The patch titled
Subject: mm: vmscan: simplify lruvec_lru_size()
has been removed from the -mm tree. Its filename was
mm-vmscan-simplify-lruvec_lru_size.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Johannes Weiner <hannes@xxxxxxxxxxx>
Subject: mm: vmscan: simplify lruvec_lru_size()
Patch series "mm: vmscan: cgroup-related cleanups".
Here are 8 patches that clean up the reclaim code's interaction with
cgroups a bit. They're not supposed to change any behavior, just make
the implementation easier to understand and work with.
This patch (of 8):
This function currently takes the node or lruvec size and subtracts the
zones that are excluded by the classzone index of the allocation. It uses
four different types of counters to do this.
Just add up the eligible zones.
[cai@xxxxxx: fix an undefined behavior for zone id]
Link: http://lkml.kernel.org/r/20191108204407.1435-1-cai@xxxxxx
[akpm@xxxxxxxxxxxxxxxxxxxx: deal with the MAX_NR_ZONES special case. per Qian Cai]
Link: http://lkml.kernel.org/r/64E60F6F-7582-427B-8DD5-EF97B1656F5A@xxxxxx
Link: http://lkml.kernel.org/r/20191022144803.302233-2-hannes@xxxxxxxxxxx
Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Reviewed-by: Roman Gushchin <guro@xxxxxx>
Reviewed-by: Shakeel Butt <shakeelb@xxxxxxxxxx>
Acked-by: Michal Hocko <mhocko@xxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/vmscan.c | 21 +++++----------------
1 file changed, 5 insertions(+), 16 deletions(-)
--- a/mm/vmscan.c~mm-vmscan-simplify-lruvec_lru_size
+++ a/mm/vmscan.c
@@ -351,32 +351,21 @@ unsigned long zone_reclaimable_pages(str
*/
unsigned long lruvec_lru_size(struct lruvec *lruvec, enum lru_list lru, int zone_idx)
{
- unsigned long lru_size = 0;
+ unsigned long size = 0;
int zid;
- if (!mem_cgroup_disabled()) {
- for (zid = 0; zid < MAX_NR_ZONES; zid++)
- lru_size += mem_cgroup_get_zone_lru_size(lruvec, lru, zid);
- } else
- lru_size = node_page_state(lruvec_pgdat(lruvec), NR_LRU_BASE + lru);
-
- for (zid = zone_idx + 1; zid < MAX_NR_ZONES; zid++) {
+ for (zid = 0; zid <= zone_idx && zid < MAX_NR_ZONES; zid++) {
struct zone *zone = &lruvec_pgdat(lruvec)->node_zones[zid];
- unsigned long size;
if (!managed_zone(zone))
continue;
if (!mem_cgroup_disabled())
- size = mem_cgroup_get_zone_lru_size(lruvec, lru, zid);
+ size += mem_cgroup_get_zone_lru_size(lruvec, lru, zid);
else
- size = zone_page_state(&lruvec_pgdat(lruvec)->node_zones[zid],
- NR_ZONE_LRU_BASE + lru);
- lru_size -= min(size, lru_size);
+ size += zone_page_state(zone, NR_ZONE_LRU_BASE + lru);
}
-
- return lru_size;
-
+ return size;
}
/*
_
Patches currently in -mm which might be from hannes@xxxxxxxxxxx are
