From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757579Ab2HVPBN (ORCPT ); Wed, 22 Aug 2012 11:01:13 -0400 Received: from mx1.redhat.com ([209.132.183.28]:12408 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932746Ab2HVPBD (ORCPT ); Wed, 22 Aug 2012 11:01:03 -0400 From: Andrea Arcangeli To: linux-kernel@vger.kernel.org, linux-mm@kvack.org Cc: Hillf Danton , Dan Smith , Linus Torvalds , Andrew Morton , Thomas Gleixner , Ingo Molnar , Paul Turner , Suresh Siddha , Mike Galbraith , "Paul E. McKenney" , Lai Jiangshan , Bharata B Rao , Lee Schermerhorn , Rik van Riel , Johannes Weiner , Srivatsa Vaddagiri , Christoph Lameter , Alex Shi , Mauricio Faria de Oliveira , Konrad Rzeszutek Wilk , Don Morris , Benjamin Herrenschmidt Subject: [PATCH 13/36] autonuma: autonuma_enter/exit Date: Wed, 22 Aug 2012 16:58:57 +0200 Message-Id: <1345647560-30387-14-git-send-email-aarcange@redhat.com> In-Reply-To: <1345647560-30387-1-git-send-email-aarcange@redhat.com> References: <1345647560-30387-1-git-send-email-aarcange@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is where we register (and unregister) an "mm" structure into AutoNUMA for knuma_scand to scan them. knuma_scand is the first gear in the whole AutoNUMA algorithm. knuma_scand is the daemon that scans the "mm" structures in the list and sets pmd_numa and pte_numa to allow the NUMA hinting page faults to start. All other actions follow after that. If knuma_scand doesn't run, AutoNUMA is fully bypassed. If knuma_scand is stopped, soon all other AutoNUMA gears will settle down too. Acked-by: Rik van Riel Signed-off-by: Andrea Arcangeli --- kernel/fork.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/kernel/fork.c b/kernel/fork.c index f998e53..fbc67ee 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -70,6 +70,7 @@ #include #include #include +#include #include #include @@ -541,6 +542,7 @@ static struct mm_struct *mm_init(struct mm_struct *mm, struct task_struct *p) if (likely(!mm_alloc_pgd(mm))) { mm->def_flags = 0; mmu_notifier_mm_init(mm); + autonuma_enter(mm); return mm; } @@ -609,6 +611,7 @@ void mmput(struct mm_struct *mm) exit_aio(mm); ksm_exit(mm); khugepaged_exit(mm); /* must run before exit_mmap */ + autonuma_exit(mm); /* must run before exit_mmap */ exit_mmap(mm); set_mm_exe_file(mm, NULL); if (!list_empty(&mm->mmlist)) {