From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-io0-f197.google.com (mail-io0-f197.google.com [209.85.223.197]) by kanga.kvack.org (Postfix) with ESMTP id CD2376B0005 for ; Fri, 17 Jun 2016 07:59:51 -0400 (EDT) Received: by mail-io0-f197.google.com with SMTP id g13so147804616ioj.3 for ; Fri, 17 Jun 2016 04:59:51 -0700 (PDT) Received: from szxga01-in.huawei.com ([58.251.152.64]) by mx.google.com with ESMTPS id l88si13698616otc.170.2016.06.17.04.59.25 for (version=TLS1 cipher=AES128-SHA bits=128/128); Fri, 17 Jun 2016 04:59:50 -0700 (PDT) From: zhongjiang Subject: [PATCH] mm: fix account pmd page to the process Date: Fri, 17 Jun 2016 19:56:15 +0800 Message-ID: <1466164575-13578-1-git-send-email-zhongjiang@huawei.com> MIME-Version: 1.0 Content-Type: text/plain Sender: owner-linux-mm@kvack.org List-ID: To: mhocko@kernel.org, mike.kravetz@oracle.com, akpm@linux-foundation.org, kirill@shutemov.name Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org From: zhong jiang hen a process acquire a pmd table shared by other process, we increase the account to current process. otherwise, a race result in other tasks have set the pud entry. so it no need to increase it. Signed-off-by: zhong jiang --- mm/hugetlb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 19d0d08..3072857 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -4191,7 +4191,7 @@ pte_t *huge_pmd_share(struct mm_struct *mm, unsigned long addr, pud_t *pud) (pmd_t *)((unsigned long)spte & PAGE_MASK)); } else { put_page(virt_to_page(spte)); - mm_inc_nr_pmds(mm); + mm_dec_nr_pmds(mm); } spin_unlock(ptl); out: -- 1.8.3.1 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org