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Zhang Zhen ed2f240094 memory-hotplug: add sysfs valid_zones attribute 
Currently memory-hotplug has two limits:

1. If the memory block is in ZONE_NORMAL, you can change it to
   ZONE_MOVABLE, but this memory block must be adjacent to ZONE_MOVABLE.

2. If the memory block is in ZONE_MOVABLE, you can change it to
   ZONE_NORMAL, but this memory block must be adjacent to ZONE_NORMAL.

With this patch, we can easy to know a memory block can be onlined to
which zone, and don't need to know the above two limits.

Updated the related Documentation.

[akpm@linux-foundation.org: use conventional comment layout]
[akpm@linux-foundation.org: fix build with CONFIG_MEMORY_HOTREMOVE=n]
[akpm@linux-foundation.org: remove unused local zone_prev]
Signed-off-by: Zhang Zhen <zhenzhang.zhang@huawei.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Toshi Kani <toshi.kani@hp.com>
Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Wang Nan <wangnan0@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2014-10-09 22:25:52 -04:00
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ABI memory-hotplug: add sysfs valid_zones attribute 2014-10-09 22:25:52 -04:00
DocBook USB patches for 3.18-rc1 2014-10-08 06:47:31 -04:00
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devicetree Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-10-09 06:42:04 -04:00
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timers Documentation: update .gitignore files 2014-09-26 11:02:59 +02:00
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usb usb: hub: rename khubd to hub_wq in documentation and comments 2014-09-23 22:33:19 -07:00
vDSO Documentation: disable vdso_test to avoid breakage with old glibc 2014-09-26 11:03:00 +02:00
video4linux Documentation: update .gitignore files 2014-09-26 11:02:59 +02:00
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Changes Documentation: remove obsolete pcmcia-cs from Changes 2014-09-09 10:35:58 +02:00
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DMA-API-HOWTO.txt Documentation: correct parameter error for dma_mapping_error 2014-09-26 11:22:29 +02:00
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Makefile Documentation: add makefiles for more targets 2014-09-26 11:02:56 +02:00
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kernel-parameters.txt mm/slab_common: commonize slab merge logic 2014-10-09 22:25:51 -04:00
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memory-hotplug.txt memory-hotplug: add sysfs valid_zones attribute 2014-10-09 22:25:52 -04:00
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sysfs-rules.txt Documentation/sysfs-rules.txt: Add device attribute error code documentation 2014-09-19 14:44:51 -07:00
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