From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752839AbcI0NXV (ORCPT ); Tue, 27 Sep 2016 09:23:21 -0400 Received: from mail-lf0-f67.google.com ([209.85.215.67]:34570 "EHLO mail-lf0-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750840AbcI0NXN (ORCPT ); Tue, 27 Sep 2016 09:23:13 -0400 From: Piotr Kwapulinski To: akpm@linux-foundation.org Cc: kirill.shutemov@linux.intel.com, vbabka@suse.cz, rientjes@google.com, mhocko@kernel.org, mgorman@techsingularity.net, liangchen.linux@gmail.com, nzimmer@sgi.com, a.p.zijlstra@chello.nl, cl@linux.com, riel@redhat.com, lee.schermerhorn@hp.com, jmarchan@redhat.com, joe@perches.com, corbet@lwn.net, iamyooon@gmail.com, n-horiguchi@ah.jp.nec.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-man@vger.kernel.org, mtk.manpages@gmail.com, linux-doc@vger.kernel.org, linux-api@vger.kernel.org, kwapulinski.piotr@gmail.com Subject: [PATCH 1/1] mm/mempolicy.c: add MPOL_LOCAL NUMA memory policy documentation Date: Tue, 27 Sep 2016 15:22:54 +0200 Message-Id: <20160927132254.12050-1-kwapulinski.piotr@gmail.com> X-Mailer: git-send-email 2.10.0 In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The MPOL_LOCAL mode has been implemented by Peter Zijlstra (commit: 479e2802d09f1e18a97262c4c6f8f17ae5884bd8). Add the documentation for this mode. Signed-off-by: Piotr Kwapulinski --- Documentation/vm/numa_memory_policy.txt | 8 ++++++++ mm/mempolicy.c | 4 ++++ 2 files changed, 12 insertions(+) diff --git a/Documentation/vm/numa_memory_policy.txt b/Documentation/vm/numa_memory_policy.txt index 622b927..dcb490e 100644 --- a/Documentation/vm/numa_memory_policy.txt +++ b/Documentation/vm/numa_memory_policy.txt @@ -212,6 +212,14 @@ Components of Memory Policies the temporary interleaved system default policy works in this mode. + MPOL_LOCAL: This mode specifies "local allocation". It must be + used along with an empty nodemask. It acts like the MPOL_PREFERRED + mode specified with an empty nodemask. For details refer to + the MPOL_PREFERRED mode described above. + + Internally, it is transformed into MPOL_PREFERRED mode with an + empty nodemask. + Linux memory policy supports the following optional mode flags: MPOL_F_STATIC_NODES: This flag specifies that the nodemask passed by diff --git a/mm/mempolicy.c b/mm/mempolicy.c index 2da72a5..02dc43e 100644 --- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -35,6 +35,10 @@ * use the process policy. This is what Linux always did * in a NUMA aware kernel and still does by, ahem, default. * + * local "Local allocation". It acts like a special case of + * "preferred" memory policy: NUMA_NO_NODE (see above + * for details). + * * The process policy is applied for most non interrupt memory allocations * in that process' context. Interrupts ignore the policies and always * try to allocate on the local CPU. The VMA policy is only applied for memory -- 2.10.0