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Chao Yu f203c3b33f zbud: avoid accessing last unused freelist 
For now, there are NCHUNKS of 64 freelists in zbud_pool, the last
unbuddied[63] freelist linked with all zbud pages which have free chunks
of 63.  Calculating according to context of num_free_chunks(), our max
chunk number of unbuddied zbud page is 62, so none of zbud pages will be
added/removed in last freelist, but still we will try to find an unbuddied
zbud page in the last unused freelist, it is unneeded.

This patch redefines NCHUNKS to 63 as free chunk number in one zbud page,
hence we can decrease size of zpool and avoid accessing the last unused
freelist whenever failing to allocate zbud from freelist in zbud_alloc.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Cc: Seth Jennings <sjennings@variantweb.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-10-09 22:26:03 -04:00
..
backing-dev.c
mm: clean up zone flags
2014-10-09 22:25:57 -04:00
balloon_compaction.c
mm/balloon_compaction: add vmstat counters and kpageflags bit
2014-10-09 22:26:01 -04:00
bootmem.c
mm/bootmem.c: use include/linux/ headers
2014-10-09 22:26:00 -04:00
cleancache.c
mm: dump page when hitting a VM_BUG_ON using VM_BUG_ON_PAGE
2014-01-23 16:36:50 -08:00
cma.c
mm: cma: adjust address limit to avoid hitting low/high memory boundary
2014-10-09 22:25:53 -04:00
compaction.c
mm/balloon_compaction: redesign ballooned pages management
2014-10-09 22:26:01 -04:00
debug-pagealloc.c
…
debug.c
mm/debug.c: use pr_emerg()
2014-10-09 22:25:59 -04:00
dmapool.c
mm/dmapool.c: fixed a brace coding style issue
2014-10-09 22:26:00 -04:00
early_ioremap.c
mm: create generic early_ioremap() support
2014-04-07 16:36:15 -07:00
fadvise.c
teach SYSCALL_DEFINE<n> how to deal with long long/unsigned long long
2013-03-03 22:46:22 -05:00
failslab.c
…
filemap_xip.c
seqcount: Add lockdep functionality to seqcount/seqlock structures
2013-11-06 12:40:26 +01:00
filemap.c
mm/filemap.c: remove trailing whitespace
2014-10-09 22:26:00 -04:00
fremap.c
mm: mark remap_file_pages() syscall as deprecated
2014-06-06 16:08:17 -07:00
frontswap.c
swap: change swap_list_head to plist, add swap_avail_head
2014-06-04 16:54:07 -07:00
gup.c
mm: introduce a general RCU get_user_pages_fast()
2014-10-09 22:26:00 -04:00
highmem.c
mm/highmem: make kmap cache coloring aware
2014-08-06 18:01:22 -07:00
huge_memory.c
mm: use VM_BUG_ON_MM where possible
2014-10-09 22:25:58 -04:00
hugetlb_cgroup.c
hugetlb_cgroup: use lockdep_assert_held rather than spin_is_locked
2014-08-29 16:28:16 -07:00
hugetlb.c
mm: convert a few VM_BUG_ON callers to VM_BUG_ON_VMA
2014-10-09 22:25:57 -04:00
hwpoison-inject.c
mm/hwpoison-inject.c: remove unnecessary null test before debugfs_remove_recursive
2014-08-06 18:01:19 -07:00
init-mm.c
…
internal.h
mm, compaction: pass gfp mask to compact_control
2014-10-09 22:25:55 -04:00
interval_tree.c
mm: convert a few VM_BUG_ON callers to VM_BUG_ON_VMA
2014-10-09 22:25:57 -04:00
iov_iter.c
fuse: honour max_read and max_write in direct_io mode
2014-09-26 21:16:51 -04:00
Kconfig
mm/balloon_compaction: add vmstat counters and kpageflags bit
2014-10-09 22:26:01 -04:00
Kconfig.debug
…
kmemcheck.c
mm/slab_common: move kmem_cache definition to internal header
2014-10-09 22:25:50 -04:00
kmemleak-test.c
mm/kmemleak-test.c: use pr_fmt for logging
2014-06-06 16:08:18 -07:00
kmemleak.c
mm: introduce kmemleak_update_trace()
2014-06-06 16:08:17 -07:00
ksm.c
mm: ksm use pr_err instead of printk
2014-10-09 22:26:00 -04:00
list_lru.c
mm: keep page cache radix tree nodes in check
2014-04-03 16:21:01 -07:00
maccess.c
…
madvise.c
mm: update the description for madvise_remove
2014-08-06 18:01:18 -07:00
Makefile
mm/balloon_compaction: add vmstat counters and kpageflags bit
2014-10-09 22:26:01 -04:00
memblock.c
mem-hotplug: let memblock skip the hotpluggable memory regions in __next_mem_range()
2014-09-10 15:42:12 -07:00
memcontrol.c
memcg: zap memcg_can_account_kmem
2014-10-09 22:26:00 -04:00
memory_hotplug.c
memory-hotplug: add sysfs valid_zones attribute
2014-10-09 22:25:52 -04:00
memory-failure.c
hwpoison: fix race with changing page during offlining
2014-08-06 18:01:19 -07:00
memory.c
mm: softdirty: keep bit when zapping file pte
2014-09-26 08:10:35 -07:00
mempolicy.c
mm: mempolicy: skip inaccessible VMAs when setting MPOL_MF_LAZY
2014-10-09 22:26:02 -04:00
mempool.c
mm/mempool.c: update the kmemleak stack trace for mempool allocations
2014-06-06 16:08:17 -07:00
migrate.c
mm/balloon_compaction: redesign ballooned pages management
2014-10-09 22:26:01 -04:00
mincore.c
mm + fs: prepare for non-page entries in page cache radix trees
2014-04-03 16:21:00 -07:00
mlock.c
mm: use VM_BUG_ON_MM where possible
2014-10-09 22:25:58 -04:00
mm_init.c
mm: bring back /sys/kernel/mm
2014-01-27 21:02:39 -08:00
mmap.c
mm: use VM_BUG_ON_MM where possible
2014-10-09 22:25:58 -04:00
mmu_context.c
sched/mm: call finish_arch_post_lock_switch in idle_task_exit and use_mm
2014-02-21 08:50:17 +01:00
mmu_notifier.c
kvm: Fix page ageing bugs
2014-09-24 14:07:58 +02:00
mmzone.c
mm: numa: Change page last {nid,pid} into {cpu,pid}
2013-10-09 14:47:45 +02:00
mprotect.c
mm: move mmu notifier call from change_protection to change_pmd_range
2014-04-07 16:35:50 -07:00
mremap.c
mm/mremap.c: use linux headers
2014-10-09 22:26:00 -04:00
msync.c
msync: fix incorrect fstart calculation
2014-07-03 09:21:53 -07:00
nobootmem.c
mem-hotplug: let memblock skip the hotpluggable memory regions in __next_mem_range()
2014-09-10 15:42:12 -07:00
nommu.c
arm64,ia64,ppc,s390,sh,tile,um,x86,mm: remove default gate area
2014-08-08 15:57:27 -07:00
oom_kill.c
mm: clean up zone flags
2014-10-09 22:25:57 -04:00
page_alloc.c
mm: move debug code out of page_alloc.c
2014-10-09 22:25:58 -04:00
page_cgroup.c
mm/page_cgroup.c: mark functions as static
2014-04-03 16:21:02 -07:00
page_io.c
fix __swap_writepage() compile failure on old gcc versions
2014-06-14 19:30:48 -05:00
page_isolation.c
mm: memory-hotplug: enable memory hotplug to handle hugepage
2013-09-11 15:57:48 -07:00
page-writeback.c
mm/page-writeback.c: use min3/max3 macros to avoid shadow warnings
2014-10-09 22:25:57 -04:00
pagewalk.c
mm: use VM_BUG_ON_MM where possible
2014-10-09 22:25:58 -04:00
percpu-km.c
…
percpu-vm.c
percpu: perform tlb flush after pcpu_map_pages() failure
2014-08-15 16:06:10 -04:00
percpu.c
percpu: free percpu allocation info for uniprocessor system
2014-08-16 08:59:02 -04:00
pgtable-generic.c
mm: actually clear pmd_numa before invalidating
2014-08-29 16:28:15 -07:00
process_vm_access.c
start adding the tag to iov_iter
2014-05-06 17:32:49 -04:00
quicklist.c
…
readahead.c
mm/readahead.c: remove unused file_ra_state from count_history_pages
2014-08-06 18:01:15 -07:00
rmap.c
mm: convert a few VM_BUG_ON callers to VM_BUG_ON_VMA
2014-10-09 22:25:57 -04:00
shmem.c
include/linux/migrate.h: remove migrate_page #define
2014-10-09 22:25:56 -04:00
slab_common.c
memcg: move memcg_update_cache_size() to slab_common.c
2014-10-09 22:25:59 -04:00
slab.c
mm/slab.c: use __seq_open_private() instead of seq_open()
2014-10-09 22:25:57 -04:00
slab.h
mm/slab: use percpu allocator for cpu cache
2014-10-09 22:25:51 -04:00
slob.c
mm/sl[ao]b: always track caller in kmalloc_(node_)track_caller()
2014-10-09 22:25:50 -04:00
slub.c
mm/slab_common: commonize slab merge logic
2014-10-09 22:25:51 -04:00
sparse-vmemmap.c
mm/sparse: use memblock apis for early memory allocations
2014-01-21 16:19:47 -08:00
sparse.c
mm: use macros from compiler.h instead of __attribute__((...))
2014-04-07 16:35:54 -07:00
swap_state.c
mm: memcontrol: do not kill uncharge batching in free_pages_and_swap_cache
2014-10-09 22:25:59 -04:00
swap.c
mm: memcontrol: do not kill uncharge batching in free_pages_and_swap_cache
2014-10-09 22:25:59 -04:00
swapfile.c
mm: memcontrol: rewrite uncharge API
2014-08-08 15:57:17 -07:00
truncate.c
mm: memcontrol: rewrite uncharge API
2014-08-08 15:57:17 -07:00
util.c
proc/maps: make vm_is_stack() logic namespace-friendly
2014-10-09 22:25:50 -04:00
vmacache.c
mm,vmacache: optimize overflow system-wide flushing
2014-06-04 16:53:57 -07:00
vmalloc.c
mm/vmalloc.c: use seq_open_private() instead of seq_open()
2014-10-09 22:25:56 -04:00
vmpressure.c
arm, pm, vmpressure: add missing slab.h includes
2014-02-03 13:24:01 -05:00
vmscan.c
mm: memcontrol: fix transparent huge page allocations under pressure
2014-10-09 22:25:59 -04:00
vmstat.c
vmstat: on-demand vmstat workers V8
2014-10-09 22:26:02 -04:00
workingset.c
mm: keep page cache radix tree nodes in check
2014-04-03 16:21:01 -07:00
zbud.c
zbud: avoid accessing last unused freelist
2014-10-09 22:26:03 -04:00
zpool.c
mm/zpool: use prefixed module loading
2014-08-29 16:28:16 -07:00
zsmalloc.c
zsmalloc: simplify init_zspage free obj linking
2014-10-09 22:26:03 -04:00
zswap.c
mm/zswap.c: add __init to zswap_entry_cache_destroy()
2014-08-08 15:57:18 -07:00