linux-toradex.git/include/linux/vmstat.h, branch tegra-10.9.9

mm: count only reclaimable lru pages

2009-09-22T14:17:30+00:00

global_lru_pages() / zone_lru_pages() can be used in two ways:
- to estimate max reclaimable pages in determine_dirtyable_memory()
- to calculate the slab scan ratio

When swap is full or not present, the anon lru lists are not reclaimable
and also won't be scanned.  So the anon pages shall not be counted in both
usage scenarios.  Also rename to _reclaimable_pages: now they are counting
the possibly reclaimable lru pages.

It can greatly (and correctly) increase the slab scan rate under high
memory pressure (when most file pages have been reclaimed and swap is
full/absent), thus reduce false OOM kills.

Acked-by: Peter Zijlstra 
Reviewed-by: Rik van Riel 
Reviewed-by: Christoph Lameter 
Reviewed-by: Minchan Kim 
Cc: KOSAKI Motohiro 
Signed-off-by: Wu Fengguang 
Acked-by: Johannes Weiner 
Reviewed-by: Minchan Kim 
Reviewed-by: Jesse Barnes 
Cc: David Howells 
Cc: "Li, Ming Chun" 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

mm: remove __{add,sub}_zone_page_state()

2009-09-22T14:17:30+00:00

__add_zone_page_state() and __sub_zone_page_state() are unused.

Signed-off-by: KOSAKI Motohiro 
Cc: Wu Fengguang 
Cc: Rik van Riel 
Cc: Minchan Kim 
Cc: Christoph Lameter 
Cc: KAMEZAWA Hiroyuki 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

vmscan: count the number of times zone_reclaim() scans and fails

2009-06-17T02:47:46+00:00

On NUMA machines, the administrator can configure zone_reclaim_mode that
is a more targetted form of direct reclaim.  On machines with large NUMA
distances for example, a zone_reclaim_mode defaults to 1 meaning that
clean unmapped pages will be reclaimed if the zone watermarks are not
being met.

There is a heuristic that determines if the scan is worthwhile but it is
possible that the heuristic will fail and the CPU gets tied up scanning
uselessly.  Detecting the situation requires some guesswork and
experimentation so this patch adds a counter "zreclaim_failed" to
/proc/vmstat.  If during high CPU utilisation this counter is increasing
rapidly, then the resolution to the problem may be to set
/proc/sys/vm/zone_reclaim_mode to 0.

[akpm@linux-foundation.org: name things consistently]
Signed-off-by: Mel Gorman 
Reviewed-by: Rik van Riel 
Cc: Christoph Lameter 
Reviewed-by: KOSAKI Motohiro 
Cc: Wu Fengguang 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

mm: remove CONFIG_UNEVICTABLE_LRU config option

2009-06-17T02:47:42+00:00

Currently, nobody wants to turn UNEVICTABLE_LRU off.  Thus this
configurability is unnecessary.

Signed-off-by: KOSAKI Motohiro 
Cc: Johannes Weiner 
Cc: Andi Kleen 
Acked-by: Minchan Kim 
Cc: David Woodhouse 
Cc: Matt Mackall 
Cc: Rik van Riel 
Cc: Lee Schermerhorn 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

proc: move /proc/zoneinfo boilerplate to mm/vmstat.c

2008-10-23T13:35:04+00:00

Signed-off-by: Alexey Dobriyan 
Acked-by: Christoph Lameter

proc: move /proc/vmstat boilerplate to mm/vmstat.c

2008-10-23T13:12:51+00:00

Signed-off-by: Alexey Dobriyan 
Acked-by: Christoph Lameter

proc: move /proc/pagetypeinfo boilerplate to mm/vmstat.c

2008-10-23T12:33:29+00:00

Signed-off-by: Alexey Dobriyan

proc: move /proc/buddyinfo boilerplate to mm/vmstat.c

2008-10-23T12:12:04+00:00

Signed-off-by: Alexey Dobriyan

mlock: count attempts to free mlocked page

2008-10-20T15:52:31+00:00

Allow free of mlock()ed pages.  This shouldn't happen, but during
developement, it occasionally did.

This patch allows us to survive that condition, while keeping the
statistics and events correct for debug.

Signed-off-by: Lee Schermerhorn 
Signed-off-by: Rik van Riel 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

vmstat: mlocked pages statistics

2008-10-20T15:52:31+00:00

Add NR_MLOCK zone page state, which provides a (conservative) count of
mlocked pages (actually, the number of mlocked pages moved off the LRU).

Reworked by lts to fit in with the modified mlock page support in the
Reclaim Scalability series.

[kosaki.motohiro@jp.fujitsu.com: fix incorrect Mlocked field of /proc/meminfo]
[lee.schermerhorn@hp.com: mlocked-pages: add event counting with statistics]
Signed-off-by: Nick Piggin 
Signed-off-by: Lee Schermerhorn 
Signed-off-by: Rik van Riel 
Signed-off-by: KOSAKI Motohiro 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds