The patch titled
Subject: mm: memcontrol: implement lruvec stat functions on top of each other
has been added to the -mm tree. Its filename is
mm-memcontrol-implement-lruvec-stat-functions-on-top-of-each-other.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-memcontrol-implement-lruvec-stat-functions-on-top-of-each-other.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-memcontrol-implement-lruvec-stat-functions-on-top-of-each-other.patch
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------------------------------------------------------
From: Johannes Weiner <hannes@xxxxxxxxxxx>
Subject: mm: memcontrol: implement lruvec stat functions on top of each other
The implementation of the lruvec stat functions and their variants for
accounting through a page, or accounting from a preemptible context, are
mostly identical and needlessly repetitive.
Implement the lruvec_page functions by looking up the page's lruvec and
then using the lruvec function.
Implement the functions for preemptible contexts by disabling preemption
before calling the atomic context functions.
Link: http://lkml.kernel.org/r/20171103153336.24044-2-hannes@xxxxxxxxxxx
Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Acked-by: Vladimir Davydov <vdavydov.dev@xxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/memcontrol.h | 44 +++++++++++++++++------------------
1 file changed, 22 insertions(+), 22 deletions(-)
diff -puN include/linux/memcontrol.h~mm-memcontrol-implement-lruvec-stat-functions-on-top-of-each-other include/linux/memcontrol.h
--- a/include/linux/memcontrol.h~mm-memcontrol-implement-lruvec-stat-functions-on-top-of-each-other
+++ a/include/linux/memcontrol.h
@@ -569,51 +569,51 @@ static inline void __mod_lruvec_state(st
{
struct mem_cgroup_per_node *pn;
+ /* Update node */
__mod_node_page_state(lruvec_pgdat(lruvec), idx, val);
+
if (mem_cgroup_disabled())
return;
+
pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec);
+
+ /* Update memcg */
__mod_memcg_state(pn->memcg, idx, val);
+
+ /* Update lruvec */
__this_cpu_add(pn->lruvec_stat->count[idx], val);
}
static inline void mod_lruvec_state(struct lruvec *lruvec,
enum node_stat_item idx, int val)
{
- struct mem_cgroup_per_node *pn;
-
- mod_node_page_state(lruvec_pgdat(lruvec), idx, val);
- if (mem_cgroup_disabled())
- return;
- pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec);
- mod_memcg_state(pn->memcg, idx, val);
- this_cpu_add(pn->lruvec_stat->count[idx], val);
+ preempt_disable();
+ __mod_lruvec_state(lruvec, idx, val);
+ preempt_enable();
}
static inline void __mod_lruvec_page_state(struct page *page,
enum node_stat_item idx, int val)
{
- struct mem_cgroup_per_node *pn;
+ pg_data_t *pgdat = page_pgdat(page);
+ struct lruvec *lruvec;
- __mod_node_page_state(page_pgdat(page), idx, val);
- if (mem_cgroup_disabled() || !page->mem_cgroup)
+ /* Untracked pages have no memcg, no lruvec. Update only the node */
+ if (!page->mem_cgroup) {
+ __mod_node_page_state(pgdat, idx, val);
return;
- __mod_memcg_state(page->mem_cgroup, idx, val);
- pn = page->mem_cgroup->nodeinfo[page_to_nid(page)];
- __this_cpu_add(pn->lruvec_stat->count[idx], val);
+ }
+
+ lruvec = mem_cgroup_lruvec(pgdat, page->mem_cgroup);
+ __mod_lruvec_state(lruvec, idx, val);
}
static inline void mod_lruvec_page_state(struct page *page,
enum node_stat_item idx, int val)
{
- struct mem_cgroup_per_node *pn;
-
- mod_node_page_state(page_pgdat(page), idx, val);
- if (mem_cgroup_disabled() || !page->mem_cgroup)
- return;
- mod_memcg_state(page->mem_cgroup, idx, val);
- pn = page->mem_cgroup->nodeinfo[page_to_nid(page)];
- this_cpu_add(pn->lruvec_stat->count[idx], val);
+ preempt_disable();
+ __mod_lruvec_page_state(page, idx, val);
+ preempt_enable();
}
unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order,
_
Patches currently in -mm which might be from hannes@xxxxxxxxxxx are
mm-memcontrol-eliminate-raw-access-to-stat-and-event-counters.patch
mm-memcontrol-implement-lruvec-stat-functions-on-top-of-each-other.patch
mm-memcontrol-fix-excessive-complexity-in-memorystat-reporting.patch
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