diff options
Diffstat (limited to 'mm/mempolicy.c')
| -rw-r--r-- | mm/mempolicy.c | 20 |
1 files changed, 11 insertions, 9 deletions
diff --git a/mm/mempolicy.c b/mm/mempolicy.c index 8d369cee0cd6..7f80ebcd6552 100644 --- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -1758,23 +1758,25 @@ unsigned int mempolicy_slab_node(void) } } -/* Do static interleaving for a VMA with known offset. */ +/* + * Do static interleaving for a VMA with known offset @n. Returns the n'th + * node in pol->v.nodes (starting from n=0), wrapping around if n exceeds the + * number of present nodes. + */ static unsigned offset_il_node(struct mempolicy *pol, - struct vm_area_struct *vma, unsigned long off) + struct vm_area_struct *vma, unsigned long n) { unsigned nnodes = nodes_weight(pol->v.nodes); unsigned target; - int c; - int nid = NUMA_NO_NODE; + int i; + int nid; if (!nnodes) return numa_node_id(); - target = (unsigned int)off % nnodes; - c = 0; - do { + target = (unsigned int)n % nnodes; + nid = first_node(pol->v.nodes); + for (i = 0; i < target; i++) nid = next_node(nid, pol->v.nodes); - c++; - } while (c <= target); return nid; } |