From: Scott Wood <scottwood@freescale.com>
To: Kumar Gala <galak@kernel.crashing.org>
Cc: linuxppc-dev list <linuxppc-dev@ozlabs.org>,
Surya Ravikiran <koduks@gmail.com>
Subject: Re: reg adjust_total_lowmem
Date: Fri, 26 Oct 2007 15:50:47 -0500 [thread overview]
Message-ID: <47225327.2070103@freescale.com> (raw)
In-Reply-To: <20071026194005.GA4571@loki.buserror.net>
Scott Wood wrote:
> On Fri, Oct 26, 2007 at 10:04:19AM -0500, Kumar Gala wrote:
>> The reason you have 192M is that lowmem is the total amount of memory
>> that can be covered by up to three CAM entries. In the case of
>> setting mem=252M that max that three CAM entries can cover is 192M (64
>> +64+64). You should be able to access the other 60M via HIGHMEM.
>
> Why doesn't it just use a 256M mapping, and not access the last 4M?
Not to mention, why highmem and not just normal TLB0 mappings for the
extra pages?
-Scott
next prev parent reply other threads:[~2007-10-26 20:52 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <4dd2a2ce0710252051pe83a943q48f52d148f5a9603@mail.gmail.com>
2007-10-26 15:04 ` reg adjust_total_lowmem Kumar Gala
2007-10-26 19:40 ` Scott Wood
2007-10-26 20:50 ` Scott Wood [this message]
2007-10-26 21:17 ` Kumar Gala
2007-10-26 21:27 ` Scott Wood
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