Subject: + mm-set-n_cpu-to-node_states-during-boot.patch added to -mm tree
To: toshi.kani@xxxxxx,cl@xxxxxxxxx,isimatu.yasuaki@xxxxxxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Tue, 15 Oct 2013 14:44:05 -0700
The patch titled
Subject: mm: set N_CPU to node_states during boot
has been added to the -mm tree. Its filename is
mm-set-n_cpu-to-node_states-during-boot.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-set-n_cpu-to-node_states-during-boot.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-set-n_cpu-to-node_states-during-boot.patch
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From: Toshi Kani <toshi.kani@xxxxxx>
Subject: mm: set N_CPU to node_states during boot
After a system booted, N_CPU is not set to any node as has_cpu shows an
empty line.
# cat /sys/devices/system/node/has_cpu
(show-empty-line)
setup_vmstat() registers its CPU notifier callback,
vmstat_cpuup_callback(), which marks N_CPU to a node when a CPU is put
into online. However, setup_vmstat() is called after all CPUs are
launched in the boot sequence.
Changed setup_vmstat() to mark N_CPU to the nodes with online CPUs at
boot, which is consistent with other operations in
vmstat_cpuup_callback(), i.e. start_cpu_timer() and
refresh_zone_stat_thresholds().
Also added get_online_cpus() to protect the for_each_online_cpu() loop.
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 | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff -puN mm/vmstat.c~mm-set-n_cpu-to-node_states-during-boot mm/vmstat.c
--- a/mm/vmstat.c~mm-set-n_cpu-to-node_states-during-boot
+++ a/mm/vmstat.c
@@ -1276,8 +1276,12 @@ static int __init setup_vmstat(void)
register_cpu_notifier(&vmstat_notifier);
- for_each_online_cpu(cpu)
+ get_online_cpus();
+ for_each_online_cpu(cpu) {
start_cpu_timer(cpu);
+ node_set_state(cpu_to_node(cpu), N_CPU);
+ }
+ put_online_cpus();
#endif
#ifdef CONFIG_PROC_FS
proc_create("buddyinfo", S_IRUGO, NULL, &fragmentation_file_operations);
_
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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