From mboxrd@z Thu Jan  1 00:00:00 1970
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Subject: Re: [PATCH 3/3] ppc64-specific memory notifier support
From: Michael Ellerman <michael@ellerman.id.au>
To: Badari Pulavarty <pbadari@us.ibm.com>
In-Reply-To: <1204217166.28696.15.camel@dyn9047017100.beaverton.ibm.com>
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Date: Fri, 29 Feb 2008 11:11:15 +1100
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On Thu, 2008-02-28 at 08:46 -0800, Badari Pulavarty wrote:
> Hotplug memory notifier for ppc64. This gets invoked by writing
> the device-node that needs to be removed to /proc/ppc64/ofdt.
> We need to adjust the sections and remove sysfs entries by
> calling __remove_pages(). Then call arch specific code to
> get rid of htab mappings for the section of memory.
>=20
> Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com>
> ---
>  arch/powerpc/platforms/pseries/Makefile         |    1=20
>  arch/powerpc/platforms/pseries/hotplug-memory.c |   98 +++++++++++++++++=
+++++++
>  2 files changed, 99 insertions(+)
>=20
> Index: linux-2.6.25-rc2/arch/powerpc/platforms/pseries/hotplug-memory.c
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
> --- /dev/null	1970-01-01 00:00:00.000000000 +0000
> +++ linux-2.6.25-rc2/arch/powerpc/platforms/pseries/hotplug-memory.c	2008=
-02-28 08:20:14.000000000 -0800

> +
> +static struct notifier_block pseries_smp_nb =3D {
> +	.notifier_call =3D pseries_memory_notifier,
> +};
> +
> +static int __init pseries_memory_hotplug_init(void)
> +{
> +	if (firmware_has_feature(FW_FEATURE_LPAR))
> +		pSeries_reconfig_notifier_register(&pseries_smp_nb);
> +
> +	return 0;
> +}
> +arch_initcall(pseries_memory_hotplug_init);

This is going to fire on non-pseries LPAR platforms, like iSeries and
PS3. Which is not what you want I think.

cheers

--=20
Michael Ellerman
OzLabs, IBM Australia Development Lab

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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