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| H A D | mempolicy.c | diff 56bbd65df0e92a4a8eb70c5f2b416ae2b6c5fb31 Tue Oct 16 03:25:35 CDT 2007 Christoph Lameter <clameter@sgi.com> Memoryless nodes: Update memory policy and page migration
Online nodes now may have no memory. The checks and initialization must
therefore be changed to no longer use the online functions.
This will correctly initialize the interleave on bootup to only target nodes
with memory and will make sys_move_pages return an error when a page is to be
moved to a memoryless node. Similarly we will get an error if MPOL_BIND and
MPOL_INTERLEAVE is used on a memoryless node.
These are somewhat new semantics. So far one could specify memoryless nodes
and we would maybe do the right thing and just ignore the node (or we'd do
something strange like with MPOL_INTERLEAVE). If we want to allow the
specification of memoryless nodes via memory policies then we need to keep
checking for online nodes.
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Acked-by: Nishanth Aravamudan <nacc@us.ibm.com>
Tested-by: Lee Schermerhorn <lee.schermerhorn@hp.com>
Acked-by: Bob Picco <bob.picco@hp.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Mel Gorman <mel@skynet.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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| H A D | migrate.c | diff 56bbd65df0e92a4a8eb70c5f2b416ae2b6c5fb31 Tue Oct 16 03:25:35 CDT 2007 Christoph Lameter <clameter@sgi.com> Memoryless nodes: Update memory policy and page migration
Online nodes now may have no memory. The checks and initialization must
therefore be changed to no longer use the online functions.
This will correctly initialize the interleave on bootup to only target nodes
with memory and will make sys_move_pages return an error when a page is to be
moved to a memoryless node. Similarly we will get an error if MPOL_BIND and
MPOL_INTERLEAVE is used on a memoryless node.
These are somewhat new semantics. So far one could specify memoryless nodes
and we would maybe do the right thing and just ignore the node (or we'd do
something strange like with MPOL_INTERLEAVE). If we want to allow the
specification of memoryless nodes via memory policies then we need to keep
checking for online nodes.
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Acked-by: Nishanth Aravamudan <nacc@us.ibm.com>
Tested-by: Lee Schermerhorn <lee.schermerhorn@hp.com>
Acked-by: Bob Picco <bob.picco@hp.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Mel Gorman <mel@skynet.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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