From: Tejun Heo <tj@kernel.org>
To: Ingo Molnar <mingo@elte.hu>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
Brian Gerst <brgerst@gmail.com>,
x86@kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] x86-32: Allocate irq stacks seperate from percpu area
Date: Wed, 27 Oct 2010 17:40:09 +0200 [thread overview]
Message-ID: <4CC847D9.3080805@kernel.org> (raw)
In-Reply-To: <20101027153331.GA21789@elte.hu>
Hello, Ingo, Linus.
On 10/27/2010 05:33 PM, Ingo Molnar wrote:
> Btw., the NUMA stuff never really worked percpu alloc, as per Eric's observation:
Oh, it works in general. In this case, it's probably because the NUMA
configuration is rather weird in 32bit (but then again NUMA on 32bit
is supposed to be so). I think it's just 32bit init code setting up
early_cpu_to_node() differently.
> | Anyway, I just discovered per_cpu data on my machine (NUMA capable) all sit on a
> | single node, if 32bit kernel used.
>
> ... and in practice it's not really relevant on 32-bit anyway. So we can decouple
> the two issues just fine.
Yeah, the two issues are separate and as I wrote in the other message
the end result is correct (as much as it could be). I'll try to dig
down what exactly is going on but I don't think there's anything to be
alarmed about.
Thanks.
--
tejun
next prev parent reply other threads:[~2010-10-27 15:40 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-25 22:41 [PATCH] MN10300: Fix the PERCPU() alignment to allow for workqueues David Howells
2010-10-26 9:10 ` Tejun Heo
2010-10-26 10:22 ` David Howells
2010-10-26 12:14 ` Tejun Heo
2010-10-26 12:27 ` Tejun Heo
2010-10-26 12:45 ` [PATCH] x86, percpu: revert commit fe8e0c25 Tejun Heo
2010-10-26 13:25 ` Ingo Molnar
2010-10-26 13:34 ` Tejun Heo
2010-10-26 13:49 ` Brian Gerst
2010-10-26 15:08 ` Linus Torvalds
2010-10-27 5:43 ` [PATCH] x86-32: Allocate irq stacks seperate from percpu area Brian Gerst
2010-10-27 6:07 ` Eric Dumazet
2010-10-27 9:57 ` Peter Zijlstra
2010-10-27 13:33 ` Eric Dumazet
2010-10-27 13:42 ` Tejun Heo
2010-10-27 13:57 ` Eric Dumazet
2010-10-27 14:00 ` Tejun Heo
2010-10-27 14:24 ` Eric Dumazet
2010-10-27 14:39 ` Tejun Heo
2010-10-27 14:39 ` Eric Dumazet
2010-10-27 14:43 ` Tejun Heo
2010-10-27 15:21 ` Eric Dumazet
2010-10-27 15:35 ` Tejun Heo
2010-10-27 16:07 ` Eric Dumazet
2010-10-27 17:33 ` [PATCH] numa: fix slab_node(MPOL_BIND) Eric Dumazet
2010-10-28 15:59 ` Linus Torvalds
2010-10-28 16:27 ` Eric Dumazet
2010-10-28 16:45 ` Mel Gorman
2010-10-28 16:55 ` Christoph Lameter
2010-10-28 21:07 ` Andrew Morton
2010-10-29 14:55 ` Christoph Lameter
2010-10-27 20:55 ` [PATCH] x86-32: Allocate irq stacks seperate from percpu area Eric Dumazet
2010-10-28 12:01 ` Tejun Heo
2010-10-28 12:30 ` Eric Dumazet
2010-10-28 14:40 ` [PATCH] x86-32: NUMA irq stacks allocations Eric Dumazet
2010-10-29 6:43 ` [tip:x86/urgent] x86-32: Restore irq stacks NUMA-aware allocations tip-bot for Eric Dumazet
2010-10-29 18:32 ` Peter Zijlstra
2010-10-29 20:09 ` Cyrill Gorcunov
2010-10-29 20:28 ` Cyrill Gorcunov
2010-10-29 20:53 ` Eric Dumazet
2010-10-29 20:59 ` Cyrill Gorcunov
2010-10-29 20:58 ` Eric Dumazet
2010-10-29 21:21 ` Cyrill Gorcunov
2010-10-27 15:19 ` [PATCH] x86-32: Allocate irq stacks seperate from percpu area Linus Torvalds
2010-10-27 15:30 ` Ingo Molnar
2010-10-27 15:33 ` Ingo Molnar
2010-10-27 15:40 ` Tejun Heo [this message]
2010-10-27 15:43 ` Ingo Molnar
2010-10-27 16:03 ` [tip:x86/urgent] " tip-bot for Brian Gerst
2010-10-27 16:04 ` [tip:x86/urgent] percpu: Remove the multi-page alignment facility tip-bot for Ingo Molnar
2010-10-26 14:06 ` [RFC PATCH] percpu: always align percpu output section to PAGE_SIZE Tejun Heo
2011-03-24 6:46 ` [Uclinux-dist-devel] " Mike Frysinger
2011-03-24 6:46 ` Mike Frysinger
2011-03-24 8:25 ` Tejun Heo
2011-03-24 8:25 ` Tejun Heo
2011-03-24 8:51 ` Tejun Heo
2011-03-24 8:51 ` Tejun Heo
2011-03-24 13:46 ` Mike Frysinger
2011-03-24 13:46 ` Mike Frysinger
2011-03-24 17:51 ` Tejun Heo
2011-03-24 8:54 ` [PATCH UPDATED] " Tejun Heo
2010-10-26 14:50 ` [PATCH] MN10300: Fix the PERCPU() alignment to allow for workqueues David Howells
2010-10-26 14:56 ` Tejun Heo
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