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Johannes Weiner 9a2651140e mm: vmscan: clean up get_scan_count() 
Reclaim pressure balance between anon and file pages is calculated
through a tuple of numerators and a shared denominator.

Exceptional cases that want to force-scan anon or file pages configure
the numerators and denominator such that one list is preferred, which is
not necessarily the most obvious way:

    fraction[0] = 1;
    fraction[1] = 0;
    denominator = 1;
    goto out;

Make this easier by making the force-scan cases explicit and use the
fractionals only in case they are calculated from reclaim history.

[akpm@linux-foundation.org: avoid using unintialized_var()]
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Rik van Riel <riel@redhat.com>
Acked-by: Mel Gorman <mgorman@suse.de>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
Cc: Hugh Dickins <hughd@google.com>
Cc: Satoru Moriya <satoru.moriya@hds.com>
Cc: Simon Jeons <simon.jeons@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-23 17:50:09 -08:00
..
backing-dev.c
bdi: allow block devices to say that they require stable page writes
2013-02-21 17:22:19 -08:00
balloon_compaction.c
mm: introduce a common interface for balloon pages mobility
2012-12-11 17:22:26 -08:00
bootmem.c
mm: Add alloc_bootmem_low_pages_nopanic()
2013-01-29 19:32:59 -08:00
bounce.c
block: optionally snapshot page contents to provide stable pages during write
2013-02-21 17:22:20 -08:00
cleancache.c
->encode_fh() API change
2012-05-29 23:28:33 -04:00
compaction.c
mm: compaction: partially revert capture of suitable high-order page
2013-01-11 14:54:56 -08:00
debug-pagealloc.c
mm, x86: Remove debug_pagealloc_enabled
2011-12-06 09:24:07 +01:00
dmapool.c
dmapool: make DMAPOOL_DEBUG detect corruption of free marker
2012-12-11 17:22:24 -08:00
fadvise.c
switch simple cases of fget_light to fdget
2012-09-26 22:20:08 -04:00
failslab.c
switch debugfs to umode_t
2012-01-03 22:54:56 -05:00
filemap_xip.c
mm: move all mmu notifier invocations to be done outside the PT lock
2012-10-09 16:22:58 +09:00
filemap.c
mm: only enforce stable page writes if the backing device requires it
2013-02-21 17:22:19 -08:00
fremap.c
remap_file_pages: correctly handle the case of a NULL vm_ops pointer
2012-10-19 13:37:57 -07:00
frontswap.c
frontswap: support exclusive gets if tmem backend is capable
2012-09-21 10:38:12 -04:00
highmem.c
Some nice cleanups, and even a patch my wife did as a "live" demo for
2012-12-20 08:37:05 -08:00
huge_memory.c
thp: avoid dumping huge zero page
2013-02-05 20:38:46 +11:00
hugetlb_cgroup.c
mm/hugetlb: create hugetlb cgroup file in hugetlb_init
2012-12-18 15:02:15 -08:00
hugetlb.c
mm/hugetlb.c: convert to pr_foo()
2013-02-23 17:50:09 -08:00
hwpoison-inject.c
memcg: rename config variables
2012-07-31 18:42:43 -07:00
init-mm.c
atomic: use <linux/atomic.h>
2011-07-26 16:49:47 -07:00
internal.h
mm: compaction: partially revert capture of suitable high-order page
2013-01-11 14:54:56 -08:00
interval_tree.c
mm: add CONFIG_DEBUG_VM_RB build option
2012-10-09 16:22:42 +09:00
Kconfig
Merge branch 'akpm' (incoming from Andrew)
2013-02-21 17:38:49 -08:00
Kconfig.debug
mm: more intensive memory corruption debugging
2012-01-10 16:30:42 -08:00
kmemcheck.c
…
kmemleak-test.c
kmemleak: remove memset by using kzalloc
2011-01-27 18:31:51 +00:00
kmemleak.c
mm/kmemleak.c: remove obsolete simple_strtoul
2012-12-18 15:02:15 -08:00
ksm.c
ksm: make rmap walks more scalable
2012-12-20 07:06:56 -08:00
maccess.c
mm: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
madvise.c
mm: prepare VM_DONTDUMP for using in drivers
2012-10-09 16:22:18 +09:00
Makefile
mm: introduce a common interface for balloon pages mobility
2012-12-11 17:22:26 -08:00
memblock.c
memblock: Add memblock_mem_size()
2013-01-29 19:32:57 -08:00
memcontrol.c
mm/memcontrol.c: convert printk(KERN_FOO) to pr_foo()
2013-02-23 17:50:09 -08:00
memory_hotplug.c
mm/memory_hotplug.c: improve comments
2012-12-18 15:02:15 -08:00
memory-failure.c
Automatic NUMA Balancing V11
2012-12-16 15:18:08 -08:00
memory.c
mm: reinstante dropped pmd_trans_splitting() check
2013-01-09 08:36:54 -08:00
mempolicy.c
mm: mempolicy: Convert shared_policy mutex to spinlock
2013-01-02 17:32:13 -08:00
mempool.c
mempool: add @gfp_mask to mempool_create_node()
2012-06-25 11:53:47 +02:00
migrate.c
mm/hugetlb: set PTE as huge in hugetlb_change_protection and remove_migration_pte
2013-02-05 20:38:47 +11:00
mincore.c
mm: thp: fix pmd_bad() triggering in code paths holding mmap_sem read mode
2012-03-21 17:54:54 -07:00
mlock.c
mm: don't overwrite mm->def_flags in do_mlockall()
2013-02-12 14:34:00 -08:00
mm_init.c
mm: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
mmap.c
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2013-02-19 18:19:48 -08:00
mmu_context.c
mm, counters: remove task argument to sync_mm_rss() and __sync_task_rss_stat()
2012-03-21 17:54:59 -07:00
mmu_notifier.c
mm/mmu_notifier: allocate mmu_notifier in advance
2012-10-25 14:37:53 -07:00
mmzone.c
memcg: fix hotplugged memory zone oops
2012-11-16 14:33:04 -08:00
mprotect.c
mm/mprotect.c: coding-style cleanups
2012-12-18 15:02:15 -08:00
mremap.c
sched: Move sched.h sysctl bits into separate header
2013-02-07 20:50:54 +01:00
msync.c
…
nobootmem.c
mm: Add alloc_bootmem_low_pages_nopanic()
2013-01-29 19:32:59 -08:00
nommu.c
sched: Move sched.h sysctl bits into separate header
2013-02-07 20:50:54 +01:00
oom_kill.c
memcg, oom: provide more precise dump info while memcg oom happening
2013-02-23 17:50:08 -08:00
page_alloc.c
CMA: make putback_lru_pages() call conditional
2013-02-23 17:50:09 -08:00
page_cgroup.c
memcontrol: use N_MEMORY instead N_HIGH_MEMORY
2012-12-12 17:38:32 -08:00
page_io.c
mm: add support for direct_IO to highmem pages
2012-07-31 18:42:47 -07:00
page_isolation.c
mm: fix zone_watermark_ok_safe() accounting of isolated pages
2013-01-04 16:11:46 -08:00
page-writeback.c
block: optionally snapshot page contents to provide stable pages during write
2013-02-21 17:22:20 -08:00
pagewalk.c
thp: change split_huge_page_pmd() interface
2012-12-12 17:38:31 -08:00
percpu-km.c
…
percpu-vm.c
mm: fix kernel-doc warnings
2012-06-20 14:39:36 -07:00
percpu.c
mm, percpu: Make sure percpu_alloc early parameter has an argument
2012-12-02 06:23:04 -08:00
pgtable-generic.c
mm: Only flush the TLB when clearing an accessible pte
2012-12-11 14:28:34 +00:00
process_vm_access.c
aio/vfs: cleanup of rw_copy_check_uvector() and compat_rw_copy_check_uvector()
2012-05-31 17:49:32 -07:00
quicklist.c
mm: delete various needless include <linux/module.h>
2011-10-31 09:20:11 -04:00
readahead.c
switch simple cases of fget_light to fdget
2012-09-26 22:20:08 -04:00
rmap.c
s390/mm: implement software dirty bits
2013-02-14 15:55:23 +01:00
shmem.c
mempolicy: remove arg from mpol_parse_str, mpol_to_str
2013-01-02 09:27:10 -08:00
slab_common.c
slab: propagate tunable values
2012-12-18 15:02:14 -08:00
slab.c
memcg: add comments clarifying aspects of cache attribute propagation
2012-12-18 15:02:15 -08:00
slab.h
slab: propagate tunable values
2012-12-18 15:02:14 -08:00
slob.c
sl[au]b: always get the cache from its page in kmem_cache_free()
2012-12-18 15:02:14 -08:00
slub.c
slub: drop mutex before deleting sysfs entry
2012-12-18 15:02:15 -08:00
sparse-vmemmap.c
mm: delete various needless include <linux/module.h>
2011-10-31 09:20:11 -04:00
sparse.c
memory-hotplug, mm/sparse.c: clear the memory to store struct page
2012-12-11 17:22:23 -08:00
swap_state.c
mm: add support for a filesystem to activate swap files and use direct_IO for writing swap pages
2012-07-31 18:42:47 -07:00
swap.c
mm: remove vma arg from page_evictable
2012-10-09 16:22:55 +09:00
swapfile.c
mm, oom: fix race when specifying a thread as the oom origin
2012-12-11 17:22:27 -08:00
truncate.c
mm: drop vmtruncate
2012-12-20 18:46:29 -05:00
util.c
Merge branch 'master' into for-next
2012-10-28 19:29:19 +01:00
vmalloc.c
mm: use IS_ENABLED(CONFIG_NUMA) instead of NUMA_BUILD
2012-12-11 17:22:22 -08:00
vmscan.c
mm: vmscan: clean up get_scan_count()
2013-02-23 17:50:09 -08:00
vmstat.c
Automatic NUMA Balancing V11
2012-12-16 15:18:08 -08:00