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-rw-r--r--mm/mempolicy.c28
1 files changed, 18 insertions, 10 deletions
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index fea4a5da6e44..7b3ae977b158 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -645,11 +645,9 @@ static void get_policy_nodemask(struct mempolicy *p, nodemask_t *nodes)
*nodes = p->v.nodes;
break;
case MPOL_PREFERRED:
- /* or use current node instead of memory_map? */
- if (p->v.preferred_node < 0)
- *nodes = node_states[N_HIGH_MEMORY];
- else
+ if (p->v.preferred_node >= 0)
node_set(p->v.preferred_node, *nodes);
+ /* else return empty node mask for local allocation */
break;
default:
BUG();
@@ -804,7 +802,7 @@ int do_migrate_pages(struct mm_struct *mm,
int err = 0;
nodemask_t tmp;
- down_read(&mm->mmap_sem);
+ down_read(&mm->mmap_sem);
err = migrate_vmas(mm, from_nodes, to_nodes, flags);
if (err)
@@ -1948,10 +1946,12 @@ void numa_default_policy(void)
}
/*
- * Display pages allocated per node and memory policy via /proc.
+ * "local" is pseudo-policy: MPOL_PREFERRED with preferred_node == -1
+ * Used only for mpol_to_str()
*/
+#define MPOL_LOCAL (MPOL_INTERLEAVE + 1)
static const char * const policy_types[] =
- { "default", "prefer", "bind", "interleave" };
+ { "default", "prefer", "bind", "interleave", "local" };
/*
* Convert a mempolicy into a string.
@@ -1962,6 +1962,7 @@ static inline int mpol_to_str(char *buffer, int maxlen, struct mempolicy *pol)
{
char *p = buffer;
int l;
+ int nid;
nodemask_t nodes;
unsigned short mode;
unsigned short flags = pol ? pol->flags : 0;
@@ -1978,7 +1979,11 @@ static inline int mpol_to_str(char *buffer, int maxlen, struct mempolicy *pol)
case MPOL_PREFERRED:
nodes_clear(nodes);
- node_set(pol->v.preferred_node, nodes);
+ nid = pol->v.preferred_node;
+ if (nid < 0)
+ mode = MPOL_LOCAL; /* pseudo-policy */
+ else
+ node_set(nid, nodes);
break;
case MPOL_BIND:
@@ -1993,8 +1998,8 @@ static inline int mpol_to_str(char *buffer, int maxlen, struct mempolicy *pol)
}
l = strlen(policy_types[mode]);
- if (buffer + maxlen < p + l + 1)
- return -ENOSPC;
+ if (buffer + maxlen < p + l + 1)
+ return -ENOSPC;
strcpy(p, policy_types[mode]);
p += l;
@@ -2093,6 +2098,9 @@ static inline void check_huge_range(struct vm_area_struct *vma,
}
#endif
+/*
+ * Display pages allocated per node and memory policy via /proc.
+ */
int show_numa_map(struct seq_file *m, void *v)
{
struct proc_maps_private *priv = m->private;