From: Peter Zijlstra <peterz@infradead.org>
To: Tony Luck <tony.luck@gmail.com>
Cc: Nishanth Aravamudan <nacc@linux.vnet.ibm.com>,
Jiang Liu <jiang.liu@linux.intel.com>,
Andrew Morton <akpm@linux-foundation.org>,
Mel Gorman <mgorman@suse.de>,
David Rientjes <rientjes@google.com>,
Mike Galbraith <umgwanakikbuti@gmail.com>,
"Rafael J . Wysocki" <rafael.j.wysocki@intel.com>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
linux-hotplug@vger.kernel.org,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [RFC Patch V1 00/30] Enable memoryless node on x86 platforms
Date: Mon, 21 Jul 2014 22:06:25 +0200 [thread overview]
Message-ID: <20140721200625.GR3935@laptop> (raw)
In-Reply-To: <CA+8MBbK+ZdisT_yXh_jkWSd4hWEMisG614s4s0EyNV3j-7YOow@mail.gmail.com>
On Mon, Jul 21, 2014 at 10:41:59AM -0700, Tony Luck wrote:
> On Mon, Jul 21, 2014 at 10:23 AM, Nishanth Aravamudan
> <nacc@linux.vnet.ibm.com> wrote:
> > It seems like the issue is the order of onlining of resources on a
> > specific x86 platform?
>
> Yes. When we online a node the BIOS hits us with some ACPI hotplug events:
>
> First: Here are some new cpus
> Next: Here is some new memory
> Last; Here are some new I/O things (PCIe root ports, PCIe devices,
> IOAPICs, IOMMUs, ...)
>
> So there is a period where the node is memoryless - although that will generally
> be resolved when the memory hot plug event arrives ... that isn't guaranteed to
> occur (there might not be any memory on the node, or what memory there is
> may have failed self-test and been disabled).
Right, but we could 'easily' capture that in arch code and make it look
like it was done in a 'sane' order. No need to wreck the rest of the
kernel to support this particular BIOS fuckup.
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prev parent reply other threads:[~2014-07-21 20:06 UTC|newest]
Thread overview: 90+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-11 7:37 [RFC Patch V1 00/30] Enable memoryless node on x86 platforms Jiang Liu
2014-07-11 7:37 ` [RFC Patch V1 01/30] mm, kernel: Use cpu_to_mem()/numa_mem_id() to support memoryless node Jiang Liu
2014-07-11 15:14 ` Paul E. McKenney
2014-07-21 17:15 ` Nishanth Aravamudan
2014-07-21 17:33 ` Paul E. McKenney
2014-07-12 12:32 ` Jens Axboe
2014-07-11 7:37 ` [RFC Patch V1 02/30] mm, sched: " Jiang Liu
2014-07-11 7:37 ` [RFC Patch V1 03/30] mm, net: " Jiang Liu
2014-07-11 7:37 ` [RFC Patch V1 04/30] mm, netfilter: " Jiang Liu
2014-07-11 7:37 ` [RFC Patch V1 05/30] mm, perf: " Jiang Liu
2014-07-11 7:37 ` [RFC Patch V1 06/30] mm, tracing: " Jiang Liu
2014-07-11 7:37 ` [RFC Patch V1 07/30] mm: " Jiang Liu
2014-07-11 13:51 ` Christoph Lameter
2014-07-11 14:42 ` Tejun Heo
2014-07-11 15:13 ` Christoph Lameter
2014-07-11 15:21 ` Tejun Heo
2014-07-11 15:33 ` Tejun Heo
2014-07-11 15:55 ` Christoph Lameter
2014-07-11 15:58 ` Tejun Heo
2014-07-11 16:04 ` Christoph Lameter
2014-07-11 15:58 ` Christoph Lameter
2014-07-11 16:01 ` Tejun Heo
2014-07-11 16:19 ` Christoph Lameter
2014-07-11 16:24 ` Tejun Heo
2014-07-11 17:29 ` Christoph Lameter
2014-07-11 18:28 ` Tejun Heo
2014-07-11 19:11 ` Christoph Lameter
2014-07-23 3:16 ` Jiang Liu
2014-07-11 7:37 ` [RFC Patch V1 08/30] mm, thp: " Jiang Liu
2014-07-11 7:37 ` [RFC Patch V1 09/30] mm, memcg: " Jiang Liu
2014-07-18 7:36 ` Michal Hocko
2014-07-23 3:18 ` Jiang Liu
2014-07-11 7:37 ` [RFC Patch V1 10/30] mm, xfrm: " Jiang Liu
2014-07-11 7:37 ` [RFC Patch V1 11/30] mm, char/mspec.c: " Jiang Liu
2014-07-11 7:37 ` [RFC Patch V1 12/30] mm, IB/qib: " Jiang Liu
2014-07-11 7:37 ` [RFC Patch V1 13/30] mm, i40e: " Jiang Liu
2014-07-11 7:37 ` [RFC Patch V1 14/30] mm, i40evf: " Jiang Liu
2014-07-11 7:37 ` [RFC Patch V1 15/30] mm, igb: " Jiang Liu
2014-07-21 17:42 ` Nishanth Aravamudan
2014-07-21 19:53 ` Alexander Duyck
2014-07-21 21:09 ` Nishanth Aravamudan
2014-07-23 3:20 ` Jiang Liu
2014-07-11 7:37 ` [RFC Patch V1 16/30] mm, ixgbe: " Jiang Liu
2014-07-11 7:37 ` [RFC Patch V1 17/30] mm, intel_powerclamp: " Jiang Liu
2014-07-21 17:38 ` Nishanth Aravamudan
2014-07-11 7:37 ` [RFC Patch V1 18/30] mm, bnx2fc: " Jiang Liu
2014-07-11 7:37 ` [RFC Patch V1 19/30] mm, bnx2i: " Jiang Liu
2014-07-11 7:37 ` [RFC Patch V1 20/30] mm, fcoe: " Jiang Liu
2014-07-11 7:37 ` [RFC Patch V1 21/30] mm, irqchip: " Jiang Liu
2014-07-18 12:40 ` Jason Cooper
2014-07-23 3:47 ` Jiang Liu
2014-07-11 7:37 ` [RFC Patch V1 22/30] mm, of: " Jiang Liu
2014-07-21 17:52 ` Nishanth Aravamudan
2014-07-28 13:30 ` Grant Likely
2014-07-28 19:26 ` Nishanth Aravamudan
2014-07-11 7:37 ` [RFC Patch V1 23/30] mm, x86: " Jiang Liu
2014-07-11 7:37 ` [RFC Patch V1 24/30] mm, x86/platform/uv: " Jiang Liu
2014-07-11 7:37 ` [RFC Patch V1 25/30] mm, x86, kvm: " Jiang Liu
2014-07-11 7:44 ` Paolo Bonzini
2014-07-11 7:37 ` [RFC Patch V1 26/30] mm, x86, perf: " Jiang Liu
2014-07-11 7:37 ` [RFC Patch V1 27/30] x86, numa: Kill useless code to improve code readability Jiang Liu
2014-07-11 7:37 ` [RFC Patch V1 28/30] mm: Update _mem_id_[] for every possible CPU when memory configuration changes Jiang Liu
2014-07-21 17:47 ` Nishanth Aravamudan
2014-07-23 8:16 ` Jiang Liu
2014-07-11 7:37 ` [RFC Patch V1 29/30] mm, x86: Enable memoryless node support to better support CPU/memory hotplug Jiang Liu
2014-07-24 23:26 ` Nishanth Aravamudan
2014-07-25 1:41 ` Jiang Liu
2014-07-11 7:37 ` [RFC Patch V1 30/30] x86, NUMA: Online node earlier when doing CPU hot-addition Jiang Liu
2014-07-24 23:30 ` Nishanth Aravamudan
2014-07-25 1:43 ` Jiang Liu
2014-07-25 1:44 ` Jiang Liu
2014-07-11 8:29 ` [RFC Patch V1 00/30] Enable memoryless node on x86 platforms Peter Zijlstra
2014-07-11 15:33 ` Greg KH
2014-07-11 20:02 ` Dave Hansen
2014-07-11 20:20 ` Andi Kleen
2014-07-11 20:51 ` Peter Zijlstra
2014-07-11 21:58 ` Andi Kleen
2014-07-15 1:18 ` David Rientjes
2014-07-11 23:51 ` H. Peter Anvin
2014-07-11 22:40 ` Jiri Kosina
2014-07-15 1:19 ` David Rientjes
2014-07-18 17:48 ` Nish Aravamudan
2014-07-21 17:23 ` Nishanth Aravamudan
2014-07-21 17:41 ` Tony Luck
2014-07-21 17:57 ` Nishanth Aravamudan
2014-07-23 8:20 ` Jiang Liu
2014-07-24 23:32 ` Nishanth Aravamudan
2014-07-25 1:50 ` Jiang Liu
2014-08-18 23:30 ` Nishanth Aravamudan
2014-07-21 20:06 ` Peter Zijlstra [this message]
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