[PATCH v6 3/6] mm/mempolicy: enable page allocation for MPOL_PREFERRED_MANY for general cases
From: Feng Tang <hidden>
Date: 2021-07-12 09:04:18
Also in:
linux-api, lkml
Subsystem:
memory management, memory management - memory policy and migration, the rest · Maintainers:
Andrew Morton, David Hildenbrand, Linus Torvalds
From: Ben Widawsky <redacted> In order to support MPOL_PREFERRED_MANY which is used by set_mempolicy(2), mbind(2), enable both alloc_pages() and alloc_pages_vma() by using alloc_page_preferred_many(). Signed-off-by: Ben Widawsky <redacted> Signed-off-by: Feng Tang <redacted> --- mm/mempolicy.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index d17bf018efcc..9dce67fc9bb6 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c@@ -2207,6 +2207,12 @@ struct page *alloc_pages_vma(gfp_t gfp, int order, struct vm_area_struct *vma, goto out; } + if (pol->mode == MPOL_PREFERRED_MANY) { + page = alloc_page_preferred_many(gfp, order, pol); + mpol_cond_put(pol); + goto out; + } + if (unlikely(IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE) && hugepage)) { int hpage_node = node;
@@ -2286,6 +2292,8 @@ struct page *alloc_pages(gfp_t gfp, unsigned order) */ if (pol->mode == MPOL_INTERLEAVE) page = alloc_page_interleave(gfp, order, interleave_nodes(pol)); + else if (pol->mode == MPOL_PREFERRED_MANY) + page = alloc_page_preferred_many(gfp, order, pol); else page = __alloc_pages(gfp, order, policy_node(gfp, pol, numa_node_id()),
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2.7.4