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From: Alex Zeffertt <ajz@cambridgebroadband.com>
To: Phil.Nitschke@avalon.com.au
Cc: linuxppc-embedded@ozlabs.org
Subject: Re: ioremap() fails for >64 MB
Date: Tue, 22 Aug 2006 09:50:53 +0100	[thread overview]
Message-ID: <44EAC56D.5020508@cambridgebroadband.com> (raw)
In-Reply-To: <1156232469.26041.19.camel@caxton.int.avalon.com.au>

Phil Nitschke wrote:
> Hi all,
> 
> I have 2 GB memory on a 7448 processor, and want to reserve a huge chunk
> of it at boot-time, then ioremap() it into the kernel space inside a
> device driver.  So far I've succeeded with 64 MB, but can't go any
> higher, as mm/vmalloc.c tells me: "allocation failed: out of vmalloc
> space - use vmalloc=<size> to increase size."
> 

I remember reading in Linux Device Drivers that you can use the bigphysarea
patch to allocate large memory, as long as you do it at boot time.  It seems
it's been ported to 2.6 too:

	http://lwn.net/Articles/111132/

Alex

  reply	other threads:[~2006-08-22  8:51 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-08-22  7:41 ioremap() fails for >64 MB Phil Nitschke
2006-08-22  8:50 ` Alex Zeffertt [this message]
2006-08-22 21:05   ` David H. Lynch Jr.
2006-08-23 14:05     ` Matt Porter
2006-08-22 14:22 ` Matt Porter
2006-08-23 10:00   ` Phil Nitschke
2006-08-23 11:51     ` Dan Malek
2006-08-24  2:54     ` alva
2006-08-24 12:25       ` Matt Porter
2006-08-24 12:56     ` Matt Porter

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