lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Merge branch 'master' into for-next

Browse Source 
Fast-forward merge with Linus to be able to merge patches
based on more recent version of the tree.
This commit is contained in:
Jiri Kosina
2011-09-15 15:08:05 +02:00
parent 10e4ac572e cc39c6a9bb
commit e060c38434
3980 changed files with 199230 additions and 61613 deletions
Download Patch File Download Diff File Expand all files Collapse all files

74
mm/vmscan.c
View File

@@ -95,8 +95,6 @@ struct scan_control {
/* Can pages be swapped as part of reclaim? */
int may_swap;
int swappiness;
int order;
/*
@@ -173,7 +171,8 @@ static unsigned long zone_nr_lru_pages(struct zone *zone,
struct scan_control *sc, enum lru_list lru)
{
if (!scanning_global_lru(sc))
return mem_cgroup_zone_nr_lru_pages(sc->mem_cgroup, zone, lru);
return mem_cgroup_zone_nr_lru_pages(sc->mem_cgroup,
zone_to_nid(zone), zone_idx(zone), BIT(lru));
return zone_page_state(zone, NR_LRU_BASE + lru);
}
@@ -1770,6 +1769,13 @@ static unsigned long shrink_list(enum lru_list lru, unsigned long nr_to_scan,
return shrink_inactive_list(nr_to_scan, zone, sc, priority, file);
}
static int vmscan_swappiness(struct scan_control *sc)
{
if (scanning_global_lru(sc))
return vm_swappiness;
return mem_cgroup_swappiness(sc->mem_cgroup);
}
/*
* Determine how aggressively the anon and file LRU lists should be
* scanned. The relative value of each set of LRU lists is determined
@@ -1788,22 +1794,15 @@ static void get_scan_count(struct zone *zone, struct scan_control *sc,
u64 fraction[2], denominator;
enum lru_list l;
int noswap = 0;
int force_scan = 0;
bool force_scan = false;
unsigned long nr_force_scan[2];
anon = zone_nr_lru_pages(zone, sc, LRU_ACTIVE_ANON) +
zone_nr_lru_pages(zone, sc, LRU_INACTIVE_ANON);
file = zone_nr_lru_pages(zone, sc, LRU_ACTIVE_FILE) +
zone_nr_lru_pages(zone, sc, LRU_INACTIVE_FILE);
if (((anon + file) >> priority) < SWAP_CLUSTER_MAX) {
/* kswapd does zone balancing and need to scan this zone */
if (scanning_global_lru(sc) && current_is_kswapd())
force_scan = 1;
/* memcg may have small limit and need to avoid priority drop */
if (!scanning_global_lru(sc))
force_scan = 1;
}
/* kswapd does zone balancing and needs to scan this zone */
if (scanning_global_lru(sc) && current_is_kswapd())
force_scan = true;
/* memcg may have small limit and need to avoid priority drop */
if (!scanning_global_lru(sc))
force_scan = true;
/* If we have no swap space, do not bother scanning anon pages. */
if (!sc->may_swap || (nr_swap_pages <= 0)) {
@@ -1811,9 +1810,16 @@ static void get_scan_count(struct zone *zone, struct scan_control *sc,
fraction[0] = 0;
fraction[1] = 1;
denominator = 1;
nr_force_scan[0] = 0;
nr_force_scan[1] = SWAP_CLUSTER_MAX;
goto out;
}
anon = zone_nr_lru_pages(zone, sc, LRU_ACTIVE_ANON) +
zone_nr_lru_pages(zone, sc, LRU_INACTIVE_ANON);
file = zone_nr_lru_pages(zone, sc, LRU_ACTIVE_FILE) +
zone_nr_lru_pages(zone, sc, LRU_INACTIVE_FILE);
if (scanning_global_lru(sc)) {
free = zone_page_state(zone, NR_FREE_PAGES);
/* If we have very few page cache pages,
@@ -1822,6 +1828,8 @@ static void get_scan_count(struct zone *zone, struct scan_control *sc,
fraction[0] = 1;
fraction[1] = 0;
denominator = 1;
nr_force_scan[0] = SWAP_CLUSTER_MAX;
nr_force_scan[1] = 0;
goto out;
}
}
@@ -1830,8 +1838,8 @@ static void get_scan_count(struct zone *zone, struct scan_control *sc,
* With swappiness at 100, anonymous and file have the same priority.
* This scanning priority is essentially the inverse of IO cost.
*/
anon_prio = sc->swappiness;
file_prio = 200 - sc->swappiness;
anon_prio = vmscan_swappiness(sc);
file_prio = 200 - vmscan_swappiness(sc);
/*
* OK, so we have swap space and a fair amount of page cache
@@ -1870,6 +1878,11 @@ static void get_scan_count(struct zone *zone, struct scan_control *sc,
fraction[0] = ap;
fraction[1] = fp;
denominator = ap + fp + 1;
if (force_scan) {
unsigned long scan = SWAP_CLUSTER_MAX;
nr_force_scan[0] = div64_u64(scan * ap, denominator);
nr_force_scan[1] = div64_u64(scan * fp, denominator);
}
out:
for_each_evictable_lru(l) {
int file = is_file_lru(l);
@@ -1890,12 +1903,8 @@ out:
* memcg, priority drop can cause big latency. So, it's better
* to scan small amount. See may_noscan above.
*/
if (!scan && force_scan) {
if (file)
scan = SWAP_CLUSTER_MAX;
else if (!noswap)
scan = SWAP_CLUSTER_MAX;
}
if (!scan && force_scan)
scan = nr_force_scan[file];
nr[l] = scan;
}
}
@@ -2220,7 +2229,6 @@ unsigned long try_to_free_pages(struct zonelist *zonelist, int order,
.nr_to_reclaim = SWAP_CLUSTER_MAX,
.may_unmap = 1,
.may_swap = 1,
.swappiness = vm_swappiness,
.order = order,
.mem_cgroup = NULL,
.nodemask = nodemask,
@@ -2244,7 +2252,6 @@ unsigned long try_to_free_pages(struct zonelist *zonelist, int order,
unsigned long mem_cgroup_shrink_node_zone(struct mem_cgroup *mem,
gfp_t gfp_mask, bool noswap,
unsigned int swappiness,
struct zone *zone,
unsigned long *nr_scanned)
{
@@ -2254,7 +2261,6 @@ unsigned long mem_cgroup_shrink_node_zone(struct mem_cgroup *mem,
.may_writepage = !laptop_mode,
.may_unmap = 1,
.may_swap = !noswap,
.swappiness = swappiness,
.order = 0,
.mem_cgroup = mem,
};
@@ -2283,8 +2289,7 @@ unsigned long mem_cgroup_shrink_node_zone(struct mem_cgroup *mem,
unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *mem_cont,
gfp_t gfp_mask,
bool noswap,
unsigned int swappiness)
bool noswap)
{
struct zonelist *zonelist;
unsigned long nr_reclaimed;
@@ -2294,7 +2299,6 @@ unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *mem_cont,
.may_unmap = 1,
.may_swap = !noswap,
.nr_to_reclaim = SWAP_CLUSTER_MAX,
.swappiness = swappiness,
.order = 0,
.mem_cgroup = mem_cont,
.nodemask = NULL, /* we don't care the placement */
@@ -2445,7 +2449,6 @@ static unsigned long balance_pgdat(pg_data_t *pgdat, int order,
* we want to put equal scanning pressure on each zone.
*/
.nr_to_reclaim = ULONG_MAX,
.swappiness = vm_swappiness,
.order = order,
.mem_cgroup = NULL,
};
@@ -2494,6 +2497,9 @@ loop_again:
high_wmark_pages(zone), 0, 0)) {
end_zone = i;
break;
} else {
/* If balanced, clear the congested flag */
zone_clear_flag(zone, ZONE_CONGESTED);
}
}
if (i < 0)
@@ -2915,7 +2921,6 @@ unsigned long shrink_all_memory(unsigned long nr_to_reclaim)
.may_writepage = 1,
.nr_to_reclaim = nr_to_reclaim,
.hibernation_mode = 1,
.swappiness = vm_swappiness,
.order = 0,
};
struct shrink_control shrink = {
@@ -3102,7 +3107,6 @@ static int __zone_reclaim(struct zone *zone, gfp_t gfp_mask, unsigned int order)
.nr_to_reclaim = max_t(unsigned long, nr_pages,
SWAP_CLUSTER_MAX),
.gfp_mask = gfp_mask,
.swappiness = vm_swappiness,
.order = order,
};
struct shrink_control shrink = {