From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752034Ab2HMLOl (ORCPT ); Mon, 13 Aug 2012 07:14:41 -0400 Received: from e28smtp09.in.ibm.com ([122.248.162.9]:51382 "EHLO e28smtp09.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751576Ab2HMLOk (ORCPT ); Mon, 13 Aug 2012 07:14:40 -0400 Message-ID: <5028E192.9000005@linux.vnet.ibm.com> Date: Mon, 13 Aug 2012 19:14:26 +0800 From: Xiao Guangrong User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:14.0) Gecko/20120717 Thunderbird/14.0 MIME-Version: 1.0 To: Xiao Guangrong CC: Andrew Morton , Andrea Arcangeli , Hugh Dickins , David Rientjes , LKML , Linux Memory Management List Subject: [PATCH 04/12] thp: remove unnecessary khugepaged_thread check References: <5028E12C.70101@linux.vnet.ibm.com> In-Reply-To: <5028E12C.70101@linux.vnet.ibm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit x-cbid: 12081311-2674-0000-0000-00000594BE47 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Now, khugepaged creation and cancel are completely serial under the protection of khugepaged_mutex, it is impossible that many khugepaged entities are running Signed-off-by: Xiao Guangrong --- mm/huge_memory.c | 5 +---- 1 files changed, 1 insertions(+), 4 deletions(-) diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 3715c52..b218700 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -2348,11 +2348,8 @@ static int khugepaged(void *none) set_freezable(); set_user_nice(current, 19); - while (!kthread_should_stop()) { - VM_BUG_ON(khugepaged_thread != current); + while (!kthread_should_stop()) khugepaged_loop(); - VM_BUG_ON(khugepaged_thread != current); - } spin_lock(&khugepaged_mm_lock); mm_slot = khugepaged_scan.mm_slot; -- 1.7.7.6