From 56bbd65df0e92a4a8eb70c5f2b416ae2b6c5fb31 Mon Sep 17 00:00:00 2001 From: Christoph Lameter Date: Tue, 16 Oct 2007 01:25:35 -0700 Subject: 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 Acked-by: Nishanth Aravamudan Tested-by: Lee Schermerhorn Acked-by: Bob Picco Cc: KAMEZAWA Hiroyuki Cc: Mel Gorman Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/migrate.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'mm/migrate.c') diff --git a/mm/migrate.c b/mm/migrate.c index 07f22d4a431..71c38b43c01 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -986,7 +986,7 @@ asmlinkage long sys_move_pages(pid_t pid, unsigned long nr_pages, goto out; err = -ENODEV; - if (!node_online(node)) + if (!node_state(node, N_HIGH_MEMORY)) goto out; err = -EACCES; -- cgit v1.2.3