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Badari Pulavarty 5c755e9fd8 memory-hotplug: add sysfs removable attribute for hotplug memory remove ... Memory may be hot-removed on a per-memory-block basis, particularly on POWER where the SPARSEMEM section size often matches the memory-block size. A user-level agent must be able to identify which sections of memory are likely to be removable before attempting the potentially expensive operation. This patch adds a file called "removable" to the memory directory in sysfs to help such an agent. In this patch, a memory block is considered removable if; o It contains only MOVABLE pageblocks o It contains only pageblocks with free pages regardless of pageblock type On the other hand, a memory block starting with a PageReserved() page will never be considered removable. Without this patch, the user-agent is forced to choose a memory block to remove randomly. Sample output of the sysfs files: ./memory/memory0/removable: 0 ./memory/memory1/removable: 0 ./memory/memory2/removable: 0 ./memory/memory3/removable: 0 ./memory/memory4/removable: 0 ./memory/memory5/removable: 0 ./memory/memory6/removable: 0 ./memory/memory7/removable: 1 ./memory/memory8/removable: 0 ./memory/memory9/removable: 0 ./memory/memory10/removable: 0 ./memory/memory11/removable: 0 ./memory/memory12/removable: 0 ./memory/memory13/removable: 0 ./memory/memory14/removable: 0 ./memory/memory15/removable: 0 ./memory/memory16/removable: 0 ./memory/memory17/removable: 1 ./memory/memory18/removable: 1 ./memory/memory19/removable: 1 ./memory/memory20/removable: 1 ./memory/memory21/removable: 1 ./memory/memory22/removable: 1 Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com> Signed-off-by: Mel Gorman <mel@csn.ul.ie> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		17 years ago
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power	driver core: fix a lot of printk usages of bus_id	17 years ago
Kconfig	always enable FW_LOADER unless EMBEDDED=y	17 years ago
Makefile	Merge branch 'dmapool' of git://git.kernel.org/pub/scm/linux/kernel/git/willy/misc	17 years ago
attribute_container.c	SCSI: convert struct class_device to struct device	17 years ago
base.h	class: change internal semaphore to a mutex	17 years ago
bus.c	bus_remove_device: be more careful about incomplete initialization	17 years ago
class.c	class: change internal semaphore to a mutex	17 years ago
core.c	driver core: Suppress sysfs warnings for device_rename().	17 years ago
cpu.c	Merge branch 'cpus4096-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	17 years ago
dd.c	driver core: replace remaining __FUNCTION__ occurrences	17 years ago
devres.c	…
dma-mapping.c	…
driver.c	driver core: warn about duplicate driver names on the same bus	17 years ago
firmware.c	firmware: change firmware_kset to firmware_kobj	17 years ago
firmware_class.c	firmware: allow firmware files to be built into kernel image	17 years ago
hypervisor.c	kobject: convert /sys/hypervisor to use kobject_create	17 years ago
init.c	Driver core: coding style fixes	17 years ago
isa.c	…
map.c	…
memory.c	memory-hotplug: add sysfs removable attribute for hotplug memory remove	17 years ago
module.c	Driver core: move the static kobject out of struct driver	17 years ago
node.c	sysdev: Pass the attribute to the low level sysdev show/store function	17 years ago
platform.c	Implement new suspend and hibernation callbacks for platform busses	17 years ago
sys.c	sysdev: Add utility functions for simple int/ulong variable sysdev attributes	17 years ago
topology.c	sysdev: Pass the attribute to the low level sysdev show/store function	17 years ago
transport_class.c	SCSI: convert struct class_device to struct device	17 years ago