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| author | Christoph Lameter <clameter@sgi.com> | 2007-10-16 01:25:38 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-16 09:42:59 -0700 |
| commit | 0e1e7c7a739562a321fda07c7cd2a97a7114f8f8 (patch) | |
| tree | f2148e5b667152681625c19cf8b2a556500994ea /include | |
| parent | 523b945855a1427000ffc707c610abe5947ae607 (diff) | |
| download | op-kernel-dev-0e1e7c7a739562a321fda07c7cd2a97a7114f8f8.zip op-kernel-dev-0e1e7c7a739562a321fda07c7cd2a97a7114f8f8.tar.gz | |
Memoryless nodes: Use N_HIGH_MEMORY for cpusets
cpusets try to ensure that any node added to a cpuset's mems_allowed is
on-line and contains memory. The assumption was that online nodes contained
memory. Thus, it is possible to add memoryless nodes to a cpuset and then add
tasks to this cpuset. This results in continuous series of oom-kill and
apparent system hang.
Change cpusets to use node_states[N_HIGH_MEMORY] [a.k.a. node_memory_map] in
place of node_online_map when vetting memories. Return error if admin
attempts to write a non-empty mems_allowed node mask containing only
memoryless-nodes.
Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com>
Signed-off-by: Bob Picco <bob.picco@hp.com>
Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Mel Gorman <mel@skynet.ie>
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/cpuset.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/cpuset.h b/include/linux/cpuset.h index 826b15e..9e633ea 100644 --- a/include/linux/cpuset.h +++ b/include/linux/cpuset.h @@ -93,7 +93,7 @@ static inline nodemask_t cpuset_mems_allowed(struct task_struct *p) return node_possible_map; } -#define cpuset_current_mems_allowed (node_online_map) +#define cpuset_current_mems_allowed (node_states[N_HIGH_MEMORY]) static inline void cpuset_init_current_mems_allowed(void) {} static inline void cpuset_update_task_memory_state(void) {} #define cpuset_nodes_subset_current_mems_allowed(nodes) (1) |
