diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/mempolicy.c | 47 |
1 files changed, 22 insertions, 25 deletions
diff --git a/mm/mempolicy.c b/mm/mempolicy.c index 7b3ae977b158..143b019e9834 100644 --- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -110,7 +110,7 @@ enum zone_type policy_zone = 0; struct mempolicy default_policy = { .refcnt = ATOMIC_INIT(1), /* never free it */ .mode = MPOL_PREFERRED, - .v = { .preferred_node = -1 }, + .flags = MPOL_F_LOCAL, }; static const struct mempolicy_operations { @@ -163,7 +163,7 @@ static int mpol_new_interleave(struct mempolicy *pol, const nodemask_t *nodes) static int mpol_new_preferred(struct mempolicy *pol, const nodemask_t *nodes) { if (!nodes) - pol->v.preferred_node = -1; /* local allocation */ + pol->flags |= MPOL_F_LOCAL; /* local allocation */ else if (nodes_empty(*nodes)) return -EINVAL; /* no allowed nodes */ else @@ -290,14 +290,15 @@ static void mpol_rebind_preferred(struct mempolicy *pol, if (pol->flags & MPOL_F_STATIC_NODES) { int node = first_node(pol->w.user_nodemask); - if (node_isset(node, *nodes)) + if (node_isset(node, *nodes)) { pol->v.preferred_node = node; - else - pol->v.preferred_node = -1; + pol->flags &= ~MPOL_F_LOCAL; + } else + pol->flags |= MPOL_F_LOCAL; } else if (pol->flags & MPOL_F_RELATIVE_NODES) { mpol_relative_nodemask(&tmp, &pol->w.user_nodemask, nodes); pol->v.preferred_node = first_node(tmp); - } else if (pol->v.preferred_node != -1) { + } else if (!(pol->flags & MPOL_F_LOCAL)) { pol->v.preferred_node = node_remap(pol->v.preferred_node, pol->w.cpuset_mems_allowed, *nodes); @@ -645,7 +646,7 @@ static void get_policy_nodemask(struct mempolicy *p, nodemask_t *nodes) *nodes = p->v.nodes; break; case MPOL_PREFERRED: - if (p->v.preferred_node >= 0) + if (!(p->flags & MPOL_F_LOCAL)) node_set(p->v.preferred_node, *nodes); /* else return empty node mask for local allocation */ break; @@ -1324,13 +1325,12 @@ static nodemask_t *policy_nodemask(gfp_t gfp, struct mempolicy *policy) /* Return a zonelist indicated by gfp for node representing a mempolicy */ static struct zonelist *policy_zonelist(gfp_t gfp, struct mempolicy *policy) { - int nd; + int nd = numa_node_id(); switch (policy->mode) { case MPOL_PREFERRED: - nd = policy->v.preferred_node; - if (nd < 0) - nd = numa_node_id(); + if (!(policy->flags & MPOL_F_LOCAL)) + nd = policy->v.preferred_node; break; case MPOL_BIND: /* @@ -1339,16 +1339,13 @@ static struct zonelist *policy_zonelist(gfp_t gfp, struct mempolicy *policy) * current node is part of the mask, we use the zonelist for * the first node in the mask instead. */ - nd = numa_node_id(); if (unlikely(gfp & __GFP_THISNODE) && unlikely(!node_isset(nd, policy->v.nodes))) nd = first_node(policy->v.nodes); break; case MPOL_INTERLEAVE: /* should not happen */ - nd = numa_node_id(); break; default: - nd = 0; BUG(); } return node_zonelist(nd, gfp); @@ -1379,14 +1376,15 @@ static unsigned interleave_nodes(struct mempolicy *policy) */ unsigned slab_node(struct mempolicy *policy) { - if (!policy) + if (!policy || policy->flags & MPOL_F_LOCAL) return numa_node_id(); switch (policy->mode) { case MPOL_PREFERRED: - if (unlikely(policy->v.preferred_node >= 0)) - return policy->v.preferred_node; - return numa_node_id(); + /* + * handled MPOL_F_LOCAL above + */ + return policy->v.preferred_node; case MPOL_INTERLEAVE: return interleave_nodes(policy); @@ -1666,7 +1664,8 @@ int __mpol_equal(struct mempolicy *a, struct mempolicy *b) case MPOL_INTERLEAVE: return nodes_equal(a->v.nodes, b->v.nodes); case MPOL_PREFERRED: - return a->v.preferred_node == b->v.preferred_node; + return a->v.preferred_node == b->v.preferred_node && + a->flags == b->flags; default: BUG(); return 0; @@ -1946,7 +1945,7 @@ void numa_default_policy(void) } /* - * "local" is pseudo-policy: MPOL_PREFERRED with preferred_node == -1 + * "local" is pseudo-policy: MPOL_PREFERRED with MPOL_F_LOCAL flag * Used only for mpol_to_str() */ #define MPOL_LOCAL (MPOL_INTERLEAVE + 1) @@ -1962,7 +1961,6 @@ 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; @@ -1979,11 +1977,10 @@ static inline int mpol_to_str(char *buffer, int maxlen, struct mempolicy *pol) case MPOL_PREFERRED: nodes_clear(nodes); - nid = pol->v.preferred_node; - if (nid < 0) + if (flags & MPOL_F_LOCAL) mode = MPOL_LOCAL; /* pseudo-policy */ else - node_set(nid, nodes); + node_set(pol->v.preferred_node, nodes); break; case MPOL_BIND: @@ -2004,7 +2001,7 @@ static inline int mpol_to_str(char *buffer, int maxlen, struct mempolicy *pol) strcpy(p, policy_types[mode]); p += l; - if (flags) { + if (flags & MPOL_MODE_FLAGS) { int need_bar = 0; if (buffer + maxlen < p + 2) |