diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/mempolicy.c | 28 |
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; |