diff options
| author | Gerald Schaefer <gerald.schaefer@de.ibm.com> | 2008-07-23 21:28:22 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-24 10:47:21 -0700 |
| commit | 83d1674a946141c3c59d430e96c224f7937e6158 (patch) | |
| tree | 03420c9fdf56ad35de685b7c0b48899d886bd7ff /mm/Kconfig | |
| parent | 9ca908f47bc784c90e17a553ce33e756c73feac4 (diff) | |
| download | lwn-83d1674a946141c3c59d430e96c224f7937e6158.tar.gz lwn-83d1674a946141c3c59d430e96c224f7937e6158.zip | |
mm: make CONFIG_MIGRATION available w/o CONFIG_NUMA
We'd like to support CONFIG_MEMORY_HOTREMOVE on s390, which depends on
CONFIG_MIGRATION. So far, CONFIG_MIGRATION is only available with NUMA
support.
This patch makes CONFIG_MIGRATION selectable for architectures that define
ARCH_ENABLE_MEMORY_HOTREMOVE. When MIGRATION is enabled w/o NUMA, the
kernel won't compile because migrate_vmas() does not know about
vm_ops->migrate() and vma_migratable() does not know about policy_zone.
To fix this, those two functions can be restricted to '#ifdef CONFIG_NUMA'
because they are not being used w/o NUMA. vma_migratable() is moved over
from migrate.h to mempolicy.h.
[kosaki.motohiro@jp.fujitsu.com: build fix]
Acked-by: Christoph Lameter <cl@linux-foundation.org>
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: KOSAKI Motorhiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/Kconfig')
| -rw-r--r-- | mm/Kconfig | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/Kconfig b/mm/Kconfig index c4de85285bb4..aa799007a11b 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -174,7 +174,7 @@ config SPLIT_PTLOCK_CPUS config MIGRATION bool "Page migration" def_bool y - depends on NUMA + depends on NUMA || ARCH_ENABLE_MEMORY_HOTREMOVE help Allows the migration of the physical location of pages of processes while the virtual addresses are not changed. This is useful for |