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authorJohannes Weiner <hannes@cmpxchg.org>2017-07-06 15:40:52 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2017-07-06 16:24:35 -0700
commit00f3ca2c2d6635d85108571c4dd9a29088668662 (patch)
treed85532fc7416bcb2dc7c442f8ebf5536fb684ad5 /mm/rmap.c
parented52be7bfd45533b194b429f43361493d24599a7 (diff)
downloadlwn-00f3ca2c2d6635d85108571c4dd9a29088668662.tar.gz
lwn-00f3ca2c2d6635d85108571c4dd9a29088668662.zip
mm: memcontrol: per-lruvec stats infrastructure
lruvecs are at the intersection of the NUMA node and memcg, which is the scope for most paging activity. Introduce a convenient accounting infrastructure that maintains statistics per node, per memcg, and the lruvec itself. Then convert over accounting sites for statistics that are already tracked in both nodes and memcgs and can be easily switched. [hannes@cmpxchg.org: fix crash in the new cgroup stat keeping code] Link: http://lkml.kernel.org/r/20170531171450.GA10481@cmpxchg.org [hannes@cmpxchg.org: don't track uncharged pages at all Link: http://lkml.kernel.org/r/20170605175254.GA8547@cmpxchg.org [hannes@cmpxchg.org: add missing free_percpu()] Link: http://lkml.kernel.org/r/20170605175354.GB8547@cmpxchg.org [linux@roeck-us.net: hexagon: fix build error caused by include file order] Link: http://lkml.kernel.org/r/20170617153721.GA4382@roeck-us.net Link: http://lkml.kernel.org/r/20170530181724.27197-6-hannes@cmpxchg.org Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Acked-by: Vladimir Davydov <vdavydov.dev@gmail.com> Cc: Josef Bacik <josef@toxicpanda.com> Cc: Michal Hocko <mhocko@suse.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>
Diffstat (limited to 'mm/rmap.c')
-rw-r--r--mm/rmap.c8
1 files changed, 3 insertions, 5 deletions
diff --git a/mm/rmap.c b/mm/rmap.c
index b255743351e5..ced14f1af6dc 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -1145,8 +1145,7 @@ void page_add_file_rmap(struct page *page, bool compound)
if (!atomic_inc_and_test(&page->_mapcount))
goto out;
}
- __mod_node_page_state(page_pgdat(page), NR_FILE_MAPPED, nr);
- mod_memcg_page_state(page, NR_FILE_MAPPED, nr);
+ __mod_lruvec_page_state(page, NR_FILE_MAPPED, nr);
out:
unlock_page_memcg(page);
}
@@ -1181,12 +1180,11 @@ static void page_remove_file_rmap(struct page *page, bool compound)
}
/*
- * We use the irq-unsafe __{inc|mod}_zone_page_state because
+ * We use the irq-unsafe __{inc|mod}_lruvec_page_state because
* these counters are not modified in interrupt context, and
* pte lock(a spinlock) is held, which implies preemption disabled.
*/
- __mod_node_page_state(page_pgdat(page), NR_FILE_MAPPED, -nr);
- mod_memcg_page_state(page, NR_FILE_MAPPED, -nr);
+ __mod_lruvec_page_state(page, NR_FILE_MAPPED, -nr);
if (unlikely(PageMlocked(page)))
clear_page_mlock(page);