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| author | Li RongQing <lirongqing@baidu.com> | 2025-08-14 18:23:33 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-10-19 16:33:58 +0200 |
| commit | b9737c2063ab06fcfac0832e9ea261bc8b6f24b2 (patch) | |
| tree | 98bd2473423867a7194dcb1ad14b2bf801789fef /mm | |
| parent | 856fe1a900a6c0e718d0edb34235344de57c59e0 (diff) | |
| download | linux-b9737c2063ab06fcfac0832e9ea261bc8b6f24b2.tar.gz linux-b9737c2063ab06fcfac0832e9ea261bc8b6f24b2.tar.bz2 linux-b9737c2063ab06fcfac0832e9ea261bc8b6f24b2.zip | |
mm/hugetlb: early exit from hugetlb_pages_alloc_boot() when max_huge_pages=0
commit b322e88b3d553e85b4e15779491c70022783faa4 upstream.
Optimize hugetlb_pages_alloc_boot() to return immediately when
max_huge_pages is 0, avoiding unnecessary CPU cycles and the below log
message when hugepages aren't configured in the kernel command line.
[ 3.702280] HugeTLB: allocation took 0ms with hugepage_allocation_threads=32
Link: https://lkml.kernel.org/r/20250814102333.4428-1-lirongqing@baidu.com
Signed-off-by: Li RongQing <lirongqing@baidu.com>
Reviewed-by: Dev Jain <dev.jain@arm.com>
Tested-by: Dev Jain <dev.jain@arm.com>
Reviewed-by: Jane Chu <jane.chu@oracle.com>
Acked-by: David Hildenbrand <david@redhat.com>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/hugetlb.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c index fff6edb1174d..d404532ae41e 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -3453,6 +3453,9 @@ static void __init hugetlb_hstate_alloc_pages(struct hstate *h) initialized = true; } + if (!h->max_huge_pages) + return; + /* do node specific alloc */ if (hugetlb_hstate_alloc_pages_specific_nodes(h)) return; |