[PATCH 5/6] Have ia64 use add_active_range() and free_area_init_nodes

Mel Gorman mel at csn.ul.ie
Sat May 20 00:03:10 EST 2006

On Sun, 14 May 2006, Andrew Morton wrote:

> Mel Gorman <mel at csn.ul.ie> wrote:
>> Size zones and holes in an architecture independent manner for ia64.
> This one makes my ia64 die very early in boot.   The trace is pretty useless.
> config at http://www.zip.com.au/~akpm/linux/patches/stuff/config-ia64

An indirect fix for this has been set out with a patchset with the subject 
"[PATCH 0/2] Fixes for node alignment and flatmem assumptions" . For 
arch-independent-zone-sizing, the issue was that FLATMEM assumes that 
NODE_DATA(0)->node_start_pfn == 0. This is not the case with 
arch-independent-zone-sizing and IA64. With arch-independent-zone-sizing, 
a nodes node_start_pfn will be at the first valid PFN.

> <log snipped>
> Note the misaligned pfns.

You will still get the message about misaligned PFNs on IA64. This is 
because the lowest zone starts at the lowest available PFN which may not 
be 0 or any other aligned number. It shouldn't make a different - or at 
least I couldn't cause any problems.

Mel Gorman
Part-time Phd Student                          Linux Technology Center
University of Limerick                         IBM Dublin Software Lab

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