@@ -2281,8 +2281,6 @@ alloc_pages_vma(gfp_t gfp, int order, struct vm_area_struct *vma,
{
struct mempolicy *pol;
struct page *page;
- int preferred_nid;
- nodemask_t *nmask;
pol = get_vma_policy(vma, addr);
@@ -2296,6 +2294,7 @@ alloc_pages_vma(gfp_t gfp, int order, struct vm_area_struct *vma,
}
if (unlikely(IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE) && hugepage)) {
+ nodemask_t *nmask;
int hpage_node = node;
/*
@@ -2309,10 +2308,26 @@ alloc_pages_vma(gfp_t gfp, int order, struct vm_area_struct *vma,
* does not allow the current node in its nodemask, we allocate
* the standard way.
*/
- if ((pol->mode == MPOL_PREFERRED ||
- pol->mode == MPOL_PREFERRED_MANY) &&
- !(pol->flags & MPOL_F_LOCAL))
+ if (pol->mode == MPOL_PREFERRED || !(pol->flags & MPOL_F_LOCAL)) {
hpage_node = first_node(pol->nodes);
+ } else if (pol->mode == MPOL_PREFERRED_MANY) {
+ struct zoneref *z;
+
+ /*
+ * In this policy, with direct reclaim, the normal
+ * policy based allocation will do the right thing - try
+ * twice using the preferred nodes first, and all nodes
+ * second.
+ */
+ if (gfp & __GFP_DIRECT_RECLAIM) {
+ page = alloc_pages_policy(pol, gfp, order, NUMA_NO_NODE);
+ goto out;
+ }
+
+ z = first_zones_zonelist(node_zonelist(numa_node_id(), GFP_HIGHUSER),
+ gfp_zone(GFP_HIGHUSER), &pol->nodes);
+ hpage_node = zone_to_nid(z->zone);
+ }
nmask = policy_nodemask(gfp, pol);
if (!nmask || node_isset(hpage_node, *nmask)) {
@@ -2338,9 +2353,7 @@ alloc_pages_vma(gfp_t gfp, int order, struct vm_area_struct *vma,
}
}
- nmask = policy_nodemask(gfp, pol);
- preferred_nid = policy_node(gfp, pol, node);
- page = __alloc_pages_nodemask(gfp, order, preferred_nid, nmask);
+ page = alloc_pages_policy(pol, gfp, order, NUMA_NO_NODE);
mpol_cond_put(pol);
out:
return page;
This patch implements MPOL_PREFERRED_MANY for alloc_pages_vma(). Like alloc_pages_current(), alloc_pages_vma() needs to support policy based decisions if they've been configured via mbind(2). The temporary "hack" of treating MPOL_PREFERRED and MPOL_PREFERRED_MANY can now be removed with this, too. All the actual machinery to make this work was part of ("mm/mempolicy: Create a page allocator for policy") Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: David Rientjes <rientjes@google.com> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Michal Hocko <mhocko@kernel.org> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Ben Widawsky <ben.widawsky@intel.com> --- mm/mempolicy.c | 29 +++++++++++++++++++++-------- 1 file changed, 21 insertions(+), 8 deletions(-)