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Memoryless nodes: Add N_CPU node state 

We need the check for a node with cpu in zone reclaim.  Zone reclaim will not
allow remote zone reclaim if a node has a cpu.

[Lee.Schermerhorn@hp.com: Move setup of N_CPU node state mask]
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Tested-by:  Lee Schermerhorn <lee.schermerhorn@hp.com>
Acked-by: Bob Picco <bob.picco@hp.com>
Cc: Nishanth Aravamudan <nacc@us.ibm.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Mel Gorman <mel@skynet.ie>
Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.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 2007-10-16 01:25:36 -07:00 committed by Linus Torvalds
parent 56bbd65df0
commit 37c0708dbe
3 changed files with 6 additions and 4 deletions
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1
include/linux/nodemask.h
View File

@ -349,6 +349,7 @@ enum node_states {
#else
N_HIGH_MEMORY = N_NORMAL_MEMORY,
#endif
N_CPU, /* The node has one or more cpus */
NR_NODE_STATES
};

5
mm/page_alloc.c
View File

@ -2353,6 +2353,9 @@ static struct per_cpu_pageset boot_pageset[NR_CPUS];
static int __cpuinit process_zones(int cpu)
{
struct zone *zone, *dzone;
int node = cpu_to_node(cpu);
node_set_state(node, N_CPU); /* this node has a cpu */
for_each_zone(zone) {
@ -2360,7 +2363,7 @@ static int __cpuinit process_zones(int cpu)
continue;
zone_pcp(zone, cpu) = kmalloc_node(sizeof(struct per_cpu_pageset),
GFP_KERNEL, cpu_to_node(cpu));
GFP_KERNEL, node);
if (!zone_pcp(zone, cpu))
goto bad;

4
mm/vmscan.c
View File

@ -1853,7 +1853,6 @@ static int __zone_reclaim(struct zone *zone, gfp_t gfp_mask, unsigned int order)
int zone_reclaim(struct zone *zone, gfp_t gfp_mask, unsigned int order)
{
cpumask_t mask;
int node_id;
/*
@ -1890,8 +1889,7 @@ int zone_reclaim(struct zone *zone, gfp_t gfp_mask, unsigned int order)
* as wide as possible.
*/
node_id = zone_to_nid(zone);
mask = node_to_cpumask(node_id);
if (!cpus_empty(mask) && node_id != numa_node_id())
if (node_state(node_id, N_CPU) && node_id != numa_node_id())
return 0;
return __zone_reclaim(zone, gfp_mask, order);
}