From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Fri, 17 Mar 2006 17:20:12 +0900 From: Yasunori Goto Subject: [PATCH: 000/017]Memory hotplug for new nodes v.4. Message-Id: <20060317161948.C637.Y-GOTO@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Andrew Morton Cc: "Luck, Tony" , Andi Kleen , Linux Kernel ML , linux-ia64@vger.kernel.org, linux-mm List-ID: Hello. I'll post newest patches for memory hotadd with pgdat allocation as V4. This includes some of small fixes - Fix compile errors on config HOTADD /NO HOTADD, NUMA/non NUMA, etc. - Add/update some comments. - etc. This patches are for 2.6.16-rc6-mm1. I tested these patch on just Tiger4(ia64) with emulation now. Unfortunately, x86-64 box which I can use has been busy in this week. So, I couldn't make/test patch for it yet. :-( But, probably, remain x86-64's issue is just making arch_register_node() to create sysfs file for new node like 17th patch. When I can use it again, I'll make and test it. Andrew-san. Please apply. --------------------------------------- This is memory hotadd code when new node is added. In this patch, pgdat is allocated when new node is comming. To initialize pgdat and zones, a set of patches are necessary. - to allcate and initialize pgdat, zone, zonelist. - to make new kswapd - to initialize node_data[] array (ia64) - to register sysfs file for new node. - to call memory_hotplug code from acpi container driver which receive ACPI's notification from firmware. Ia64 big NUMA box needs this feature. I heard that x86-64 needs this too. Powerpc might use some of this code. Note: - kzalloc is used for pgdat allocation in this version. So, even if pgdat is allocated, it will be allocated on the other node. This is only to simplify patches a bit. :-P ----------------------------- Followings are updates. Updates from V3 to V4. - update for 2.6.16-rc6-mm1. - Fix compile errors against Hotadd/NoHotadd, NUMA/NonNUMA, etc. - Add/update some comments. - Some functions which can be static become static. - not call add_memory() for already exist memory at acpi_memory_enable_device() Updates from V2 to V3. - update for 2.6.16-rc5-mm3. - The caller function of pgdat allcation and so on become common code. - Passing node id at add_memory(). - build_zonelists() is called after that pages are onlined. - Updating NODE_DATA() for ia64 become simple and become common code between booting and hotadd. (But other consideration will be necessary for hot-remove.) - kswapd is called by kthread_run(). - finding node id by acpi use handle of its memory device. Updates from V1 to V2. - update for 2.6.16-rc5-mm2. - not only ia64, This is tested on x86_64 with NUMA emulation too. :-) - wait_table_size() allcation is changed. - Take max size as much as possible. - Change using GFP_ATOMIC. It is inside of zone_init_lock. (Warining message of might_sleep() is very well.) - stop_machine_run(build_zonelists) is move to outside of lock. - pgdat_insert() is moved to generic code to be used by x86_64. - add decision of ZONE_DMA32 or ZONE_NORMAL to x86_64's add_memory(). - Make a separated patch to change from __init to __meminit. - Fix some typo -- Yasunori Goto -- 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