Subject: + mm-clear-n_cpu-from-node_states-at-cpu-offline.patch added to -mm tree
To: toshi.kani@xxxxxx,cl@xxxxxxxxx,isimatu.yasuaki@xxxxxxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Tue, 15 Oct 2013 14:44:06 -0700
The patch titled
Subject: mm: clear N_CPU from node_states at CPU offline
has been added to the -mm tree. Its filename is
mm-clear-n_cpu-from-node_states-at-cpu-offline.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-clear-n_cpu-from-node_states-at-cpu-offline.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-clear-n_cpu-from-node_states-at-cpu-offline.patch
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------------------------------------------------------
From: Toshi Kani <toshi.kani@xxxxxx>
Subject: mm: clear N_CPU from node_states at CPU offline
vmstat_cpuup_callback() is a CPU notifier callback, which marks N_CPU to a
node at CPU online event. However, it does not update this N_CPU info at
CPU offline event.
Changed vmstat_cpuup_callback() to clear N_CPU when the last CPU in the
node is put into offline, i.e. the node no longer has any online CPU.
Signed-off-by: Toshi Kani <toshi.kani@xxxxxx>
Acked-by: Christoph Lameter <cl@xxxxxxxxx>
Cc: Yasuaki Ishimatsu <isimatu.yasuaki@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/vmstat.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff -puN mm/vmstat.c~mm-clear-n_cpu-from-node_states-at-cpu-offline mm/vmstat.c
--- a/mm/vmstat.c~mm-clear-n_cpu-from-node_states-at-cpu-offline
+++ a/mm/vmstat.c
@@ -1229,6 +1229,20 @@ static void start_cpu_timer(int cpu)
schedule_delayed_work_on(cpu, work, __round_jiffies_relative(HZ, cpu));
}
+static void vmstat_cpu_dead(int node)
+{
+ int cpu;
+
+ get_online_cpus();
+ for_each_online_cpu(cpu)
+ if (cpu_to_node(cpu) == node)
+ goto end;
+
+ node_clear_state(node, N_CPU);
+end:
+ put_online_cpus();
+}
+
/*
* Use the cpu notifier to insure that the thresholds are recalculated
* when necessary.
@@ -1258,6 +1272,7 @@ static int vmstat_cpuup_callback(struct
case CPU_DEAD:
case CPU_DEAD_FROZEN:
refresh_zone_stat_thresholds();
+ vmstat_cpu_dead(cpu_to_node(cpu));
break;
default:
break;
_
Patches currently in -mm which might be from toshi.kani@xxxxxx are
cpu-mem-hotplug-add-try_online_node-for-cpu_up.patch
mm-sparsemem-use-pages_per_section-to-remove-redundant-nr_pages-parameter.patch
mm-sparsemem-fix-a-bug-in-free_map_bootmem-when-config_sparsemem_vmemmap.patch
mm-sparsemem-fix-a-bug-in-free_map_bootmem-when-config_sparsemem_vmemmap-v2.patch
memblock-factor-out-of-top-down-allocation.patch
memblock-introduce-bottom-up-allocation-mode.patch
x86-mm-factor-out-of-top-down-direct-mapping-setup.patch
x86-mem-hotplug-support-initialize-page-tables-in-bottom-up.patch
x86-acpi-crash-kdump-do-reserve_crashkernel-after-srat-is-parsed.patch
mem-hotplug-introduce-movable_node-boot-option.patch
mm-set-n_cpu-to-node_states-during-boot.patch
mm-clear-n_cpu-from-node_states-at-cpu-offline.patch
linux-next.patch
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