From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx117.postini.com [74.125.245.117]) by kanga.kvack.org (Postfix) with SMTP id C897F6B0070 for ; Mon, 13 Aug 2012 07:14:33 -0400 (EDT) Received: from /spool/local by e28smtp07.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 13 Aug 2012 16:44:31 +0530 Received: from d28av02.in.ibm.com (d28av02.in.ibm.com [9.184.220.64]) by d28relay04.in.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id q7DBES6a16449670 for ; Mon, 13 Aug 2012 16:44:28 +0530 Received: from d28av02.in.ibm.com (loopback [127.0.0.1]) by d28av02.in.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id q7DBESB8003514 for ; Mon, 13 Aug 2012 21:14:28 +1000 Message-ID: <5028E192.9000005@linux.vnet.ibm.com> Date: Mon, 13 Aug 2012 19:14:26 +0800 From: Xiao Guangrong MIME-Version: 1.0 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 Sender: owner-linux-mm@kvack.org List-ID: To: Xiao Guangrong Cc: Andrew Morton , Andrea Arcangeli , Hugh Dickins , David Rientjes , LKML , Linux Memory Management List 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 -- 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