From: Michael Ellerman <michael@ellerman.id.au>
To: Adrian Cox <adrian@humboldt.co.uk>
Cc: "linuxppc-dev@ozlabs.org" <linuxppc-dev@ozlabs.org>
Subject: Re: SMP in 32-bit arch/powerpc
Date: Wed, 02 Aug 2006 19:08:20 +1000 [thread overview]
Message-ID: <1154509700.26242.11.camel@localhost.localdomain> (raw)
In-Reply-To: <1154507145.24203.0.camel@localhost.localdomain>
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On Wed, 2006-08-02 at 09:25 +0100, Adrian Cox wrote:
> Is anybody else having problems with 32-bit SMP support in arch/powerpc?
> I'm using 2.6.17 as my current base, because I've not yet merged the
> latest mpic changes.
>
> I'm currently bringing up a dual-7448 board, and when I build the kernel
> with CONFIG_SMP, the bootmem allocator corrupts the device tree. The
> strange thing is, this still happens when I don't start the second CPU.
> Kernels built without CONFIG_SMP run flawlessly on the same hardware.
Seems to be working OK here:
fuego:~# uname -a
Linux fuego 2.6.17 #1 SMP Mon Jul 3 12:10:43 EST 2006 ppc GNU/Linux
fuego:~# cat /proc/cpuinfo
processor : 0
cpu : 604r
clock : 332.000000MHz
revision : 49.2 (pvr 0009 3102)
bogomips : 82.68
processor : 1
cpu : 604r
clock : 332.000000MHz
revision : 49.2 (pvr 0009 3102)
bogomips : 82.68
processor : 2
cpu : 604r
clock : 332.000000MHz
revision : 49.2 (pvr 0009 3102)
bogomips : 82.68
processor : 3
cpu : 604r
clock : 332.000000MHz
revision : 49.2 (pvr 0009 3102)
bogomips : 82.68
total bogomips : 330.75
timebase : 41500582
platform : CHRP
machine : CHRP IBM,7025-F50
cheers
--
Michael Ellerman
IBM OzLabs
wwweb: http://michael.ellerman.id.au
phone: +61 2 6212 1183 (tie line 70 21183)
We do not inherit the earth from our ancestors,
we borrow it from our children. - S.M.A.R.T Person
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next prev parent reply other threads:[~2006-08-02 9:08 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-02 8:25 SMP in 32-bit arch/powerpc Adrian Cox
2006-08-02 9:08 ` Michael Ellerman [this message]
2006-08-02 9:27 ` Zhang Wei-r63237
2006-08-02 13:32 ` Kumar Gala
2006-08-02 19:36 ` Adrian Cox
2006-08-02 14:42 ` Jon Loeliger
2006-08-16 23:12 ` Benjamin Herrenschmidt
2006-08-17 7:19 ` Adrian Cox
2006-08-17 7:45 ` Benjamin Herrenschmidt
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