The quilt patch titled
Subject: hugetlb: fix hugepages_setup when deal with pernode
has been removed from the -mm tree. Its filename was
hugetlb-fix-hugepages_setup-when-deal-with-pernode.patch
This patch was dropped because it was merged into mm-stable
------------------------------------------------------
From: Peng Liu <liupeng256@xxxxxxxxxx>
Subject: hugetlb: fix hugepages_setup when deal with pernode
Hugepages can be specified to pernode since "hugetlbfs: extend the
definition of hugepages parameter to support node allocation", but the
following problem is observed.
Confusing behavior is observed when both 1G and 2M hugepage is set
after "numa=off".
cmdline hugepage settings:
hugepagesz=1G hugepages=0:3,1:3
hugepagesz=2M hugepages=0:1024,1:1024
results:
HugeTLB registered 1.00 GiB page size, pre-allocated 0 pages
HugeTLB registered 2.00 MiB page size, pre-allocated 1024 pages
Furthermore, confusing behavior can be also observed when an invalid node
behind a valid node. To fix this, never allocate any typical hugepage
when an invalid parameter is received.
Link: https://lkml.kernel.org/r/20220413032915.251254-3-liupeng256@xxxxxxxxxx
Fixes: b5389086ad7b ("hugetlbfs: extend the definition of hugepages parameter to support node allocation")
Signed-off-by: Peng Liu <liupeng256@xxxxxxxxxx>
Reviewed-by: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Cc: Baolin Wang <baolin.wang@xxxxxxxxxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Liu Yuntao <liuyuntao10@xxxxxxxxxx>
Cc: Muchun Song <songmuchun@xxxxxxxxxxxxx>
Cc: Zhenguo Yao <yaozhenguo1@xxxxxxxxx>
Cc: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/hugetlb.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
--- a/mm/hugetlb.c~hugetlb-fix-hugepages_setup-when-deal-with-pernode
+++ a/mm/hugetlb.c
@@ -4122,6 +4122,20 @@ bool __init __weak hugetlb_node_alloc_su
{
return true;
}
+
+static void __init hugepages_clear_pages_in_node(void)
+{
+ if (!hugetlb_max_hstate) {
+ default_hstate_max_huge_pages = 0;
+ memset(default_hugepages_in_node, 0,
+ MAX_NUMNODES * sizeof(unsigned int));
+ } else {
+ parsed_hstate->max_huge_pages = 0;
+ memset(parsed_hstate->max_huge_pages_node, 0,
+ MAX_NUMNODES * sizeof(unsigned int));
+ }
+}
+
/*
* hugepages command line processing
* hugepages normally follows a valid hugepagsz or default_hugepagsz
@@ -4209,6 +4223,7 @@ static int __init hugepages_setup(char *
invalid:
pr_warn("HugeTLB: Invalid hugepages parameter %s\n", p);
+ hugepages_clear_pages_in_node();
return 0;
}
__setup("hugepages=", hugepages_setup);
_
Patches currently in -mm which might be from liupeng256@xxxxxxxxxx are
