From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pd0-f173.google.com (mail-pd0-f173.google.com [209.85.192.173]) by kanga.kvack.org (Postfix) with ESMTP id 97D046B0035 for ; Fri, 9 May 2014 11:18:34 -0400 (EDT) Received: by mail-pd0-f173.google.com with SMTP id y10so3836463pdj.4 for ; Fri, 09 May 2014 08:18:34 -0700 (PDT) Received: from mail-pd0-x236.google.com (mail-pd0-x236.google.com [2607:f8b0:400e:c02::236]) by mx.google.com with ESMTPS id qm15si2153543pab.185.2014.05.09.08.18.33 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Fri, 09 May 2014 08:18:33 -0700 (PDT) Received: by mail-pd0-f182.google.com with SMTP id v10so3857391pde.27 for ; Fri, 09 May 2014 08:18:33 -0700 (PDT) From: Jianyu Zhan Subject: [PATCH] mm: use a irq-safe __mod_zone_page_state in mlocked_vma_newpage() Date: Fri, 9 May 2014 23:17:48 +0800 Message-Id: <1399648668-17420-1-git-send-email-nasa4836@gmail.com> Sender: owner-linux-mm@kvack.org List-ID: To: akpm@linux-foundation.org, hannes@cmpxchg.org, riel@redhat.com, mhocko@suse.cz, aarcange@redhat.com, hanpt@linux.vnet.ibm.com, mgorman@suse.de, oleg@redhat.com, cldu@marvell.com, fabf@skynet.be, sasha.levin@oracle.com, zhangyanfei@cn.fujitsu.com Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, nasa4836@gmail.com mlocked_vma_newpage() is only called in fault path by page_add_new_anon_rmap(), which is called on a *new* page. And such page is initially only visible via the pagetables, and the pte is locked while calling page_add_new_anon_rmap(), so we could use a irq-safe version of __mod_zone_page_state() here. Signed-off-by: Jianyu Zhan --- mm/internal.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/internal.h b/mm/internal.h index 07b6736..69079b1 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -196,7 +196,7 @@ static inline int mlocked_vma_newpage(struct vm_area_struct *vma, return 0; if (!TestSetPageMlocked(page)) { - mod_zone_page_state(page_zone(page), NR_MLOCK, + __mod_zone_page_state(page_zone(page), NR_MLOCK, hpage_nr_pages(page)); count_vm_event(UNEVICTABLE_PGMLOCKED); } -- 2.0.0-rc1 -- 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