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| author | Peng Liu <liupeng256@huawei.com> | 2022-04-30 00:36:57 +0300 |
|---|---|---|
| committer | akpm <akpm@linux-foundation.org> | 2022-04-30 00:36:57 +0300 |
| commit | f87442f407af80dac4dc81c8a7772b71b36b2e09 (patch) | |
| tree | c972f061bcca1a8165cba82dba527bb15bf3ac0f /mm/hugetlb.c | |
| parent | 0a7a0f6f7f3679c906fc55e3805c1d5e2c566f55 (diff) | |
| download | linux-f87442f407af80dac4dc81c8a7772b71b36b2e09.tar.xz | |
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 <liupeng256@huawei.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Liu Yuntao <liuyuntao10@huawei.com>
Cc: Muchun Song <songmuchun@bytedance.com>
Cc: Zhenguo Yao <yaozhenguo1@gmail.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/hugetlb.c')
| -rw-r--r-- | mm/hugetlb.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 6385f86a865a..c6228cdddd54 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); |