From: "Jeffery Bahr" <jbahr@set-software-services.com>
To: "'Arnd Bergmann'" <arnd@arndb.de>, <linuxppc-dev@ozlabs.org>
Subject: RE: Discontiguous Memory
Date: Fri, 15 Sep 2006 17:31:13 -0600 [thread overview]
Message-ID: <0fa201c6d91f$087ed060$3900a8c0@headquarters.setsoftwareservices.com> (raw)
In-Reply-To: <200609160124.57280.arnd@arndb.de>
Thanks, Arnd. As we're running a 32-bit 8548, looks like we might not be
able to enable sparse memory maps.
Good thought, though.
J
-----Original Message-----
From: Arnd Bergmann [mailto:arnd@arndb.de]
Sent: Friday, September 15, 2006 5:25 PM
To: linuxppc-dev@ozlabs.org
Cc: jbahr
Subject: Re: Discontiguous Memory
Am Friday 15 September 2006 22:22 schrieb jbahr:
> Are this really a problem or is there kernel provision for the PPC for
> discontiguous real memory DRAM space?
>
> Any comments would be VERY appreciated.
You probably want to enable the CONFIG_ARCH_SPARSEMEM_ENABLE option, which
is currently dependant on CONFIG_PPC64.
Look in the early_init_dt_scan_memory function (arch/powerpc/kernel/prom.c)
for how to layout the "memory" nodes in your device tree.
Arnd <><
next prev parent reply other threads:[~2006-09-15 23:38 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-15 20:22 Discontiguous Memory jbahr
2006-09-15 23:24 ` Arnd Bergmann
2006-09-15 23:31 ` Jeffery Bahr [this message]
2006-09-16 0:56 ` Benjamin Herrenschmidt
2006-09-16 9:51 ` Arnd Bergmann
2006-09-16 22:50 ` Benjamin Herrenschmidt
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