@@ -5899,7 +5899,7 @@ static void build_zonelists(pg_data_t *pgdat)
* not check if the processor is online before following the pageset pointer.
* Other parts of the kernel may not check if the zone is available.
*/
-static void setup_pageset(struct per_cpu_pageset *p, unsigned long batch);
+static void setup_pageset(struct per_cpu_pageset *p);
static DEFINE_PER_CPU(struct per_cpu_pageset, boot_pageset);
static DEFINE_PER_CPU(struct per_cpu_nodestat, boot_nodestats);
@@ -5967,7 +5967,7 @@ build_all_zonelists_init(void)
* (a chicken-egg dilemma).
*/
for_each_possible_cpu(cpu)
- setup_pageset(&per_cpu(boot_pageset, cpu), 0);
+ setup_pageset(&per_cpu(boot_pageset, cpu));
mminit_verify_zonelist();
cpuset_init_current_mems_allowed();
@@ -6276,12 +6276,6 @@ static void pageset_update(struct per_cpu_pages *pcp, unsigned long high,
pcp->batch = batch;
}
-/* a companion to pageset_set_high() */
-static void pageset_set_batch(struct per_cpu_pageset *p, unsigned long batch)
-{
- pageset_update(&p->pcp, 6 * batch, max(1UL, 1 * batch));
-}
-
static void pageset_init(struct per_cpu_pageset *p)
{
struct per_cpu_pages *pcp;
@@ -6294,35 +6288,32 @@ static void pageset_init(struct per_cpu_pageset *p)
INIT_LIST_HEAD(&pcp->lists[migratetype]);
}
-static void setup_pageset(struct per_cpu_pageset *p, unsigned long batch)
+static void setup_pageset(struct per_cpu_pageset *p)
{
pageset_init(p);
- pageset_set_batch(p, batch);
+ pageset_update(&p->pcp, 0, 1);
}
/*
- * pageset_set_high() sets the high water mark for hot per_cpu_pagelist
- * to the value high for the pageset p.
+ * Calculate and set new high and batch values for given per-cpu pageset of a
+ * zone, based on the zone's size and the percpu_pagelist_fraction sysctl.
*/
-static void pageset_set_high(struct per_cpu_pageset *p,
- unsigned long high)
-{
- unsigned long batch = max(1UL, high / 4);
- if ((high / 4) > (PAGE_SHIFT * 8))
- batch = PAGE_SHIFT * 8;
-
- pageset_update(&p->pcp, high, batch);
-}
-
static void pageset_set_high_and_batch(struct zone *zone,
- struct per_cpu_pageset *pcp)
+ struct per_cpu_pageset *p)
{
- if (percpu_pagelist_fraction)
- pageset_set_high(pcp,
- (zone_managed_pages(zone) /
- percpu_pagelist_fraction));
- else
- pageset_set_batch(pcp, zone_batchsize(zone));
+ unsigned long new_high, new_batch;
+
+ if (percpu_pagelist_fraction) {
+ new_high = zone_managed_pages(zone) / percpu_pagelist_fraction;
+ new_batch = max(1UL, new_high / 4);
+ if ((new_high / 4) > (PAGE_SHIFT * 8))
+ new_batch = PAGE_SHIFT * 8;
+ } else {
+ new_batch = zone_batchsize(zone);
+ new_high = 6 * new_batch;
+ new_batch = max(1UL, 1 * new_batch);
+ }
+ pageset_update(&p->pcp, new_high, new_batch);
}
static void __meminit zone_pageset_init(struct zone *zone, int cpu)
The updates to pcplists' high and batch valued are handled by multiple functions that make the calculations hard to follow. Consolidate everything to pageset_set_high_and_batch() and remove pageset_set_batch() and pageset_set_high() wrappers. The only special case using one of the removed wrappers was: build_all_zonelists_init() setup_pageset() pageset_set_batch() which was hardcoding batch as 0, so we can just open-code a call to pageset_update() with constant parameters instead. No functional change. Signed-off-by: Vlastimil Babka <vbabka@suse.cz> Reviewed-by: Oscar Salvador <osalvador@suse.de> Reviewed-by: David Hildenbrand <david@redhat.com> Acked-by: Michal Hocko <mhocko@suse.com> --- mm/page_alloc.c | 49 ++++++++++++++++++++----------------------------- 1 file changed, 20 insertions(+), 29 deletions(-)