Yasuaki Ishimatsu 3464046824 numa, cpu hotplug: change links of CPU and node when changing node number by onlining CPU ... When booting x86 system contains memoryless node, node numbers of CPUs on memoryless node were changed to nearest online node number by init_cpu_to_node() because the node is not online. In my system, node numbers of cpu#30-44 and 75-89 were changed from 2 to 0 as follows: $ numactl --hardware available: 2 nodes (0-1) node 0 cpus: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 node 0 size: 32394 MB node 0 free: 27898 MB node 1 cpus: 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 node 1 size: 32768 MB node 1 free: 30335 MB If we hot add memory to memoryless node and offine/online all CPUs on the node, node numbers of these CPUs are changed to correct node numbers by srat_detect_node() because the node become online. In this case, node numbers of cpu#30-44 and 75-89 were changed from 0 to 2 in my system as follows: $ numactl --hardware available: 3 nodes (0-2) node 0 cpus: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 node 0 size: 32394 MB node 0 free: 27218 MB node 1 cpus: 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 node 1 size: 32768 MB node 1 free: 30014 MB node 2 cpus: 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 node 2 size: 16384 MB node 2 free: 16384 MB But "cpu to node" and "node to cpu" links were not changed as follows: $ ls /sys/devices/system/cpu/cpu30/|grep node node0 $ ls /sys/devices/system/node/node0/|grep cpu30 cpu30 "numactl --hardware" shows that cpu30 belongs to node 2. But sysfs links does not change. This patch changes "cpu to node" and "node to cpu" links when node number changed by onlining CPU. Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Cc: KOSAKI Motohiro <kosaki.motohiro@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: "Srivatsa S. Bhat" <srivatsa.bhat@linux.vnet.ibm.com> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2013-04-29 15:54:39 -07:00
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power	PM / QoS: Avoid possible deadlock related to sysfs access	2013-04-02 01:25:24 +02:00
regmap	regmap: Back out work buffer fix	2013-04-09 18:03:25 +01:00
attribute_container.c	drivers: base: Convert dev_printk(KERN_<LEVEL> to dev_<level>(	2012-10-30 17:38:43 -07:00
base.h	driver core: move the deferred probe pointer into the private area	2012-03-08 12:17:22 -08:00
bus.c	device: separate all subsys mutexes	2013-03-13 08:48:28 -07:00
class.c	driver-core: constify data for class_find_device()	2013-02-06 12:18:56 -08:00
core.c	driver core: handle user namespaces properly with the uid/gid devtmpfs change	2013-04-11 11:43:29 -07:00
cpu.c	numa, cpu hotplug: change links of CPU and node when changing node number by onlining CPU	2013-04-29 15:54:39 -07:00
dd.c	PM / Runtime: Idle devices asynchronously after probe|release	2013-04-11 12:42:52 -07:00
devres.c	drivers: base: Convert dev_printk(KERN_<LEVEL> to dev_<level>(	2012-10-30 17:38:43 -07:00
devtmpfs.c	driver core: handle user namespaces properly with the uid/gid devtmpfs change	2013-04-11 11:43:29 -07:00
dma-buf.c	CHROMIUM: dma-buf: restore args on failure of dma_buf_mmap	2013-02-27 15:14:02 +05:30
dma-coherent.c	drivers: dma-coherent: Fix typo in dma_mmap_from_coherent documentation	2012-10-23 14:05:32 +02:00
dma-contiguous.c	drivers: cma: represent physical addresses as phys_addr_t	2012-12-11 09:28:09 +01:00
dma-mapping.c	[media] dma-mapping: fix dma_common_get_sgtable() conditional compilation	2012-11-27 09:42:31 -02:00
driver.c	driver core: don't trigger uevent after failure	2012-07-17 10:40:23 -07:00
firmware_class.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2013-02-26 20:16:07 -08:00
firmware.c
hypervisor.c	drivers/base: Add export.h for EXPORT_SYMBOL/THIS_MODULE as required.	2011-10-31 19:31:38 -04:00
init.c	driver-core: implement 'sysdev' functionality for regular devices and buses	2011-12-14 14:29:38 -08:00
isa.c
Kconfig	firmware: Make user-mode helper optional	2013-02-03 17:57:40 -08:00
Makefile	drivers/pinctrl: grab default handles from device core	2013-01-23 16:39:51 +01:00
map.c
memory.c	mm: Remove unused parameter of pages_correctly_reserved()	2013-04-29 15:54:38 -07:00
module.c
node.c	drivers/base/node.c: switch to register_hotmemory_notifier()	2013-04-29 15:54:36 -07:00
pinctrl.c	drivers/pinctrl: grab default handles from device core	2013-01-23 16:39:51 +01:00
platform.c	driver core: platform.c: fix checkpatch errors and warnings	2013-03-29 09:10:55 -07:00
soc.c	mode_t whack-a-mole: ->is_visible() returns umode_t...	2012-05-29 23:28:42 -04:00
syscore.c	PM: Reintroduce dropped call to check_wakeup_irqs	2011-07-11 10:51:49 +02:00
topology.c	cpu: convert 'cpu' and 'machinecheck' sysdev_class to a regular subsystem	2011-12-21 14:29:42 -08:00
transport_class.c	drivers/base: transport_class explicitly requires EXPORT_SYMBOL	2011-10-31 19:31:15 -04:00