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authorChristoph Lameter <clameter@sgi.com>2006-03-22 00:09:12 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-22 07:54:06 -0800
commitb20a35035f983f4ac7e29c4a68f30e43510007e0 (patch)
treefdf090ddddbcc275349f62f71adc98649e2c683b /mm/Kconfig
parent442295c94bf650221af3ef20fc68fa3e93876818 (diff)
[PATCH] page migration reorg
Centralize the page migration functions in anticipation of additional tinkering. Creates a new file mm/migrate.c 1. Extract buffer_migrate_page() from fs/buffer.c 2. Extract central migration code from vmscan.c 3. Extract some components from mempolicy.c 4. Export pageout() and remove_from_swap() from vmscan.c 5. Make it possible to configure NUMA systems without page migration and non-NUMA systems with page migration. I had to so some #ifdeffing in mempolicy.c that may need a cleanup. Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm/Kconfig')
-rw-r--r--mm/Kconfig6
1 files changed, 6 insertions, 0 deletions
diff --git a/mm/Kconfig b/mm/Kconfig
index a9cb80ae640..bd80460360d 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -137,5 +137,11 @@ config SPLIT_PTLOCK_CPUS
# support for page migration
#
config MIGRATION
+ bool "Page migration"
def_bool y if NUMA || SPARSEMEM || DISCONTIGMEM
depends on SWAP
+ help
+ Allows the migration of the physical location of pages of processes
+ while the virtual addresses are not changed. This is useful for
+ example on NUMA systems to put pages nearer to the processors accessing
+ the page.