() 2018-12-14 15:05:45 -08:00
hwpoison-inject.c
init-mm.c
internal.h memblock: rename __free_pages_bootmem to memblock_free_pages 2018-10-31 08:54:16 -07:00
interval_tree.c
Kconfig ksm: replace jhash2 with xxhash 2018-12-28 12:11:46 -08:00
Kconfig.debug
khugepaged.c Merge branch 'for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu 2018-12-04 07:52:30 +01:00
kmemleak-test.c
kmemleak.c mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
ksm.c ksm: replace jhash2 with xxhash 2018-12-28 12:11:46 -08:00
list_lru.c
maccess.c
madvise.c Merge branch 'xarray' of git://git.infradead.org/users/willy/linux-dax 2018-10-28 11:35:40 -07:00
Makefile mm: remove nobootmem 2018-10-31 08:54:16 -07:00
memblock.c mm: convert zone->managed_pages to atomic variable 2018-12-28 12:11:47 -08:00
memcontrol.c mm: handle no memcg case in memcg_kmem_charge() properly 2018-11-03 10:09:37 -07:00
memfd.c memfd: Convert memfd_tag_pins to XArray 2018-10-21 10:46:41 -04:00
memory_hotplug.c mm, memory_hotplug: do not clear numa_node association after hot_remove 2018-12-28 12:11:47 -08:00
memory-failure.c dax: Fix unlock mismatch with updated API 2018-12-04 21:32:00 -08:00
memory.c mm: Fix warning in insert_pfn() 2018-10-31 08:54:17 -07:00
mempolicy.c Revert "mm, thp: consolidate THP gfp handling into alloc_hugepage_direct_gfpmask" 2018-12-08 10:26:20 -08:00
mempool.c
memtest.c
migrate.c Merge branch 'xarray' of git://git.infradead.org/users/willy/linux-dax 2018-10-28 11:35:40 -07:00
mincore.c xarray: Replace exceptional entries 2018-09-29 22:47:49 -04:00
mlock.c
mm_init.c
mmap.c mm/mmap.c: remove verify_mm_writelocked() 2018-12-28 12:11:47 -08:00
mmu_context.c
mmu_gather.c mm: Replace call_rcu_sched() with call_rcu() 2018-11-27 09:21:46 -08:00
mmu_notifier.c mm/mmu_notifier.c: remove mmu_notifier_synchronize() 2018-12-28 12:11:46 -08:00
mmzone.c
mprotect.c
mremap.c mm: mremap: downgrade mmap_sem to read when shrinking 2018-10-26 16:26:35 -07:00
msync.c
nommu.c mm/gup: cache dev_pagemap while pinning pages 2018-10-26 16:38:15 -07:00
oom_kill.c Merge branch 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2018-10-24 11:22:39 +01:00
page_alloc.c mm: convert zone->managed_pages to atomic variable 2018-12-28 12:11:47 -08:00
page_counter.c
page_ext.c mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
page_idle.c mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
page_io.c for-linus-20181102 2018-11-02 11:25:48 -07:00
page_isolation.c mm: only report isolation failures when offlining memory 2018-12-28 12:11:46 -08:00
page_owner.c mm/page_owner: clamp read count to PAGE_SIZE 2018-12-28 12:11:46 -08:00
page_poison.c virtio, vhost: fixes, tweaks 2018-11-01 14:42:49 -07:00
page_vma_mapped.c mm/rmap: map_pte() was not handling private ZONE_DEVICE page properly 2018-10-31 08:54:11 -07:00
page-writeback.c Merge branch 'xarray' of git://git.infradead.org/users/willy/linux-dax 2018-10-28 11:35:40 -07:00
pagewalk.c
percpu-internal.h
percpu-km.c
percpu-stats.c
percpu-vm.c
percpu.c Merge branch 'for-4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu 2018-11-01 09:27:57 -07:00
pgtable-generic.c x86/mm: Page size aware flush_tlb_mm_range() 2018-10-09 16:51:11 +02:00
process_vm_access.c
quicklist.c
readahead.c mm/readahead.c: simplify get_next_ra_size() 2018-12-28 12:11:46 -08:00
rmap.c mm/huge_memory: rename freeze_page() to unmap_page() 2018-11-30 14:56:14 -08:00
rodata_test.c
shmem.c mm: reference totalram_pages and managed_pages once per function 2018-12-28 12:11:47 -08:00
slab_common.c mm, slab: remove unnecessary unlikely() 2018-12-28 12:11:46 -08:00
slab.c kasan, mm, arm64: tag non slab memory allocated via pagealloc 2018-12-28 12:11:44 -08:00
slab.h kasan, mm: change hooks signatures 2018-12-28 12:11:43 -08:00
slob.c
slub.c mm/slub.c: record final state of slub action in deactivate_slab() 2018-12-28 12:11:46 -08:00
sparse-vmemmap.c mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
sparse.c mm/hotplug: optimize clear_hwpoisoned_pages() 2018-12-28 12:11:46 -08:00
swap_cgroup.c
swap_slots.c
swap_state.c Merge branch 'xarray' of git://git.infradead.org/users/willy/linux-dax 2018-10-28 11:35:40 -07:00
swap.c mm: Replace spin_is_locked() with lockdep 2018-11-12 09:06:22 -08:00
swapfile.c mm/swapfile.c: use kvzalloc for swap_info_struct allocation 2018-11-18 10:15:09 -08:00
truncate.c mm: cleancache: fix corruption on missed inode invalidation 2018-11-30 14:56:14 -08:00
usercopy.c
userfaultfd.c userfaultfd: shmem: add i_size checks 2018-11-30 14:56:14 -08:00
util.c kvfree(): fix misleading comment 2018-10-26 16:26:33 -07:00
vmacache.c
vmalloc.c vfree: add debug might_sleep() 2018-10-26 16:26:33 -07:00
vmpressure.c
vmscan.c Merge drm/drm-next into drm-intel-next-queued 2018-11-20 13:14:08 +02:00
vmstat.c mm: convert zone->managed_pages to atomic variable 2018-12-28 12:11:47 -08:00
workingset.c Merge branch 'xarray' of git://git.infradead.org/users/willy/linux-dax 2018-10-28 11:35:40 -07:00
z3fold.c z3fold: fix possible reclaim races 2018-11-18 10:15:09 -08:00
zbud.c
zpool.c
zsmalloc.c mm/zsmalloc.c: fix fall-through annotation 2018-10-26 16:26:35 -07:00
zswap.c