Pass GFP flags to [__]zone_watermark_ok() and use them to account
free CMA pages only when necessary (there is no need to check
watermark against only non-CMA free pages for movable allocations).
Cc: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Cc: Michal Nazarewicz <mina86@xxxxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@xxxxxxxxxxx>
Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
---
include/linux/mmzone.h | 2 +-
mm/compaction.c | 11 ++++++-----
mm/page_alloc.c | 29 +++++++++++++++++++----------
mm/vmscan.c | 4 ++--
4 files changed, 28 insertions(+), 18 deletions(-)
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 904889d..308bb91 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -725,7 +725,7 @@ extern struct mutex zonelists_mutex;
void build_all_zonelists(pg_data_t *pgdat, struct zone *zone);
void wakeup_kswapd(struct zone *zone, int order, enum zone_type classzone_idx);
bool zone_watermark_ok(struct zone *z, int order, unsigned long mark,
- int classzone_idx, int alloc_flags);
+ int classzone_idx, int alloc_flags, gfp_t gfp_flags);
bool zone_watermark_ok_safe(struct zone *z, int order, unsigned long mark,
int classzone_idx, int alloc_flags);
enum memmap_context {
diff --git a/mm/compaction.c b/mm/compaction.c
index 4b902aa..080175a 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -684,7 +684,7 @@ static int compact_finished(struct zone *zone,
watermark = low_wmark_pages(zone);
watermark += (1 << cc->order);
- if (!zone_watermark_ok(zone, cc->order, watermark, 0, 0))
+ if (!zone_watermark_ok(zone, cc->order, watermark, 0, 0, 0))
return COMPACT_CONTINUE;
/* Direct compactor: Is a suitable page free? */
@@ -726,7 +726,7 @@ unsigned long compaction_suitable(struct zone *zone, int order)
* allocated and for a short time, the footprint is higher
*/
watermark = low_wmark_pages(zone) + (2UL << order);
- if (!zone_watermark_ok(zone, 0, watermark, 0, 0))
+ if (!zone_watermark_ok(zone, 0, watermark, 0, 0, 0))
return COMPACT_SKIPPED;
/*
@@ -745,7 +745,7 @@ unsigned long compaction_suitable(struct zone *zone, int order)
return COMPACT_SKIPPED;
if (fragindex == -1000 && zone_watermark_ok(zone, order, watermark,
- 0, 0))
+ 0, 0, 0))
return COMPACT_PARTIAL;
return COMPACT_CONTINUE;
@@ -889,7 +889,8 @@ unsigned long try_to_compact_pages(struct zonelist *zonelist,
rc = max(status, rc);
/* If a normal allocation would succeed, stop compacting */
- if (zone_watermark_ok(zone, order, low_wmark_pages(zone), 0, 0))
+ if (zone_watermark_ok(zone, order, low_wmark_pages(zone), 0, 0,
+ gfp_mask))
break;
}
@@ -920,7 +921,7 @@ static int __compact_pgdat(pg_data_t *pgdat, struct compact_control *cc)
if (cc->order > 0) {
int ok = zone_watermark_ok(zone, cc->order,
- low_wmark_pages(zone), 0, 0);
+ low_wmark_pages(zone), 0, 0, 0);
if (ok && cc->order >= zone->compact_order_failed)
zone->compact_order_failed = cc->order + 1;
/* Currently async compaction is never deferred. */
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 2166774..5912a8c 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1423,7 +1423,7 @@ int split_free_page(struct page *page, bool check_wmark)
if (check_wmark) {
/* Obey watermarks as if the page was being allocated */
watermark = low_wmark_pages(zone) + (1 << order);
- if (!zone_watermark_ok(zone, 0, watermark, 0, 0))
+ if (!zone_watermark_ok(zone, 0, watermark, 0, 0, 0))
return 0;
}
@@ -1628,12 +1628,13 @@ static inline bool should_fail_alloc_page(gfp_t gfp_mask, unsigned int order)
* of the allocation.
*/
static bool __zone_watermark_ok(struct zone *z, int order, unsigned long mark,
- int classzone_idx, int alloc_flags, long free_pages, long free_cma_pages)
+ int classzone_idx, int alloc_flags, long free_pages,
+ long free_cma_pages, gfp_t gfp_flags)
{
/* free_pages my go negative - that's OK */
long min = mark;
long lowmem_reserve = z->lowmem_reserve[classzone_idx];
- int o;
+ int mt, o;
free_pages -= (1 << order) - 1;
if (alloc_flags & ALLOC_HIGH)
@@ -1641,8 +1642,14 @@ static bool __zone_watermark_ok(struct zone *z, int order, unsigned long mark,
if (alloc_flags & ALLOC_HARDER)
min -= min / 4;
- if (free_pages - free_cma_pages <= min + lowmem_reserve)
- return false;
+ mt = allocflags_to_migratetype(gfp_flags);
+ if (mt == MIGRATE_MOVABLE) {
+ if (free_pages <= min + lowmem_reserve)
+ return false;
+ } else {
+ if (free_pages - free_cma_pages <= min + lowmem_reserve)
+ return false;
+ }
for (o = 0; o < order; o++) {
/* At the next order, this order's pages become unavailable */
free_pages -= z->free_area[o].nr_free << o;
@@ -1671,11 +1678,12 @@ static inline unsigned long nr_zone_isolate_freepages(struct zone *zone)
#endif
bool zone_watermark_ok(struct zone *z, int order, unsigned long mark,
- int classzone_idx, int alloc_flags)
+ int classzone_idx, int alloc_flags, gfp_t gfp_flags)
{
return __zone_watermark_ok(z, order, mark, classzone_idx, alloc_flags,
zone_page_state(z, NR_FREE_PAGES),
- zone_page_state(z, NR_FREE_CMA_PAGES));
+ zone_page_state(z, NR_FREE_CMA_PAGES),
+ gfp_flags);
}
bool zone_watermark_ok_safe(struct zone *z, int order, unsigned long mark,
@@ -1696,7 +1704,7 @@ bool zone_watermark_ok_safe(struct zone *z, int order, unsigned long mark,
*/
free_pages -= nr_zone_isolate_freepages(z);
return __zone_watermark_ok(z, order, mark, classzone_idx, alloc_flags,
- free_pages, free_cma_pages);
+ free_pages, free_cma_pages, 0);
}
#ifdef CONFIG_NUMA
@@ -1906,7 +1914,7 @@ zonelist_scan:
mark = zone->watermark[alloc_flags & ALLOC_WMARK_MASK];
if (zone_watermark_ok(zone, order, mark,
- classzone_idx, alloc_flags))
+ classzone_idx, alloc_flags, gfp_mask))
goto try_this_zone;
if (NUMA_BUILD && !did_zlc_setup && nr_online_nodes > 1) {
@@ -1942,7 +1950,8 @@ zonelist_scan:
default:
/* did we reclaim enough */
if (!zone_watermark_ok(zone, order, mark,
- classzone_idx, alloc_flags))
+ classzone_idx, alloc_flags,
+ gfp_mask))
goto this_zone_full;
}
}
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 8d01243..4a10038b 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2777,14 +2777,14 @@ out:
/* Confirm the zone is balanced for order-0 */
if (!zone_watermark_ok(zone, 0,
- high_wmark_pages(zone), 0, 0)) {
+ high_wmark_pages(zone), 0, 0, 0)) {
order = sc.order = 0;
goto loop_again;
}
/* Check if the memory needs to be defragmented. */
if (zone_watermark_ok(zone, order,
- low_wmark_pages(zone), *classzone_idx, 0))
+ low_wmark_pages(zone), *classzone_idx, 0, 0))
zones_need_compaction = 0;
/* If balanced, clear the congested flag */
--
1.7.11.3
--
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