From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-oi0-f69.google.com (mail-oi0-f69.google.com [209.85.218.69]) by kanga.kvack.org (Postfix) with ESMTP id A92126B0005 for ; Fri, 17 Jun 2016 08:01:34 -0400 (EDT) Received: by mail-oi0-f69.google.com with SMTP id x6so133972482oif.0 for ; Fri, 17 Jun 2016 05:01:34 -0700 (PDT) Received: from szxga01-in.huawei.com (szxga01-in.huawei.com. [58.251.152.64]) by mx.google.com with ESMTPS id f63si6070728oib.164.2016.06.17.05.01.33 for (version=TLS1 cipher=AES128-SHA bits=128/128); Fri, 17 Jun 2016 05:01:34 -0700 (PDT) Message-ID: <5763E694.1050502@huawei.com> Date: Fri, 17 Jun 2016 20:01:24 +0800 From: zhong jiang MIME-Version: 1.0 Subject: Re: [PATCH] mm: fix account pmd page to the process References: <1466163941-12952-1-git-send-email-zhongjiang@huawei.com> In-Reply-To: <1466163941-12952-1-git-send-email-zhongjiang@huawei.com> Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Michal Hocko , Mike Kravetz , kirill.shutemov@linux.intel.com Cc: Linux Memory Management List , LKML On 2016/6/17 19:45, zhongjiang wrote: > 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: -- 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 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933095AbcFQMBi (ORCPT ); Fri, 17 Jun 2016 08:01:38 -0400 Received: from szxga01-in.huawei.com ([58.251.152.64]:26821 "EHLO szxga01-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755398AbcFQMBh (ORCPT ); Fri, 17 Jun 2016 08:01:37 -0400 Message-ID: <5763E694.1050502@huawei.com> Date: Fri, 17 Jun 2016 20:01:24 +0800 From: zhong jiang User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:12.0) Gecko/20120428 Thunderbird/12.0.1 MIME-Version: 1.0 To: Michal Hocko , Mike Kravetz , CC: Linux Memory Management List , LKML Subject: Re: [PATCH] mm: fix account pmd page to the process References: <1466163941-12952-1-git-send-email-zhongjiang@huawei.com> In-Reply-To: <1466163941-12952-1-git-send-email-zhongjiang@huawei.com> Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit X-Originating-IP: [10.177.29.68] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A020205.5763E69A.0031,ss=1,re=0.000,recu=0.000,reip=0.000,cl=1,cld=1,fgs=0, ip=0.0.0.0, so=2013-06-18 04:22:30, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: a5d0a577133daf7f6949d3cafb371bcf Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2016/6/17 19:45, zhongjiang wrote: > 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: