When gbl_reserve is 0, hugetlb_acct_memory() will do nothing except holding and releasing hugetlb_lock. Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx> --- mm/hugetlb.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 737b2dce19e6..fe2da9ad6233 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -5241,7 +5241,8 @@ long hugetlb_unreserve_pages(struct inode *inode, long start, long end, * reservations to be released may be adjusted. */ gbl_reserve = hugepage_subpool_put_pages(spool, (chg - freed)); - hugetlb_acct_memory(h, -gbl_reserve); + if (gbl_reserve) + hugetlb_acct_memory(h, -gbl_reserve); return 0; } -- 2.19.1
