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mm: vmscan: remove shrink_control arg from do_try_to_free_pages() 

There is no need passing on a shrink_control struct from
try_to_free_pages() and friends to do_try_to_free_pages() and then to
shrink_zones(), because it is only used in shrink_zones() and the only
field initialized on the top level is gfp_mask, which is always equal to
scan_control.gfp_mask.  So let's move shrink_control initialization to
shrink_zones().

Signed-off-by: Vladimir Davydov <vdavydov@parallels.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Dave Chinner <dchinner@redhat.com>
Cc: Glauber Costa <glommer@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Vladimir Davydov 2014-04-03 14:47:22 -07:00 коммит произвёл Linus Torvalds
Родитель 65ec02cb9a
Коммит 3115cd9145
1 изменённых файлов: 12 добавлений и 20 удалений
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32
mm/vmscan.c
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@ -2291,8 +2291,7 @@ static inline bool compaction_ready(struct zone *zone, struct scan_control *sc)
* the caller that it should consider retrying the allocation instead of
* further reclaim.
*/
static bool shrink_zones(struct zonelist *zonelist, struct scan_control *sc,
struct shrink_control *shrink)
static bool shrink_zones(struct zonelist *zonelist, struct scan_control *sc)
{
struct zoneref *z;
struct zone *zone;
@ -2301,6 +2300,9 @@ static bool shrink_zones(struct zonelist *zonelist, struct scan_control *sc,
unsigned long lru_pages = 0;
bool aborted_reclaim = false;
struct reclaim_state *reclaim_state = current->reclaim_state;
struct shrink_control shrink = {
.gfp_mask = sc->gfp_mask,
};
/*
* If the number of buffer_heads in the machine exceeds the maximum
@ -2310,7 +2312,7 @@ static bool shrink_zones(struct zonelist *zonelist, struct scan_control *sc,
if (buffer_heads_over_limit)
sc->gfp_mask |= __GFP_HIGHMEM;
nodes_clear(shrink->nodes_to_scan);
nodes_clear(shrink.nodes_to_scan);
for_each_zone_zonelist_nodemask(zone, z, zonelist,
gfp_zone(sc->gfp_mask), sc->nodemask) {
@ -2325,7 +2327,7 @@ static bool shrink_zones(struct zonelist *zonelist, struct scan_control *sc,
continue;
lru_pages += zone_reclaimable_pages(zone);
node_set(zone_to_nid(zone), shrink->nodes_to_scan);
node_set(zone_to_nid(zone), shrink.nodes_to_scan);
if (sc->priority != DEF_PRIORITY &&
!zone_reclaimable(zone))
@ -2370,7 +2372,7 @@ static bool shrink_zones(struct zonelist *zonelist, struct scan_control *sc,
* pages.
*/
if (global_reclaim(sc)) {
shrink_slab(shrink, sc->nr_scanned, lru_pages);
shrink_slab(&shrink, sc->nr_scanned, lru_pages);
if (reclaim_state) {
sc->nr_reclaimed += reclaim_state->reclaimed_slab;
reclaim_state->reclaimed_slab = 0;
@ -2417,8 +2419,7 @@ static bool all_unreclaimable(struct zonelist *zonelist,
* else, the number of pages reclaimed
*/
static unsigned long do_try_to_free_pages(struct zonelist *zonelist,
struct scan_control *sc,
struct shrink_control *shrink)
struct scan_control *sc)
{
unsigned long total_scanned = 0;
unsigned long writeback_threshold;
@ -2433,7 +2434,7 @@ static unsigned long do_try_to_free_pages(struct zonelist *zonelist,
vmpressure_prio(sc->gfp_mask, sc->target_mem_cgroup,
sc->priority);
sc->nr_scanned = 0;
aborted_reclaim = shrink_zones(zonelist, sc, shrink);
aborted_reclaim = shrink_zones(zonelist, sc);
total_scanned += sc->nr_scanned;
if (sc->nr_reclaimed >= sc->nr_to_reclaim)
@ -2596,9 +2597,6 @@ unsigned long try_to_free_pages(struct zonelist *zonelist, int order,
.target_mem_cgroup = NULL,
.nodemask = nodemask,
};
struct shrink_control shrink = {
.gfp_mask = sc.gfp_mask,
};
/*
* Do not enter reclaim if fatal signal was delivered while throttled.
@ -2612,7 +2610,7 @@ unsigned long try_to_free_pages(struct zonelist *zonelist, int order,
sc.may_writepage,
gfp_mask);
nr_reclaimed = do_try_to_free_pages(zonelist, &sc, &shrink);
nr_reclaimed = do_try_to_free_pages(zonelist, &sc);
trace_mm_vmscan_direct_reclaim_end(nr_reclaimed);
@ -2679,9 +2677,6 @@ unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *memcg,
.gfp_mask = (gfp_mask & GFP_RECLAIM_MASK) |
(GFP_HIGHUSER_MOVABLE & ~GFP_RECLAIM_MASK),
};
struct shrink_control shrink = {
.gfp_mask = sc.gfp_mask,
};
/*
* Unlike direct reclaim via alloc_pages(), memcg's reclaim doesn't
@ -2696,7 +2691,7 @@ unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *memcg,
sc.may_writepage,
sc.gfp_mask);
nr_reclaimed = do_try_to_free_pages(zonelist, &sc, &shrink);
nr_reclaimed = do_try_to_free_pages(zonelist, &sc);
trace_mm_vmscan_memcg_reclaim_end(nr_reclaimed);
@ -3331,9 +3326,6 @@ unsigned long shrink_all_memory(unsigned long nr_to_reclaim)
.order = 0,
.priority = DEF_PRIORITY,
};
struct shrink_control shrink = {
.gfp_mask = sc.gfp_mask,
};
struct zonelist *zonelist = node_zonelist(numa_node_id(), sc.gfp_mask);
struct task_struct *p = current;
unsigned long nr_reclaimed;
@ -3343,7 +3335,7 @@ unsigned long shrink_all_memory(unsigned long nr_to_reclaim)
reclaim_state.reclaimed_slab = 0;
p->reclaim_state = &reclaim_state;
nr_reclaimed = do_try_to_free_pages(zonelist, &sc, &shrink);
nr_reclaimed = do_try_to_free_pages(zonelist, &sc);
p->reclaim_state = NULL;
lockdep_clear_current_reclaim_state();