From f87442f407af80dac4dc81c8a7772b71b36b2e09 Mon Sep 17 00:00:00 2001 From: Peng Liu Date: Fri, 29 Apr 2022 14:36:57 -0700 Subject: [PATCH] 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@huawei.com Fixes: b5389086ad7b ("hugetlbfs: extend the definition of hugepages parameter to support node allocation") Signed-off-by: Peng Liu Reviewed-by: Mike Kravetz Cc: Baolin Wang Cc: David Hildenbrand Cc: Liu Yuntao Cc: Muchun Song Cc: Zhenguo Yao Cc: Kefeng Wang Signed-off-by: Andrew Morton --- mm/hugetlb.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 6385f86..c6228cd 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -4122,6 +4122,20 @@ bool __init __weak hugetlb_node_alloc_supported(void) { 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 *s) invalid: pr_warn("HugeTLB: Invalid hugepages parameter %s\n", p); + hugepages_clear_pages_in_node(); return 0; } __setup("hugepages=", hugepages_setup); -- 2.7.4