The patch titled
Subject: mm/hugetlb: try preferred node first when alloc gigantic page from cma
has been added to the -mm tree. Its filename is
mm-hugetlb-try-preferred-node-first-when-alloc-gigantic-page-from-cma.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-hugetlb-try-preferred-node-first-when-alloc-gigantic-page-from-cma.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-hugetlb-try-preferred-node-first-when-alloc-gigantic-page-from-cma.patch
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------------------------------------------------------
From: Li Xinhai <lixinhai.lxh@xxxxxxxxx>
Subject: mm/hugetlb: try preferred node first when alloc gigantic page from cma
Since commit cf11e85fc08cc6a4 ("mm: hugetlb: optionally allocate gigantic
hugepages using cma"), the gigantic page would be allocated from node
which is not the preferred node, although there are pages available from
that node. The reason is that the nid parameter has been ignored in
alloc_gigantic_page().
After this patch, the preferred node is tried first before other allowed
nodes.
Link: http://lkml.kernel.org/r/20200830140418.605627-1-lixinhai.lxh@xxxxxxxxx
Fixes: cf11e85fc08cc6a4 ("mm: hugetlb: optionally allocate gigantic hugepages using cma")
Signed-off-by: Li Xinhai <lixinhai.lxh@xxxxxxxxx>
Cc: Roman Gushchin <guro@xxxxxx>
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/hugetlb.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
--- a/mm/hugetlb.c~mm-hugetlb-try-preferred-node-first-when-alloc-gigantic-page-from-cma
+++ a/mm/hugetlb.c
@@ -1256,8 +1256,15 @@ static struct page *alloc_gigantic_page(
struct page *page;
int node;
+ if (hugetlb_cma[nid]) {
+ page = cma_alloc(hugetlb_cma[nid], nr_pages,
+ huge_page_order(h), true);
+ if (page)
+ return page;
+ }
+
for_each_node_mask(node, *nodemask) {
- if (!hugetlb_cma[node])
+ if (node == nid || !hugetlb_cma[node])
continue;
page = cma_alloc(hugetlb_cma[node], nr_pages,
_
Patches currently in -mm which might be from lixinhai.lxh@xxxxxxxxx are
mm-hugetlb-try-preferred-node-first-when-alloc-gigantic-page-from-cma.patch
mm-isolation-avoid-checking-unmovable-pages-across-pageblock-boundary.patch
