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authorJohannes Weiner <hannes@cmpxchg.org>2017-07-07 01:40:43 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2017-07-07 02:24:35 +0300
commit385386cff4c6f047907655e05791d88198c4c523 (patch)
treed2dad3e3c9acdd389dd63a89c498fbedb284befa
parent2b2695f5fdf185092a72c81ca2c09ed1b9b37416 (diff)
downloadlinux-385386cff4c6f047907655e05791d88198c4c523.tar.xz
mm: vmstat: move slab statistics from zone to node counters
Patch series "mm: per-lruvec slab stats" Josef is working on a new approach to balancing slab caches and the page cache. For this to work, he needs slab cache statistics on the lruvec level. These patches implement that by adding infrastructure that allows updating and reading generic VM stat items per lruvec, then switches some existing VM accounting sites, including the slab accounting ones, to this new cgroup-aware API. I'll follow up with more patches on this, because there is actually substantial simplification that can be done to the memory controller when we replace private memcg accounting with making the existing VM accounting sites cgroup-aware. But this is enough for Josef to base his slab reclaim work on, so here goes. This patch (of 5): To re-implement slab cache vs. page cache balancing, we'll need the slab counters at the lruvec level, which, ever since lru reclaim was moved from the zone to the node, is the intersection of the node, not the zone, and the memcg. We could retain the per-zone counters for when the page allocator dumps its memory information on failures, and have counters on both levels - which on all but NUMA node 0 is usually redundant. But let's keep it simple for now and just move them. If anybody complains we can restore the per-zone counters. [hannes@cmpxchg.org: fix oops] Link: http://lkml.kernel.org/r/20170605183511.GA8915@cmpxchg.org Link: http://lkml.kernel.org/r/20170530181724.27197-3-hannes@cmpxchg.org Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Cc: Josef Bacik <josef@toxicpanda.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Vladimir Davydov <vdavydov.dev@gmail.com> Cc: Rik van Riel <riel@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--drivers/base/node.c10
-rw-r--r--include/linux/mmzone.h4
-rw-r--r--mm/page_alloc.c7
-rw-r--r--mm/slab.c8
-rw-r--r--mm/slub.c4
-rw-r--r--mm/vmscan.c2
-rw-r--r--mm/vmstat.c4
7 files changed, 19 insertions, 20 deletions
diff --git a/drivers/base/node.c b/drivers/base/node.c
index 1da0005341a1..6b1ee371ee97 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -129,11 +129,11 @@ static ssize_t node_read_meminfo(struct device *dev,
nid, K(node_page_state(pgdat, NR_UNSTABLE_NFS)),
nid, K(sum_zone_node_page_state(nid, NR_BOUNCE)),
nid, K(node_page_state(pgdat, NR_WRITEBACK_TEMP)),
- nid, K(sum_zone_node_page_state(nid, NR_SLAB_RECLAIMABLE) +
- sum_zone_node_page_state(nid, NR_SLAB_UNRECLAIMABLE)),
- nid, K(sum_zone_node_page_state(nid, NR_SLAB_RECLAIMABLE)),
+ nid, K(node_page_state(pgdat, NR_SLAB_RECLAIMABLE) +
+ node_page_state(pgdat, NR_SLAB_UNRECLAIMABLE)),
+ nid, K(node_page_state(pgdat, NR_SLAB_RECLAIMABLE)),
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
- nid, K(sum_zone_node_page_state(nid, NR_SLAB_UNRECLAIMABLE)),
+ nid, K(node_page_state(pgdat, NR_SLAB_UNRECLAIMABLE)),
nid, K(node_page_state(pgdat, NR_ANON_THPS) *
HPAGE_PMD_NR),
nid, K(node_page_state(pgdat, NR_SHMEM_THPS) *
@@ -141,7 +141,7 @@ static ssize_t node_read_meminfo(struct device *dev,
nid, K(node_page_state(pgdat, NR_SHMEM_PMDMAPPED) *
HPAGE_PMD_NR));
#else
- nid, K(sum_zone_node_page_state(nid, NR_SLAB_UNRECLAIMABLE)));
+ nid, K(node_page_state(pgdat, NR_SLAB_UNRECLAIMABLE)));
#endif
n += hugetlb_report_node_meminfo(nid, buf + n);
return n;
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index abc1641011f2..7e8f100cb56d 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -125,8 +125,6 @@ enum zone_stat_item {
NR_ZONE_UNEVICTABLE,
NR_ZONE_WRITE_PENDING, /* Count of dirty, writeback and unstable pages */
NR_MLOCK, /* mlock()ed pages found and moved off LRU */
- NR_SLAB_RECLAIMABLE,
- NR_SLAB_UNRECLAIMABLE,
NR_PAGETABLE, /* used for pagetables */
NR_KERNEL_STACK_KB, /* measured in KiB */
/* Second 128 byte cacheline */
@@ -152,6 +150,8 @@ enum node_stat_item {
NR_INACTIVE_FILE, /* " " " " " */
NR_ACTIVE_FILE, /* " " " " " */
NR_UNEVICTABLE, /* " " " " " */
+ NR_SLAB_RECLAIMABLE,
+ NR_SLAB_UNRECLAIMABLE,
NR_ISOLATED_ANON, /* Temporary isolated pages from anon lru */
NR_ISOLATED_FILE, /* Temporary isolated pages from file lru */
WORKINGSET_REFAULT,
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 8aa860017d66..a35add8d7c0b 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -4643,8 +4643,6 @@ void show_free_areas(unsigned int filter, nodemask_t *nodemask)
" present:%lukB"
" managed:%lukB"
" mlocked:%lukB"
- " slab_reclaimable:%lukB"
- " slab_unreclaimable:%lukB"
" kernel_stack:%lukB"
" pagetables:%lukB"
" bounce:%lukB"
@@ -4666,8 +4664,6 @@ void show_free_areas(unsigned int filter, nodemask_t *nodemask)
K(zone->present_pages),
K(zone->managed_pages),
K(zone_page_state(zone, NR_MLOCK)),
- K(zone_page_state(zone, NR_SLAB_RECLAIMABLE)),
- K(zone_page_state(zone, NR_SLAB_UNRECLAIMABLE)),
zone_page_state(zone, NR_KERNEL_STACK_KB),
K(zone_page_state(zone, NR_PAGETABLE)),
K(zone_page_state(zone, NR_BOUNCE)),
@@ -5153,6 +5149,7 @@ static void build_zonelists(pg_data_t *pgdat)
*/
static void setup_pageset(struct per_cpu_pageset *p, unsigned long batch);
static DEFINE_PER_CPU(struct per_cpu_pageset, boot_pageset);
+static DEFINE_PER_CPU(struct per_cpu_nodestat, boot_nodestats);
static void setup_zone_pageset(struct zone *zone);
/*
@@ -6053,6 +6050,8 @@ static void __paginginit free_area_init_core(struct pglist_data *pgdat)
spin_lock_init(&pgdat->lru_lock);
lruvec_init(node_lruvec(pgdat));
+ pgdat->per_cpu_nodestats = &boot_nodestats;
+
for (j = 0; j < MAX_NR_ZONES; j++) {
struct zone *zone = pgdat->node_zones + j;
unsigned long size, realsize, freesize, memmap_pages;
diff --git a/mm/slab.c b/mm/slab.c
index 503317188926..a38634ed478e 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -1425,10 +1425,10 @@ static struct page *kmem_getpages(struct kmem_cache *cachep, gfp_t flags,
nr_pages = (1 << cachep->gfporder);
if (cachep->flags & SLAB_RECLAIM_ACCOUNT)
- add_zone_page_state(page_zone(page),
+ add_node_page_state(page_pgdat(page),
NR_SLAB_RECLAIMABLE, nr_pages);
else
- add_zone_page_state(page_zone(page),
+ add_node_page_state(page_pgdat(page),
NR_SLAB_UNRECLAIMABLE, nr_pages);
__SetPageSlab(page);
@@ -1459,10 +1459,10 @@ static void kmem_freepages(struct kmem_cache *cachep, struct page *page)
kmemcheck_free_shadow(page, order);
if (cachep->flags & SLAB_RECLAIM_ACCOUNT)
- sub_zone_page_state(page_zone(page),
+ sub_node_page_state(page_pgdat(page),
NR_SLAB_RECLAIMABLE, nr_freed);
else
- sub_zone_page_state(page_zone(page),
+ sub_node_page_state(page_pgdat(page),
NR_SLAB_UNRECLAIMABLE, nr_freed);
BUG_ON(!PageSlab(page));
diff --git a/mm/slub.c b/mm/slub.c
index 388f66d1da5e..aa5aa6bfb35e 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -1615,7 +1615,7 @@ out:
if (!page)
return NULL;
- mod_zone_page_state(page_zone(page),
+ mod_node_page_state(page_pgdat(page),
(s->flags & SLAB_RECLAIM_ACCOUNT) ?
NR_SLAB_RECLAIMABLE : NR_SLAB_UNRECLAIMABLE,
1 << oo_order(oo));
@@ -1655,7 +1655,7 @@ static void __free_slab(struct kmem_cache *s, struct page *page)
kmemcheck_free_shadow(page, compound_order(page));
- mod_zone_page_state(page_zone(page),
+ mod_node_page_state(page_pgdat(page),
(s->flags & SLAB_RECLAIM_ACCOUNT) ?
NR_SLAB_RECLAIMABLE : NR_SLAB_UNRECLAIMABLE,
-pages);
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 7d3c6c59897c..9e95fafc026b 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -3874,7 +3874,7 @@ int node_reclaim(struct pglist_data *pgdat, gfp_t gfp_mask, unsigned int order)
* unmapped file backed pages.
*/
if (node_pagecache_reclaimable(pgdat) <= pgdat->min_unmapped_pages &&
- sum_zone_node_page_state(pgdat->node_id, NR_SLAB_RECLAIMABLE) <= pgdat->min_slab_pages)
+ node_page_state(pgdat, NR_SLAB_RECLAIMABLE) <= pgdat->min_slab_pages)
return NODE_RECLAIM_FULL;
/*
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 46281825c710..744ceaeb42a0 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -928,8 +928,6 @@ const char * const vmstat_text[] = {
"nr_zone_unevictable",
"nr_zone_write_pending",
"nr_mlock",
- "nr_slab_reclaimable",
- "nr_slab_unreclaimable",
"nr_page_table_pages",
"nr_kernel_stack",
"nr_bounce",
@@ -952,6 +950,8 @@ const char * const vmstat_text[] = {
"nr_inactive_file",
"nr_active_file",
"nr_unevictable",
+ "nr_slab_reclaimable",
+ "nr_slab_unreclaimable",
"nr_isolated_anon",
"nr_isolated_file",
"workingset_refault",