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[PATCH] Replace highest_possible_node_id() with nr_node_ids

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highest_possible_node_id() is currently used to calculate the last possible
node idso that the network subsystem can figure out how to size per node
arrays.

I think having the ability to determine the maximum amount of nodes in a
system at runtime is useful but then we should name this entry
correspondingly, it should return the number of node_ids, and the the value
needs to be setup only once on bootup.  The node_possible_map does not
change after bootup.

This patch introduces nr_node_ids and replaces the use of
highest_possible_node_id().  nr_node_ids is calculated on bootup when the
page allocators pagesets are initialized.

[deweerdt@free.fr: fix oops]
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Cc: Neil Brown <neilb@suse.de>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Signed-off-by: Frederik Deweerdt <frederik.deweerdt@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Christoph Lameter 2007-02-20 13:57:51 -08:00 • committed by Linus Torvalds
parent 5ec553a904
commit 74c7aa8b85
3 changed files with 25 additions and 18 deletions
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4
include/linux/nodemask.h
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@ -352,7 +352,7 @@ extern nodemask_t node_possible_map;
#define node_possible(node) node_isset((node), node_possible_map)
#define first_online_node first_node(node_online_map)
#define next_online_node(nid) next_node((nid), node_online_map)
int highest_possible_node_id(void);
extern int nr_node_ids;
#else
#define num_online_nodes() 1
#define num_possible_nodes() 1
@ -360,7 +360,7 @@ int highest_possible_node_id(void);
#define node_possible(node) ((node) == 0)
#define first_online_node 0
#define next_online_node(nid) (MAX_NUMNODES)
#define highest_possible_node_id() 0
#define nr_node_ids 1
#endif
#define any_online_node(mask) \