From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qg0-f41.google.com (mail-qg0-f41.google.com [209.85.192.41]) by kanga.kvack.org (Postfix) with ESMTP id 3F5096B0005 for ; Wed, 6 Apr 2016 09:45:18 -0400 (EDT) Received: by mail-qg0-f41.google.com with SMTP id c6so36050574qga.1 for ; Wed, 06 Apr 2016 06:45:18 -0700 (PDT) Received: from mx1.redhat.com (mx1.redhat.com. [209.132.183.28]) by mx.google.com with ESMTPS id f125si2080552qkb.95.2016.04.06.06.45.17 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 06 Apr 2016 06:45:17 -0700 (PDT) From: Vitaly Kuznetsov Subject: [PATCH 0/2] memory_hotplug: introduce config and command line options to set the default onlining policy Date: Wed, 6 Apr 2016 15:45:10 +0200 Message-Id: <1459950312-25504-1-git-send-email-vkuznets@redhat.com> Sender: owner-linux-mm@kvack.org List-ID: To: linux-mm@kvack.org Cc: linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, Andrew Morton , Jonathan Corbet , Dan Williams , "Kirill A. Shutemov" , Mel Gorman , David Vrabel , David Rientjes , Igor Mammedov This patchset continues the work I started with: commit 31bc3858ea3ebcc3157b3f5f0e624c5962f5a7a6 Author: Vitaly Kuznetsov Date: Tue Mar 15 14:56:48 2016 -0700 memory-hotplug: add automatic onlining policy for the newly added memory Initially I was going to stop there and bring the policy setting logic to userspace. I met two issues on this way: 1) It is possible to have memory hotplugged at boot (e.g. with QEMU). These blocks stay offlined if we turn the onlining policy on by userspace. 2) My attempt to bring this policy setting to systemd failed, systemd maintainers suggest to change the default in kernel or ... to use tmpfiles.d to alter the policy (which looks like a hack to me): https://github.com/systemd/systemd/pull/2938 Here I suggest to add a config option to set the default value for the policy and a kernel command line parameter to make the override. Vitaly Kuznetsov (2): memory_hotplug: introduce CONFIG_MEMORY_HOTPLUG_DEFAULT_ONLINE memory_hotplug: introduce memhp_default_state= command line parameter Documentation/kernel-parameters.txt | 8 ++++++++ Documentation/memory-hotplug.txt | 9 +++++---- mm/Kconfig | 16 ++++++++++++++++ mm/memory_hotplug.c | 15 +++++++++++++++ 4 files changed, 44 insertions(+), 4 deletions(-) -- 2.5.5 -- 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