linux-kernel - Re: [PATCH] calgary: Increase the maximum PHB bus number

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Message-ID: <20100218183750.GL29604@tux1.beaverton.ibm.com>
Date:	Thu, 18 Feb 2010 10:37:50 -0800
From:	"Darrick J. Wong" <djwong@...ibm.com>
To:	Muli Ben-Yehuda <muli@...ibm.com>
Cc:	Ingo Molnar <mingo@...e.hu>, "Jon D. Mason" <jdmason@...zu.us>,
	discuss@...-64.org, Corinna Schultz <coschult@...ibm.com>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] calgary: Increase the maximum PHB bus number

On Wed, Dec 09, 2009 at 11:03:46AM +0200, Muli Ben-Yehuda wrote:
> On Tue, Dec 08, 2009 at 04:59:01PM -0800, Darrick J. Wong wrote:
> 
> > -#define MAX_NUM_OF_PHBS		8 /* how many PHBs in total? */
> > -#define MAX_NUM_CHASSIS		8 /* max number of chassis */
> > -/* MAX_PHB_BUS_NUM is the maximal possible dev->bus->number */
> > -#define MAX_PHB_BUS_NUM		(MAX_NUM_OF_PHBS * MAX_NUM_CHASSIS * 2)
> > +/*
> > +   The maximum PHB bus number.
> > +   x3950M2 (rare): 8 chassis, 48 PHBs per chassis = 384
> > +   x3950M2: 4 chassis, 48 PHBs per chassis        = 192
> > +   x3950 (PCIE): 8 chassis, 32 PHBs per chassis   = 256
> > +   x3950 (PCIX): 8 chassis, 16 PHBs per chassis   = 128
> > +*/
> > +#define MAX_PHB_BUS_NUM		384
> > +
> >  #define PHBS_PER_CALGARY	4
> 
> We'll end up wasting a few bytes on small systems, but I don't think
> it's enough to matter on these fairly large systems. As far as I'm
> concerned, patch is fine.
> 
> Acked-by: Muli Ben-Yehuda <muli@...ibm.com>

Hmm... has this patch been queued up by anyone for the .34 merge window?

--D
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