From: Antigen_SEAXCH01@emc.com
To: akpm@linux-foundation.org
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
minchan@kernel.org, kamezawa.hiroyu@jp.fujitsu.com,
isimatu.yasuaki@jp.fujitsu.com, wency@cn.fujitsu.com,
shli@fusionio.com
Subject: Antigen forwarded attachment
Date: Wed, 19 Sep 2012 12:08:13 -0700 [thread overview]
Message-ID: <SEAXCH01zu23LiC1h1j004021a3@seaxch01.isilon.com> (raw)
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The body from the message "[PATCH] memory-hotplug: fix zone stat mismatch", originally sent to you by linux-kernel-owner@vger.kernel.org (linux-kernel-owner@vger.kernel.org), has been forwarded to you from the Antigen Quarantine area.
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<<Body of Message>>
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During memory-hotplug stress test, I found NR_ISOLATED_[ANON|FILE]
are increasing so that kernel are hang out.
The cause is that when we do memory-hotadd after memory-remove,
__zone_pcp_update clear out zone's ZONE_STAT_ITEMS in setup_pageset
without draining vm_stat_diff of all CPU.
This patch fixes it.
Cc: Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Cc: Wen Congyang <wency@cn.fujitsu.com>
Cc: Shaohua Li <shli@fusionio.com>
Signed-off-by: Minchan Kim <minchan@kernel.org>
---
Andrew, I think it's a candidate of stable but didn't Cced
stable.
Please send this patch to stable if reviewer couldn't find
any fault when you merge.
Thanks.
include/linux/vmstat.h | 4 ++++
mm/page_alloc.c | 1 +
mm/vmstat.c | 12 ++++++++++++
3 files changed, 17 insertions(+)
diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h
index ad2cfd5..5d31876 100644
--- a/include/linux/vmstat.h
+++ b/include/linux/vmstat.h
@@ -198,6 +198,8 @@ extern void __dec_zone_state(struct zone *, enum zone_stat_item);
void refresh_cpu_vm_stats(int);
void refresh_zone_stat_thresholds(void);
+void drain_zonestat(struct zone *zone, struct per_cpu_pageset *);
+
int calculate_pressure_threshold(struct zone *zone);
int calculate_normal_threshold(struct zone *zone);
void set_pgdat_percpu_threshold(pg_data_t *pgdat,
@@ -251,6 +253,8 @@ static inline void __dec_zone_page_state(struct page *page,
static inline void refresh_cpu_vm_stats(int cpu) { }
static inline void refresh_zone_stat_thresholds(void) { }
+static inline void drain_zonestat(struct zone *zone,
+ struct per_cpu_pageset *pset) { }
#endif /* CONFIG_SMP */
extern const char * const vmstat_text[];
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index ab58346..5d005c8 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5904,6 +5904,7 @@ static int __meminit __zone_pcp_update(void *data)
local_irq_save(flags);
if (pcp->count > 0)
free_pcppages_bulk(zone, pcp->count, pcp);
+ drain_zonestat(zone, pset);
setup_pageset(pset, batch);
local_irq_restore(flags);
}
diff --git a/mm/vmstat.c b/mm/vmstat.c
index b3e3b9d..d4cc1c2 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -495,6 +495,18 @@ void refresh_cpu_vm_stats(int cpu)
atomic_long_add(global_diff[i], &vm_stat[i]);
}
+void drain_zonestat(struct zone *zone, struct per_cpu_pageset *pset)
+{
+ int i;
+
+ for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++)
+ if (pset->vm_stat_diff[i]) {
+ int v = pset->vm_stat_diff[i];
+ pset->vm_stat_diff[i] = 0;
+ atomic_long_add(v, &zone->vm_stat[i]);
+ atomic_long_add(v, &vm_stat[i]);
+ }
+}
#endif
#ifdef CONFIG_NUMA
--
1.7.9.5
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next reply other threads:[~2012-09-19 19:11 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-19 19:08 Antigen_SEAXCH01 [this message]
-- strict thread matches above, loose matches on Subject: below --
2012-09-19 18:51 Antigen forwarded attachment Antigen_SEAXCH01
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