From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
To: Andi Kleen <andi@firstfloor.org>
Cc: Christoph Lameter <cl@linux-foundation.org>,
David Rientjes <rientjes@google.com>,
Pekka Enberg <penberg@cs.helsinki.fi>,
Nick Piggin <npiggin@suse.de>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
haicheng.li@intel.com
Subject: Re: [PATCH] [4/4] SLAB: Fix node add timer race in cache_reap
Date: Mon, 1 Mar 2010 10:59:32 +0900 [thread overview]
Message-ID: <20100301105932.5db60c93.kamezawa.hiroyu@jp.fujitsu.com> (raw)
In-Reply-To: <20100226173115.GG16335@basil.fritz.box>
On Fri, 26 Feb 2010 18:31:15 +0100
Andi Kleen <andi@firstfloor.org> wrote:
> On Fri, Feb 26, 2010 at 11:24:50AM -0600, Christoph Lameter wrote:
> > On Fri, 26 Feb 2010, Andi Kleen wrote:
> >
> > > > > Memory hotplug with node add never quite worked on x86 before,
> > > > > for various reasons not related to slab.
> > > >
> > > > Ok but why did things break in such a big way?
> > >
> > > 1) numa memory hotadd never worked
> >
> > Well Kamesan indicated that this worked if a cpu became online.
>
> I mean in the general case. There were tons of problems all over.
>
Then, it's cpu hotplug matter, not memory hotplug.
cpu hotplug callback should prepaare
l3 = searchp->nodelists[node];
BUG_ON(!l3);
before onlined. Rather than taking care of races.
Thanks,
-Kame
WARNING: multiple messages have this Message-ID (diff)
From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
To: Andi Kleen <andi@firstfloor.org>
Cc: Christoph Lameter <cl@linux-foundation.org>,
David Rientjes <rientjes@google.com>,
Pekka Enberg <penberg@cs.helsinki.fi>,
Nick Piggin <npiggin@suse.de>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
haicheng.li@intel.com
Subject: Re: [PATCH] [4/4] SLAB: Fix node add timer race in cache_reap
Date: Mon, 1 Mar 2010 10:59:32 +0900 [thread overview]
Message-ID: <20100301105932.5db60c93.kamezawa.hiroyu@jp.fujitsu.com> (raw)
In-Reply-To: <20100226173115.GG16335@basil.fritz.box>
On Fri, 26 Feb 2010 18:31:15 +0100
Andi Kleen <andi@firstfloor.org> wrote:
> On Fri, Feb 26, 2010 at 11:24:50AM -0600, Christoph Lameter wrote:
> > On Fri, 26 Feb 2010, Andi Kleen wrote:
> >
> > > > > Memory hotplug with node add never quite worked on x86 before,
> > > > > for various reasons not related to slab.
> > > >
> > > > Ok but why did things break in such a big way?
> > >
> > > 1) numa memory hotadd never worked
> >
> > Well Kamesan indicated that this worked if a cpu became online.
>
> I mean in the general case. There were tons of problems all over.
>
Then, it's cpu hotplug matter, not memory hotplug.
cpu hotplug callback should prepaare
l3 = searchp->nodelists[node];
BUG_ON(!l3);
before onlined. Rather than taking care of races.
Thanks,
-Kame
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next prev parent reply other threads:[~2010-03-01 2:03 UTC|newest]
Thread overview: 174+ 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 [this message]
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
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
-- strict thread matches above, loose matches on Subject: below --
2010-02-03 21:39 [PATCH] [0/4] SLAB: Fix a couple of slab memory hotadd issues Andi Kleen
2010-02-03 21:39 ` [PATCH] [4/4] SLAB: Fix node add timer race in cache_reap Andi Kleen
2010-02-03 21:39 ` Andi Kleen
2010-02-05 19:16 ` Christoph Lameter
2010-02-05 19:16 ` Christoph Lameter
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