The patch titled
Subject: mm/mempolicy: enable page allocation for MPOL_PREFERRED_MANY for general cases
has been added to the -mm tree. Its filename is
mm-mempolicy-enable-page-allocation-for-mpol_preferred_many-for-general-cases.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-mempolicy-enable-page-allocation-for-mpol_preferred_many-for-general-cases.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-mempolicy-enable-page-allocation-for-mpol_preferred_many-for-general-cases.patch
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------------------------------------------------------
From: Ben Widawsky <ben.widawsky@xxxxxxxxx>
Subject: mm/mempolicy: enable page allocation for MPOL_PREFERRED_MANY for general cases
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().
Link: https://lkml.kernel.org/r/1626077374-81682-4-git-send-email-feng.tang@xxxxxxxxx
Signed-off-by: Ben Widawsky <ben.widawsky@xxxxxxxxx>
Signed-off-by: Feng Tang <feng.tang@xxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Huang Ying <ying.huang@xxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Cc: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/mempolicy.c | 8 ++++++++
1 file changed, 8 insertions(+)
--- a/mm/mempolicy.c~mm-mempolicy-enable-page-allocation-for-mpol_preferred_many-for-general-cases
+++ a/mm/mempolicy.c
@@ -2207,6 +2207,12 @@ struct page *alloc_pages_vma(gfp_t gfp,
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, unsi
*/
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()),
_
Patches currently in -mm which might be from ben.widawsky@xxxxxxxxx are
mm-mempolicy-enable-page-allocation-for-mpol_preferred_many-for-general-cases.patch
mm-hugetlb-add-support-for-mempolicy-mpol_preferred_many.patch
mm-mempolicy-advertise-new-mpol_preferred_many.patch
