Re: [PATCH] Allow PAGE_OWNER to be set on any architecture

From: Christoph Lameter
Date: Fri Jun 08 2007 - 11:36:53 EST

On Fri, 8 Jun 2007, Mel Gorman wrote:

> In situations where CONFIG_HOLES_IN_ZONES is set (IA64 with VIRTUAL_MEM_MAP),
> there may be cases where pages allocated within a MAX_ORDER_NR_PAGES block
> of pages may not be displayed in /proc/page_owner if the hole is at the
> start of the block. Addressing this would be quite complex, perform slowly
> and is of no clear benefit.

Note that CONFIG_HOLES_IN_ZONES and IA64 VIRTUAL_MEM_MAP may be going
away. Andy Whitcroft has a patchset that implements virtual memmap
support under sparse and that would allow us to get rid of this.

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