From: David Rientjes <rientjes@google.com> To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Christoph Lameter <cl@linux-foundation.org>, Pekka Enberg <penberg@cs.helsinki.fi>, Andi Kleen <andi@firstfloor.org>, Nick Piggin <npiggin@suse.de>, linux-kernel@vger.kernel.org, linux-mm@kvack.org, haicheng.li@intel.com Subject: Re: [patch] slab: add memory hotplug support Date: Tue, 2 Mar 2010 18:39:20 -0800 (PST) [thread overview] Message-ID: <alpine.DEB.2.00.1003021836040.2205@chino.kir.corp.google.com> (raw) In-Reply-To: <20100303102844.fe740203.kamezawa.hiroyu@jp.fujitsu.com> On Wed, 3 Mar 2010, KAMEZAWA Hiroyuki wrote: > At node hot-add > > * pgdat is allocated from other node (because we have no memory for "nid") > * memmap for the first section (and possiby others) will be allocated from > other nodes. > * Once a section for the node is onlined, any memory can be allocated localy. > Correct, and the struct kmem_list3 is also alloacted from other nodes with my patch. > (Allocating memory from local node requires some new implementation as > bootmem allocater, we didn't that.) > > Before this patch, slab's control layer is allocated by cpuhotplug. > So, at least keeping this order, > memory online -> cpu online > slab's control layer is allocated from local node. > > When node-hotadd is done in this order > cpu online -> memory online > kmalloc_node() will allocate memory from other node via fallback. > > After this patch, slab's control layer is allocated by memory hotplug. > Then, in any order, slab's control will be allocated via fallback routine. > Again, this addresses memory hotplug that requires a new node to be onlined that do not have corresponding cpus that are being onlined. On x86, these represent ACPI_SRAT_MEM_HOT_PLUGGABLE regions that are onlined either by the acpi hotplug or done manually with CONFIG_ARCH_MEMORY_PROBE. On other architectures such as powerpc, this is done in different ways. All of this is spelled out in the changelog for the patch.
WARNING: multiple messages have this Message-ID (diff)
From: David Rientjes <rientjes@google.com> To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Christoph Lameter <cl@linux-foundation.org>, Pekka Enberg <penberg@cs.helsinki.fi>, Andi Kleen <andi@firstfloor.org>, Nick Piggin <npiggin@suse.de>, linux-kernel@vger.kernel.org, linux-mm@kvack.org, haicheng.li@intel.com Subject: Re: [patch] slab: add memory hotplug support Date: Tue, 2 Mar 2010 18:39:20 -0800 (PST) [thread overview] Message-ID: <alpine.DEB.2.00.1003021836040.2205@chino.kir.corp.google.com> (raw) In-Reply-To: <20100303102844.fe740203.kamezawa.hiroyu@jp.fujitsu.com> On Wed, 3 Mar 2010, KAMEZAWA Hiroyuki wrote: > At node hot-add > > * pgdat is allocated from other node (because we have no memory for "nid") > * memmap for the first section (and possiby others) will be allocated from > other nodes. > * Once a section for the node is onlined, any memory can be allocated localy. > Correct, and the struct kmem_list3 is also alloacted from other nodes with my patch. > (Allocating memory from local node requires some new implementation as > bootmem allocater, we didn't that.) > > Before this patch, slab's control layer is allocated by cpuhotplug. > So, at least keeping this order, > memory online -> cpu online > slab's control layer is allocated from local node. > > When node-hotadd is done in this order > cpu online -> memory online > kmalloc_node() will allocate memory from other node via fallback. > > After this patch, slab's control layer is allocated by memory hotplug. > Then, in any order, slab's control will be allocated via fallback routine. > Again, this addresses memory hotplug that requires a new node to be onlined that do not have corresponding cpus that are being onlined. On x86, these represent ACPI_SRAT_MEM_HOT_PLUGGABLE regions that are onlined either by the acpi hotplug or done manually with CONFIG_ARCH_MEMORY_PROBE. On other architectures such as powerpc, this is done in different ways. All of this is spelled out in the changelog for the patch. -- 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: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2010-03-03 2:39 UTC|newest] Thread overview: 170+ messages / expand[flat|nested] mbox.gz Atom feed top 2010-02-11 20:53 [PATCH] [0/4] Update slab memory hotplug series Andi Kleen 2010-02-11 20:53 ` Andi Kleen 2010-02-11 20:54 ` [PATCH] [1/4] SLAB: Handle node-not-up case in fallback_alloc() v2 Andi Kleen 2010-02-11 20:54 ` Andi Kleen 2010-02-11 21:41 ` David Rientjes 2010-02-11 21:41 ` David Rientjes 2010-02-11 21:55 ` Andi Kleen 2010-02-11 21:55 ` Andi Kleen 2010-02-15 6:04 ` Nick Piggin 2010-02-15 6:04 ` Nick Piggin 2010-02-15 10:07 ` Andi Kleen 2010-02-15 10:07 ` Andi Kleen 2010-02-15 10:22 ` Nick Piggin 2010-02-15 10:22 ` Nick Piggin 2010-02-11 20:54 ` [PATCH] [2/4] SLAB: Separate node initialization into separate function Andi Kleen 2010-02-11 20:54 ` Andi Kleen 2010-02-11 21:44 ` David Rientjes 2010-02-11 21:44 ` David Rientjes 2010-02-11 20:54 ` [PATCH] [3/4] SLAB: Set up the l3 lists for the memory of freshly added memory v2 Andi Kleen 2010-02-11 20:54 ` Andi Kleen 2010-02-11 21:45 ` David Rientjes 2010-02-11 21:45 ` David Rientjes 2010-02-15 6:06 ` Nick Piggin 2010-02-15 6:06 ` Nick Piggin 2010-02-15 21:47 ` David Rientjes 2010-02-15 21:47 ` David Rientjes 2010-02-16 14:04 ` Nick Piggin 2010-02-16 14:04 ` Nick Piggin 2010-02-16 20:45 ` Pekka Enberg 2010-02-16 20:45 ` Pekka Enberg 2010-02-11 20:54 ` [PATCH] [4/4] SLAB: Fix node add timer race in cache_reap Andi Kleen 2010-02-11 20:54 ` Andi Kleen 2010-02-11 21:45 ` David Rientjes 2010-02-11 21:45 ` David Rientjes 2010-02-15 6:15 ` Nick Piggin 2010-02-15 6:15 ` Nick Piggin 2010-02-15 10:32 ` Andi Kleen 2010-02-15 10:32 ` Andi Kleen 2010-02-15 10:41 ` Nick Piggin 2010-02-15 10:41 ` Nick Piggin 2010-02-15 10:52 ` Andi Kleen 2010-02-15 10:52 ` Andi Kleen 2010-02-15 11:01 ` Nick Piggin 2010-02-15 11:01 ` Nick Piggin 2010-02-15 15:30 ` Andi Kleen 2010-02-15 15:30 ` Andi Kleen 2010-02-19 18:22 ` Christoph Lameter 2010-02-19 18:22 ` Christoph Lameter 2010-02-20 9:01 ` Andi Kleen 2010-02-20 9:01 ` Andi Kleen 2010-02-22 10:53 ` Pekka Enberg 2010-02-22 10:53 ` Pekka Enberg 2010-02-22 14:31 ` Andi Kleen 2010-02-22 14:31 ` Andi Kleen 2010-02-22 16:11 ` Pekka Enberg 2010-02-22 16:11 ` Pekka Enberg 2010-02-22 20:20 ` Andi Kleen 2010-02-22 20:20 ` Andi Kleen 2010-02-24 15:49 ` Christoph Lameter 2010-02-24 15:49 ` Christoph Lameter 2010-02-25 7:26 ` Pekka Enberg 2010-02-25 7:26 ` Pekka Enberg 2010-02-25 8:01 ` David Rientjes 2010-02-25 8:01 ` David Rientjes 2010-02-25 18:30 ` Christoph Lameter 2010-02-25 18:30 ` Christoph Lameter 2010-02-25 21:45 ` David Rientjes 2010-02-25 21:45 ` David Rientjes 2010-02-25 22:31 ` Christoph Lameter 2010-02-25 22:31 ` Christoph Lameter 2010-02-26 10:45 ` Pekka Enberg 2010-02-26 10:45 ` Pekka Enberg 2010-02-26 11:43 ` Andi Kleen 2010-02-26 11:43 ` Andi Kleen 2010-02-26 12:35 ` Pekka Enberg 2010-02-26 12:35 ` Pekka Enberg 2010-02-26 14:08 ` Andi Kleen 2010-02-26 14:08 ` Andi Kleen 2010-02-26 1:09 ` KAMEZAWA Hiroyuki 2010-02-26 1:09 ` KAMEZAWA Hiroyuki 2010-02-26 11:41 ` Andi Kleen 2010-02-26 11:41 ` Andi Kleen 2010-02-26 15:04 ` Christoph Lameter 2010-02-26 15:04 ` Christoph Lameter 2010-02-26 15:05 ` Christoph Lameter 2010-02-26 15:05 ` Christoph Lameter 2010-02-26 15:59 ` Andi Kleen 2010-02-26 15:59 ` Andi Kleen 2010-02-26 15:57 ` Andi Kleen 2010-02-26 15:57 ` Andi Kleen 2010-02-26 17:24 ` Christoph Lameter 2010-02-26 17:24 ` Christoph Lameter 2010-02-26 17:31 ` Andi Kleen 2010-02-26 17:31 ` Andi Kleen 2010-03-01 1:59 ` KAMEZAWA Hiroyuki 2010-03-01 1:59 ` KAMEZAWA Hiroyuki 2010-03-01 10:27 ` David Rientjes 2010-03-01 10:27 ` David Rientjes 2010-02-27 0:01 ` David Rientjes 2010-02-27 0:01 ` David Rientjes 2010-03-01 10:24 ` [patch] slab: add memory hotplug support David Rientjes 2010-03-01 10:24 ` David Rientjes 2010-03-02 5:53 ` Pekka Enberg 2010-03-02 5:53 ` Pekka Enberg 2010-03-02 20:20 ` Christoph Lameter 2010-03-02 20:20 ` Christoph Lameter 2010-03-02 21:03 ` David Rientjes 2010-03-02 21:03 ` David Rientjes 2010-03-03 1:28 ` KAMEZAWA Hiroyuki 2010-03-03 1:28 ` KAMEZAWA Hiroyuki 2010-03-03 2:39 ` David Rientjes [this message] 2010-03-03 2:39 ` David Rientjes 2010-03-03 2:51 ` KAMEZAWA Hiroyuki 2010-03-03 2:51 ` KAMEZAWA Hiroyuki 2010-03-02 12:53 ` Andi Kleen 2010-03-02 12:53 ` Andi Kleen 2010-03-02 15:04 ` Pekka Enberg 2010-03-02 15:04 ` Pekka Enberg 2010-03-03 14:34 ` Andi Kleen 2010-03-03 14:34 ` Andi Kleen 2010-03-03 15:46 ` Christoph Lameter 2010-03-03 15:46 ` Christoph Lameter 2010-03-02 21:17 ` David Rientjes 2010-03-02 21:17 ` David Rientjes 2010-03-05 6:20 ` Nick Piggin 2010-03-05 6:20 ` Nick Piggin 2010-03-05 12:47 ` Anca Emanuel 2010-03-05 12:47 ` Anca Emanuel 2010-03-05 13:58 ` Anca Emanuel 2010-03-05 13:58 ` Anca Emanuel 2010-03-05 14:11 ` Christoph Lameter 2010-03-05 14:11 ` Christoph Lameter 2010-03-08 3:06 ` Andi Kleen 2010-03-08 3:06 ` Andi Kleen 2010-03-08 2:58 ` Andi Kleen 2010-03-08 2:58 ` Andi Kleen 2010-03-08 23:19 ` David Rientjes 2010-03-08 23:19 ` David Rientjes 2010-03-09 13:46 ` Nick Piggin 2010-03-09 13:46 ` Nick Piggin 2010-03-22 17:28 ` Pekka Enberg 2010-03-22 17:28 ` Pekka Enberg 2010-03-22 21:12 ` Nick Piggin 2010-03-22 21:12 ` Nick Piggin 2010-03-28 2:13 ` David Rientjes 2010-03-28 2:13 ` David Rientjes 2010-03-28 2:40 ` [patch v2] " David Rientjes 2010-03-28 2:40 ` David Rientjes 2010-03-30 9:01 ` Pekka Enberg 2010-03-30 9:01 ` Pekka Enberg 2010-03-30 16:43 ` Christoph Lameter 2010-03-30 16:43 ` Christoph Lameter 2010-04-04 20:45 ` David Rientjes 2010-04-04 20:45 ` David Rientjes 2010-04-07 16:29 ` Pekka Enberg 2010-04-07 16:29 ` Pekka Enberg 2010-02-25 18:34 ` [PATCH] [4/4] SLAB: Fix node add timer race in cache_reap Christoph Lameter 2010-02-25 18:34 ` Christoph Lameter 2010-02-25 18:46 ` Pekka Enberg 2010-02-25 18:46 ` Pekka Enberg 2010-02-25 19:19 ` Christoph Lameter 2010-02-25 19:19 ` Christoph Lameter 2010-03-02 12:55 ` Andi Kleen 2010-03-02 12:55 ` Andi Kleen 2010-02-19 18:22 ` Christoph Lameter 2010-02-19 18:22 ` Christoph Lameter 2010-02-22 10:57 ` Pekka Enberg 2010-02-22 10:57 ` Pekka Enberg 2010-02-13 10:24 ` [PATCH] [0/4] Update slab memory hotplug series Pekka Enberg 2010-02-13 10:24 ` Pekka Enberg
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