Re: [RFC] Removing page->flags

[KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>]

Magnus Damm wrote:
> Hi Kamezawa-san,
> 
> On 2/9/06, KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> wrote:
>> Magnus Damm wrote:
>>> [RFC] Removing page-flags
>>>
>>> Moving type A bits:
>>>
>>> Instead of keeping the bits together, we spread them out and store a
>>> pointer to them from pg_data_t.
>>>
>> This will annoy people who has a job to look into crash-dump's vmcore..like me ;)
>> so, I don't like this idea.
> 
> Hehe, gotcha. =) I also wonder how well it would work with your zone patches.
> 
My layout-free-zone patches are not affected by this if you use pgdat/section to
preserve page-flags.

To be honest, I'd like to do this
==
struct zone *page_zone(struct page *page)
{
	return page->zone;
}
==
But this increases size of memmap awfully ;( and I can't.
Current zone-indexing in page-flags is well saving memory space, I think.
-- Kame

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