From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Rune Torgersen <runet@innovsys.com>
Cc: linuxppc-dev@ozlabs.org
Subject: Re: 1 GB lowmem
Date: Wed, 21 May 2008 17:24:38 -0400 [thread overview]
Message-ID: <1211405078.8297.258.camel@pasglop> (raw)
In-Reply-To: <DCEAAC0833DD314AB0B58112AD99B93B046E79B3@ismail.innsys.innovsys.com>
On Wed, 2008-05-21 at 13:00 -0500, Rune Torgersen wrote:
> Hi
>
> I am trying to enable 1 GB of lowmem on a Freescale 8280.
> In arch/ppc this was easilly done by:
> CONFIG_ADVANCED_OPTIONS=y
> CONFIG_HIGHMEM_START=0xfe000000
> CONFIG_LOWMEM_SIZE_BOOL=y
> CONFIG_LOWMEM_SIZE=0x40000000
> CONFIG_KERNEL_START_BOOL=y
> CONFIG_KERNEL_START=0xa0000000
>
> This does not work in arch/powerpc. CPU hangs as soon as init starts.
> Any ideas what to look at, what to change?
You probably need to lower TASK_SIZE too.
> The reason I want to do this is because I cannot get highmem support to
> work when using CONFIG_PREEMPT_RT.
> (hitting a bug_on in kmap_atomic)
We should look into fixing that :-)
Ben.
prev parent reply other threads:[~2008-05-21 21:25 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-21 18:00 1 GB lowmem Rune Torgersen
2008-05-21 20:00 ` Rune Torgersen
2008-05-21 20:55 ` Rune Torgersen
2008-05-21 21:12 ` Kumar Gala
2008-05-21 21:24 ` Rune Torgersen
2008-05-22 4:13 ` Kumar Gala
2008-05-22 14:13 ` Rune Torgersen
2008-05-22 15:17 ` Rune Torgersen
2008-05-21 21:24 ` Benjamin Herrenschmidt [this message]
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