Re: [PATCH 0/4] V4 ia64 SPARSEMEM

From: Bob Picco <>
Date: 2005-09-28 00:09:20
luck wrote:	[Mon Sep 26 2005, 08:03:09PM EDT]
> >I'm assuming you refer to the config changes in arch/ia64/Kconfig. Well the
> >new ones are documented in mm/Kconfig.  If that documentation is inadequate,
> >then I can attempt to supply more.
> There aren't any words in there about why I might want to use
> sparsemem ... just a standard version of if you don't know what
> to pick, go with the old discontig stuff.
I can't say there is disagreement with this point. So you'd obviously like
more help text in mm/Kconfig?
> >Should you think we won't get sufficient test converage without some default
> >configuration files, then I'd suggest the two mentioned about be introduced.
> This is definitely the prime issue ... config space on ia64
> is already very fragmented, so testting of some combination
> of options is rare to non-existant.  If SPARSEMEM isn't turned
> on, then it won't be used by anyone that isn't already reading
> the lhms list.  Coupled with the lack of sales pitch in the
> Kconfig help files, it looks like this isn't going to be used
> by anyone!
Yep. I thought this is what you are after.
> >Long term should SPARSEMEM become the default and DISCONTIG+VIRTUAL_MEM_MAP
> >be obsoleted then we could remove the config files.
> If benchmarks show no difference, then I'll consolidate the
> configuration options.  I still think that VIRTUAL_MEM_MAP
> has a great deal of elegance to it ... auto-sizing to just
> about any degree of sparseness, but I think we need to
> simplify.
Well I'm not attempting to be critical of VIRTUAL_MEM_MAP. Obviously it 
satisfies a solution which was previously unanswered. I'm just hoping to reduce
our configuration options.  We aren't even remotely close to possibly
considering this.
The bigsur problem isn't nodedata.h related. It's in arch/ia64/Kconfig which
figures. I should have this resolved some time today after checking
the default configs.
> -Tony
> -
To unsubscribe from this list: send the line "unsubscribe linux-ia64" in
the body of a message to
More majordomo info at
Received on Wed Sep 28 00:08:00 2005

This archive was generated by hypermail 2.1.8 : 2005-09-28 00:08:07 EST