Star64_linux/mm
Joonsoo Kim d3cda2337b mm/page_alloc: don't reserve ZONE_HIGHMEM for ZONE_MOVABLE request
Freepage on ZONE_HIGHMEM doesn't work for kernel memory so it's not that
important to reserve.  When ZONE_MOVABLE is used, this problem would
theorectically cause to decrease usable memory for GFP_HIGHUSER_MOVABLE
allocation request which is mainly used for page cache and anon page
allocation.  So, fix it by setting 0 to
sysctl_lowmem_reserve_ratio[ZONE_HIGHMEM].

And, defining sysctl_lowmem_reserve_ratio array by MAX_NR_ZONES - 1 size
makes code complex.  For example, if there is highmem system, following
reserve ratio is activated for *NORMAL ZONE* which would be easyily
misleading people.

 #ifdef CONFIG_HIGHMEM
 32
 #endif

This patch also fixes this situation by defining
sysctl_lowmem_reserve_ratio array by MAX_NR_ZONES and place "#ifdef" to
right place.

Link: http://lkml.kernel.org/r/1504672525-17915-1-git-send-email-iamjoonsoo.kim@lge.com
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Tested-by: Tony Lindgren <tony@atomide.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: "Aneesh Kumar K . V" <aneesh.kumar@linux.vnet.ibm.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Laura Abbott <lauraa@codeaurora.org>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Michal Nazarewicz <mina86@mina86.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Will Deacon <will.deacon@arm.com>
Cc: <linux-api@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-04-11 10:28:32 -07:00
..
kasan slab, slub: skip unnecessary kasan_cache_shutdown() 2018-04-05 21:36:24 -07:00
backing-dev.c mm/vmscan: don't mess with pgdat->flags in memcg reclaim 2018-04-11 10:28:30 -07:00
balloon_compaction.c
bootmem.c mm: docs: fix parameter names mismatch 2018-02-06 18:32:48 -08:00
cleancache.c
cma.c headers: untangle kmemleak.h from mm.h 2018-04-05 21:36:27 -07:00
cma.h
cma_debug.c
compaction.c mm, migrate: remove reason argument from new_page_t 2018-04-11 10:28:32 -07:00
debug.c
debug_page_ref.c
dmapool.c
early_ioremap.c
fadvise.c mm: add ksys_fadvise64_64() helper; remove in-kernel call to sys_fadvise64_64() 2018-04-02 20:16:10 +02:00
failslab.c mm: make should_failslab always available for fault injection 2018-04-05 21:36:26 -07:00
filemap.c
frame_vector.c
frontswap.c
gup.c mm/gup.c: fix coding style issues. 2018-04-05 21:36:26 -07:00
gup_benchmark.c
highmem.c
hmm.c mm/hmm.c: remove superfluous RCU protection around radix tree lookup 2018-04-11 10:28:31 -07:00
huge_memory.c mm: unclutter THP migration 2018-04-11 10:28:32 -07:00
hugetlb.c mm, hugetlbfs: introduce ->pagesize() to vm_operations_struct 2018-04-05 21:36:26 -07:00
hugetlb_cgroup.c
hwpoison-inject.c
init-mm.c
internal.h mm, migrate: remove reason argument from new_page_t 2018-04-11 10:28:32 -07:00
interval_tree.c
Kconfig treewide: simplify Kconfig dependencies for removed archs 2018-03-26 15:55:57 +02:00
Kconfig.debug
khugepaged.c memcg, thp: do not invoke oom killer on thp charges 2018-04-11 10:28:31 -07:00
kmemleak-test.c
kmemleak.c mm: kernel-doc: add missing parameter descriptions 2018-04-05 21:36:27 -07:00
ksm.c mm/ksm.c: fix inconsistent accounting of zero pages 2018-04-11 10:28:31 -07:00
list_lru.c mm: make counting of list_lru_one::nr_items lockless 2018-04-05 21:36:27 -07:00
maccess.c mm: docs: fix parameter names mismatch 2018-02-06 18:32:48 -08:00
madvise.c
Makefile mm/swap_slots.c: use conditional compilation 2018-04-05 21:36:24 -07:00
memblock.c powerpc updates for 4.17 2018-04-07 12:08:19 -07:00
memcontrol.c memcg: fix per_node_info cleanup 2018-04-11 10:28:32 -07:00
memory-failure.c mm, migrate: remove reason argument from new_page_t 2018-04-11 10:28:32 -07:00
memory.c mm: swap: unify cluster-based and vma-based swap readahead 2018-04-05 21:36:25 -07:00
memory_hotplug.c mm: unclutter THP migration 2018-04-11 10:28:32 -07:00
mempolicy.c mm: unclutter THP migration 2018-04-11 10:28:32 -07:00
mempool.c kasan: detect invalid frees for large mempool objects 2018-02-06 18:32:43 -08:00
memtest.c
migrate.c mm: unclutter THP migration 2018-04-11 10:28:32 -07:00
mincore.c
mlock.c mm, mlock, vmscan: no more skipping pagevecs 2018-02-21 15:35:42 -08:00
mm_init.c
mmap.c mm: always print RLIMIT_DATA warning 2018-04-05 21:36:24 -07:00
mmu_context.c
mmu_notifier.c
mmzone.c
mprotect.c sched/numa: avoid trapping faults and attempting migration of file-backed dirty pages 2018-04-11 10:28:31 -07:00
mremap.c
msync.c
nobootmem.c
nommu.c mm/nommu: remove description of alloc_vm_area 2018-04-05 21:36:26 -07:00
oom_kill.c mm,oom_reaper: check for MMF_OOM_SKIP before complaining 2018-04-05 21:36:27 -07:00
page-writeback.c
page_alloc.c mm/page_alloc: don't reserve ZONE_HIGHMEM for ZONE_MOVABLE request 2018-04-11 10:28:32 -07:00
page_counter.c
page_ext.c
page_idle.c mm: thp: fix potential clearing to referenced flag in page_idle_clear_pte_refs_one() 2018-04-05 21:36:25 -07:00
page_io.c
page_isolation.c mm, migrate: remove reason argument from new_page_t 2018-04-11 10:28:32 -07:00
page_owner.c mm/page_owner.c: make early_page_owner_param() __init 2018-04-05 21:36:26 -07:00
page_poison.c mm/page_poison.c: make early_page_poison_param() __init 2018-04-05 21:36:26 -07:00
page_vma_mapped.c
pagewalk.c mm: kernel-doc: add missing parameter descriptions 2018-04-05 21:36:27 -07:00
percpu-internal.h
percpu-km.c percpu: allow select gfp to be passed to underlying allocators 2018-02-18 05:33:01 -08:00
percpu-stats.c mm: reuse DEFINE_SHOW_ATTRIBUTE() macro 2018-04-05 21:36:25 -07:00
percpu-vm.c percpu: allow select gfp to be passed to underlying allocators 2018-02-18 05:33:01 -08:00
percpu.c arch: remove obsolete architecture ports 2018-04-02 20:20:12 -07:00
pgtable-generic.c
process_vm_access.c mm: docs: add blank lines to silence sphinx "Unexpected indentation" errors 2018-02-06 18:32:48 -08:00
quicklist.c
readahead.c mm: add ksys_readahead() helper; remove in-kernel calls to sys_readahead() 2018-04-02 20:16:12 +02:00
rmap.c mm: kernel-doc: add missing parameter descriptions 2018-04-05 21:36:27 -07:00
rodata_test.c
shmem.c mm: swap: unify cluster-based and vma-based swap readahead 2018-04-05 21:36:25 -07:00
slab.c slab, slub: skip unnecessary kasan_cache_shutdown() 2018-04-05 21:36:24 -07:00
slab.h slab, slub: skip unnecessary kasan_cache_shutdown() 2018-04-05 21:36:24 -07:00
slab_common.c mm: make should_failslab always available for fault injection 2018-04-05 21:36:26 -07:00
slob.c
slub.c slab, slub: skip unnecessary kasan_cache_shutdown() 2018-04-05 21:36:24 -07:00
sparse-vmemmap.c
sparse.c mm/memory_hotplug: optimize memory hotplug 2018-04-05 21:36:25 -07:00
swap.c mm/swap.c: remove @cold parameter description for release_pages() 2018-04-05 21:36:26 -07:00
swap_cgroup.c
swap_slots.c mm/swap_slots.c: use conditional compilation 2018-04-05 21:36:24 -07:00
swap_state.c mm/swap_state.c: make bool enable_vma_readahead and swap_vma_readahead() static 2018-04-05 21:36:27 -07:00
swapfile.c mm/swapfile.c: make pointer swap_avail_heads static 2018-04-11 10:28:32 -07:00
truncate.c
usercopy.c
userfaultfd.c mm/userfaultfd.c: remove duplicate include 2018-02-06 18:32:47 -08:00
util.c mm: treat indirectly reclaimable memory as free in overcommit logic 2018-04-11 10:28:29 -07:00
vmacache.c
vmalloc.c vmalloc: fix __GFP_HIGHMEM usage for vmalloc_32 on 32b systems 2018-02-21 15:35:43 -08:00
vmpressure.c
vmscan.c mm: memcg: make sure memory.events is uptodate when waking pollers 2018-04-11 10:28:31 -07:00
vmstat.c mm: introduce NR_INDIRECTLY_RECLAIMABLE_BYTES 2018-04-11 10:28:29 -07:00
workingset.c
z3fold.c mm/z3fold.c: use gfpflags_allow_blocking 2018-04-11 10:28:31 -07:00
zbud.c mm: docs: fix parameter names mismatch 2018-02-06 18:32:48 -08:00
zpool.c mm/zpool.c: zpool_evictable: fix mismatch in parameter name and kernel-doc 2018-02-21 15:35:43 -08:00
zsmalloc.c mm: kernel-doc: add missing parameter descriptions 2018-04-05 21:36:27 -07:00
zswap.c mm, swap, frontswap: fix THP swap if frontswap enabled 2018-02-21 15:35:43 -08:00