From: js1304@gmail.com
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Rik van Riel <riel@redhat.com>,
Johannes Weiner <hannes@cmpxchg.org>,
mgorman@techsingularity.net, Laura Abbott <lauraa@codeaurora.org>,
Minchan Kim <minchan@kernel.org>,
Marek Szyprowski <m.szyprowski@samsung.com>,
Michal Nazarewicz <mina86@mina86.com>,
"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
Vlastimil Babka <vbabka@suse.cz>,
Rui Teng <rui.teng@linux.vnet.ibm.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Joonsoo Kim <iamjoonsoo.kim@lge.com>
Subject: [PATCH v3 1/6] mm/page_alloc: recalculate some of zone threshold when on/offline memory
Date: Thu, 26 May 2016 15:22:23 +0900 [thread overview]
Message-ID: <1464243748-16367-2-git-send-email-iamjoonsoo.kim@lge.com> (raw)
In-Reply-To: <1464243748-16367-1-git-send-email-iamjoonsoo.kim@lge.com>
From: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Some of zone threshold depends on number of managed pages in the zone.
When memory is going on/offline, it can be changed and we need to
adjust them.
This patch add recalculation to appropriate places and clean-up
related function for better maintanance.
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
---
mm/page_alloc.c | 36 +++++++++++++++++++++++++++++-------
1 file changed, 29 insertions(+), 7 deletions(-)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index d27e8b9..90e5a82 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -4874,6 +4874,8 @@ int local_memory_node(int node)
}
#endif
+static void setup_min_unmapped_ratio(struct zone *zone);
+static void setup_min_slab_ratio(struct zone *zone);
#else /* CONFIG_NUMA */
static void set_zonelist_order(void)
@@ -5988,9 +5990,8 @@ static void __paginginit free_area_init_core(struct pglist_data *pgdat)
zone->managed_pages = is_highmem_idx(j) ? realsize : freesize;
#ifdef CONFIG_NUMA
zone->node = nid;
- zone->min_unmapped_pages = (freesize*sysctl_min_unmapped_ratio)
- / 100;
- zone->min_slab_pages = (freesize * sysctl_min_slab_ratio) / 100;
+ setup_min_unmapped_ratio(zone);
+ setup_min_slab_ratio(zone);
#endif
zone->name = zone_names[j];
spin_lock_init(&zone->lock);
@@ -6896,6 +6897,7 @@ int __meminit init_per_zone_wmark_min(void)
{
unsigned long lowmem_kbytes;
int new_min_free_kbytes;
+ struct zone *zone;
lowmem_kbytes = nr_free_buffer_pages() * (PAGE_SIZE >> 10);
new_min_free_kbytes = int_sqrt(lowmem_kbytes * 16);
@@ -6913,6 +6915,14 @@ int __meminit init_per_zone_wmark_min(void)
setup_per_zone_wmarks();
refresh_zone_stat_thresholds();
setup_per_zone_lowmem_reserve();
+
+ for_each_zone(zone) {
+#ifdef CONFIG_NUMA
+ setup_min_unmapped_ratio(zone);
+ setup_min_slab_ratio(zone);
+#endif
+ }
+
return 0;
}
core_initcall(init_per_zone_wmark_min)
@@ -6954,6 +6964,12 @@ int watermark_scale_factor_sysctl_handler(struct ctl_table *table, int write,
}
#ifdef CONFIG_NUMA
+static void setup_min_unmapped_ratio(struct zone *zone)
+{
+ zone->min_unmapped_pages = (zone->managed_pages *
+ sysctl_min_unmapped_ratio) / 100;
+}
+
int sysctl_min_unmapped_ratio_sysctl_handler(struct ctl_table *table, int write,
void __user *buffer, size_t *length, loff_t *ppos)
{
@@ -6965,11 +6981,17 @@ int sysctl_min_unmapped_ratio_sysctl_handler(struct ctl_table *table, int write,
return rc;
for_each_zone(zone)
- zone->min_unmapped_pages = (zone->managed_pages *
- sysctl_min_unmapped_ratio) / 100;
+ setup_min_unmapped_ratio(zone);
+
return 0;
}
+static void setup_min_slab_ratio(struct zone *zone)
+{
+ zone->min_slab_pages = (zone->managed_pages *
+ sysctl_min_slab_ratio) / 100;
+}
+
int sysctl_min_slab_ratio_sysctl_handler(struct ctl_table *table, int write,
void __user *buffer, size_t *length, loff_t *ppos)
{
@@ -6981,8 +7003,8 @@ int sysctl_min_slab_ratio_sysctl_handler(struct ctl_table *table, int write,
return rc;
for_each_zone(zone)
- zone->min_slab_pages = (zone->managed_pages *
- sysctl_min_slab_ratio) / 100;
+ setup_min_slab_ratio(zone);
+
return 0;
}
#endif
--
1.9.1
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next prev parent reply other threads:[~2016-05-26 6:22 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-26 6:22 [PATCH v3 0/6] Introduce ZONE_CMA js1304
2016-05-26 6:22 ` js1304 [this message]
2016-06-24 13:20 ` [PATCH v3 1/6] mm/page_alloc: recalculate some of zone threshold when on/offline memory Vlastimil Babka
2016-06-28 8:12 ` Joonsoo Kim
2016-05-26 6:22 ` [PATCH v3 2/6] mm/cma: introduce new zone, ZONE_CMA js1304
2016-05-26 6:22 ` [PATCH v3 3/6] mm/cma: populate ZONE_CMA js1304
2016-06-22 9:23 ` Chen Feng
2016-06-23 2:52 ` Joonsoo Kim
2016-06-28 11:23 ` Chen Feng
2016-06-29 8:00 ` Joonsoo Kim
2016-06-27 8:24 ` Vlastimil Babka
2016-06-28 8:31 ` Joonsoo Kim
2016-05-26 6:22 ` [PATCH v3 4/6] mm/cma: remove ALLOC_CMA js1304
2016-06-27 9:30 ` Vlastimil Babka
2016-06-28 8:16 ` Joonsoo Kim
2016-05-26 6:22 ` [PATCH v3 5/6] mm/cma: remove MIGRATE_CMA js1304
2016-05-27 1:42 ` Chen Feng
2016-05-27 5:32 ` Joonsoo Kim
2016-06-27 9:46 ` Vlastimil Babka
2016-06-28 8:17 ` Joonsoo Kim
2016-05-26 6:22 ` [PATCH v3 6/6] mm/cma: remove per zone CMA stat js1304
2016-06-27 9:54 ` Vlastimil Babka
2016-05-26 8:04 ` [PATCH v3 0/6] Introduce ZONE_CMA Feng Tang
2016-05-27 5:28 ` Joonsoo Kim
2016-05-27 6:25 ` Feng Tang
2016-05-27 6:42 ` Joonsoo Kim
2016-05-27 7:27 ` Feng Tang
2016-05-30 5:45 ` Joonsoo Kim
2016-06-17 7:38 ` Chen Feng
2016-06-20 6:48 ` Joonsoo Kim
2016-06-21 2:08 ` Chen Feng
2016-06-21 6:56 ` Joonsoo Kim
2016-06-27 11:25 ` Balbir Singh
2016-06-29 7:57 ` Joonsoo Kim
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