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[PATCH] page migration reorg

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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 <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Christoph Lameter 2006-03-22 00:09:12 -08:00 • committed by Linus Torvalds
commit b20a35035f
10 changed files with 741 additions and 660 deletions
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6
mm/Kconfig
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@ -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.