From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from song.cn.fujitsu.com (unknown [222.73.24.84]) by ozlabs.org (Postfix) with ESMTP id E7A8E2C007C for ; Wed, 16 Jan 2013 19:15:29 +1100 (EST) From: Lin Feng To: akpm@linux-foundation.org, mhocko@suse.cz, linux-mm@kvack.org, tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, jbeulich@suse.com, dhowells@redhat.com, wency@cn.fujitsu.com, isimatu.yasuaki@jp.fujitsu.com, paul.gortmaker@windriver.com, laijs@cn.fujitsu.com, kamezawa.hiroyu@jp.fujitsu.com, mel@csn.ul.ie, minchan@kernel.org, aquini@redhat.com, jiang.liu@huawei.com, tony.luck@intel.com, fenghua.yu@intel.com, benh@kernel.crashing.org, paulus@samba.org, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, davem@davemloft.net, michael@ellerman.id.au, gerald.schaefer@de.ibm.com, gregkh@linuxfoundation.org Subject: [PATCH v3 0/2] memory-hotplug: introduce CONFIG_HAVE_BOOTMEM_INFO_NODE and revert register_page_bootmem_info_node() when platform not support Date: Wed, 16 Jan 2013 16:14:17 +0800 Message-Id: <1358324059-9608-1-git-send-email-linfeng@cn.fujitsu.com> Cc: linux-s390@vger.kernel.org, linux-ia64@vger.kernel.org, x86@kernel.org, linux-kernel@vger.kernel.org, tangchen@cn.fujitsu.com, linfeng@cn.fujitsu.com, sparclinux@vger.kernel.org, linux390@de.ibm.com, linuxppc-dev@lists.ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Memory-hotplug codes for x86_64 have been implemented by patchset: https://lkml.org/lkml/2013/1/9/124 While other platforms haven't been completely implemented yet. If we enable both CONFIG_MEMORY_HOTPLUG_SPARSE and CONFIG_SPARSEMEM_VMEMMAP, register_page_bootmem_info_node() may be buggy, which is a hotplug generic function but falling back to call platform related function register_page_bootmem_memmap(). Other platforms such as powerpc it's not implemented, so on such platforms, revert them to empty as they were before. It's implemented by adding a new Kconfig option named CONFIG_HAVE_BOOTMEM_INFO_NODE, which will be automatically selected by memory-hotplug supported archs(currently only on x86_64). changeLog v2->v3: 1) patch 1/2: - Rename the patch title to conform it's content. - Update memory_hotplug.h and remove the misleading TODO pointed out by Michal. 2) patch 2/2: - New added, remove unimplemented functions suggested by Michal. ChangeLog v1->v2: 1) patch 1/2: - Add a Kconfig option named HAVE_BOOTMEM_INFO_NODE suggested by Michal, which will be automatically selected by supported archs(currently only on x86_64). Lin Feng (1): memory-hotplug: revert register_page_bootmem_info_node() to empty when platform related code is not implemented Michal Hocko (1): memory-hotplug: cleanup: removing the arch specific functions without any implementation arch/ia64/mm/discontig.c | 5 ----- arch/powerpc/mm/init_64.c | 5 ----- arch/s390/mm/vmem.c | 6 ------ arch/sparc/mm/init_64.c | 5 ----- arch/x86/mm/init_64.c | 2 +- include/linux/memory_hotplug.h | 6 ++++++ mm/Kconfig | 8 ++++++++ mm/memory_hotplug.c | 2 ++ 8 files changed, 17 insertions(+), 22 deletions(-)