The patch titled
Subject: mm: drain percpu lru add/rotate page-vectors on cpu hot-unplug
has been added to the -mm tree. Its filename is
mm-drain-percpu-lru-add-rotate-page-vectors-on-cpu-hot-unplug.patch
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------------------------------------------------------
From: Konstantin Khlebnikov <khlebnikov@xxxxxxxxxx>
Subject: mm: drain percpu lru add/rotate page-vectors on cpu hot-unplug
This cpu hotplug hook was accidentally removed in commit
v2.6.30-rc4-18-g00a62ce ("mm: fix Committed_AS underflow on large NR_CPUS
environment")
Signed-off-by: Konstantin Khlebnikov <khlebnikov@xxxxxxxxxx>
Cc: Dave Hansen <dave@xxxxxxxxxxxxxxxxxx>
Cc: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
Cc: Eric B Munson <ebmunson@xxxxxxxxxx>
Cc: Mel Gorman <mel@xxxxxxxxx>
Cc: Christoph Lameter <cl@xxxxxxxxxxxxxxxxxxxx>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/swap.h | 1 +
mm/page_alloc.c | 1 +
mm/swap.c | 4 ++--
3 files changed, 4 insertions(+), 2 deletions(-)
diff -puN include/linux/swap.h~mm-drain-percpu-lru-add-rotate-page-vectors-on-cpu-hot-unplug include/linux/swap.h
--- a/include/linux/swap.h~mm-drain-percpu-lru-add-rotate-page-vectors-on-cpu-hot-unplug
+++ a/include/linux/swap.h
@@ -227,6 +227,7 @@ extern void lru_add_page_tail(struct zon
extern void activate_page(struct page *);
extern void mark_page_accessed(struct page *);
extern void lru_add_drain(void);
+extern void lru_add_drain_cpu(int cpu);
extern int lru_add_drain_all(void);
extern void rotate_reclaimable_page(struct page *page);
extern void deactivate_page(struct page *page);
diff -puN mm/page_alloc.c~mm-drain-percpu-lru-add-rotate-page-vectors-on-cpu-hot-unplug mm/page_alloc.c
--- a/mm/page_alloc.c~mm-drain-percpu-lru-add-rotate-page-vectors-on-cpu-hot-unplug
+++ a/mm/page_alloc.c
@@ -4825,6 +4825,7 @@ static int page_alloc_cpu_notify(struct
int cpu = (unsigned long)hcpu;
if (action == CPU_DEAD || action == CPU_DEAD_FROZEN) {
+ lru_add_drain_cpu(cpu);
drain_pages(cpu);
/*
diff -puN mm/swap.c~mm-drain-percpu-lru-add-rotate-page-vectors-on-cpu-hot-unplug mm/swap.c
--- a/mm/swap.c~mm-drain-percpu-lru-add-rotate-page-vectors-on-cpu-hot-unplug
+++ a/mm/swap.c
@@ -496,7 +496,7 @@ static void lru_deactivate_fn(struct pag
* Either "cpu" is the current CPU, and preemption has already been
* disabled; or "cpu" is being hot-unplugged, and is already dead.
*/
-static void drain_cpu_pagevecs(int cpu)
+void lru_add_drain_cpu(int cpu)
{
struct pagevec *pvecs = per_cpu(lru_add_pvecs, cpu);
struct pagevec *pvec;
@@ -553,7 +553,7 @@ void deactivate_page(struct page *page)
void lru_add_drain(void)
{
- drain_cpu_pagevecs(get_cpu());
+ lru_add_drain_cpu(get_cpu());
put_cpu();
}
_
Subject: Subject: mm: drain percpu lru add/rotate page-vectors on cpu hot-unplug
Patches currently in -mm which might be from khlebnikov@xxxxxxxxxx are
linux-next.patch
mm-add-rss-counters-consistency-check.patch
mm-make-get_mm_counter-static-inline.patch
mm-replace-page_migration-with-is_enabledconfig_migration.patch
mm-drain-percpu-lru-add-rotate-page-vectors-on-cpu-hot-unplug.patch
mm-fix-page-faults-detection-in-swap-token-logic.patch
memcg-kill-dead-prev_priority-stubs.patch
--
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