linux-kernel - Re: [PATCH] [POWERPC] Fix initial lmb add region with a non-zero base

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Message-Id: <20080213.143359.258873954.davem@davemloft.net>
Date:	Wed, 13 Feb 2008 14:33:59 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	galak@...nel.crashing.org
Cc:	linuxppc-dev@...abs.org, linux-kernel@...r.kernel.org,
	sparclinux@...r.kernel.org
Subject: Re: [PATCH] [POWERPC] Fix initial lmb add region with a non-zero
 base

From: Kumar Gala <galak@...nel.crashing.org>
Date: Wed, 13 Feb 2008 07:37:27 -0600 (CST)

> If we add to an empty lmb region with a non-zero base we will not coalesce
> the number of regions done to one.  This causes problems on ppc32 for the
> memory region as its assumed to only have one region.
> 
> We can fix this be easily specially casing the initial add to just replace
> the dummy region.
> 
> ---
> 
> Posting this since Dave's looking a pulling the lmb code out into lib/ and
> sharing it between powerpc and sparc.
> 
> (this is my git tree git.kernel.org:/pub/scm/linux/kernel/git/galak/powerpc.git)

I noticed this issue when I use lmb on sparc64 and I intended to bring
it up eventually.  Thanks for fixing it!
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