linux-kernel - Ability to force the physical location of a kmalloc for testing purposes

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Message-Id: <65AA39D9-57A3-465E-847A-B1058783F370@kernel.crashing.org>
Date:	Tue, 16 Jun 2009 16:48:05 -0500
From:	Kumar Gala <galak@...nel.crashing.org>
To:	"linux-kernel@...r.kernel.org List" <linux-kernel@...r.kernel.org>
Subject: Ability to force the physical location of a kmalloc for testing purposes

We are trying to test some IO DMA code and want to make sure the  
physical address is in a given range for testing.  For example on  
PPC32 w/have 36-bit physical and some of IO devices are capable of  
DMAing to the full 36-bit address.  However we want to test things  
like making sure a physical address >4G works properly.

- k
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