linux-kernel - Re: [PATCH 09/10] ppc64: Convert cpu_sibling_map to a per

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Date:	Mon, 17 Sep 2007 16:28:31 +1000
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	travis@....com
Cc:	Andrew Morton <akpm@...ux-foundation.org>, Andi Kleen <ak@...e.de>,
	Christoph Lameter <clameter@....com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, linuxppc-dev@...abs.org,
	sparclinux@...r.kernel.org
Subject: Re: [PATCH 09/10] ppc64: Convert cpu_sibling_map to a per_cpu data
 array (v3)

On Tue, 11 Sep 2007 18:56:53 -0700 travis@....com wrote:
>
> Convert cpu_sibling_map to a per_cpu cpumask_t array for the ppc64
> architecture.  This fixes build errors in block/blktrace.c and
> kernel/sched.c when CONFIG_SCHED_SMT is defined.
> 
> Note: these changes have not been built nor tested.

After applying all 10 patches, the ppc64_defconfig builds but:

	vmlinux is larger:

   text    data     bss     dec     hex filename
7705776 1756984  504624 9967384  981718 ppc64/vmlinux
7706228 1757120  504624 9967972  981964 trav.bld/vmlinux

	the topology (on my POWERPC5+ box) is not correct:

cpu0/topology/thread_siblings:0000000f
cpu1/topology/thread_siblings:0000000f
cpu2/topology/thread_siblings:0000000f
cpu3/topology/thread_siblings:0000000f

it used to be:

cpu0/topology/thread_siblings:00000003
cpu1/topology/thread_siblings:00000003
cpu2/topology/thread_siblings:0000000c
cpu3/topology/thread_siblings:0000000c

Similarly on my iSeries box, the topology is displayed as above
while it used to be:

cpu0/topology/thread_siblings:00000001
cpu1/topology/thread_siblings:00000002
cpu2/topology/thread_siblings:00000004
cpu3/topology/thread_siblings:00000008

-- 
Cheers,
Stephen Rothwell                    sfr@...b.auug.org.au
http://www.canb.auug.org.au/~sfr/

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