From: Tejun Heo <tj@kernel.org>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
Brian Gerst <brgerst@gmail.com>,
x86@kernel.org, linux-kernel@vger.kernel.org,
torvalds@linux-foundation.org, mingo@elte.hu
Subject: Re: [PATCH] x86-32: Allocate irq stacks seperate from percpu area
Date: Wed, 27 Oct 2010 16:00:07 +0200 [thread overview]
Message-ID: <4CC83067.5000009@kernel.org> (raw)
In-Reply-To: <1288187870.2709.128.camel@edumazet-laptop>
On 10/27/2010 03:57 PM, Eric Dumazet wrote:
>> What does cpu_to_node() on each cpu say? Also, do you know why
>> num_possible_cpus() is 32, not 16?
>>
>
> I dont know, machine is HP ProLiant BL460c G6
> [ 0.000000] SMP: Allowing 32 CPUs, 16 hotplug CPUs
>
> for_each_possible_cpu(cpu) {
> pr_err("cpu=%d node=%d\n", cpu, cpu_to_node(cpu));
> }
>
> cpu=0 node=1
> cpu=1 node=0
> cpu=2 node=1
> cpu=3 node=0
> cpu=4 node=1
> cpu=5 node=0
> cpu=6 node=1
> cpu=7 node=0
> cpu=8 node=1
> cpu=9 node=0
> cpu=10 node=1
> cpu=11 node=0
> cpu=12 node=1
> cpu=13 node=0
> cpu=14 node=1
> cpu=15 node=0
> cpu=16 node=0
> cpu=17 node=0
> cpu=18 node=0
> cpu=19 node=0
> cpu=20 node=0
> cpu=21 node=0
> cpu=22 node=0
> cpu=23 node=0
> cpu=24 node=0
> cpu=25 node=0
> cpu=26 node=0
> cpu=27 node=0
> cpu=28 node=0
> cpu=29 node=0
> cpu=30 node=0
> cpu=31 node=0
Heh, interesting table. What does the same code say on 64bit? Is it
the same?
--
tejun
next prev parent reply other threads:[~2010-10-27 14:01 UTC|newest]
Thread overview: 59+ 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 [this message]
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
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 8:25 ` Tejun Heo
2011-03-24 8:51 ` Tejun Heo
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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