Re: [RFC] pearing off zone from physical memory layout [0/10]

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

Dave Hansen wrote:
> On Fri, 2006-02-03 at 16:35 +0900, KAMEZAWA Hiroyuki wrote:
>> This series of patches remove members from zone, which depends on physical
>> memory layout, zone_start_pfn, spanned_pages, zone_mem_map against 2.6.16-rc1.
>>
>> By this, zone's meaning will be changed from "a range of memory to be used
>> in a same manner" to "a group of memory to be used in a same manner".
> 
> This looks like pretty good stuff.  I especially like that it gets rid
> of that seqlock that I had to add for memory hotplug.  My only concern
> would be in the increased page_to_pfn() overhead.  Any data on that?
> 

I don't have any data, because I don't have a NUMA environment which needs this.
My x86 box is not NUMA and IA64 uses vmem_map, doesn't access zone->zone_mem_map.

Archs which needs test are alpha, arm, m32r, i386, parisc, x86_64.
(powerpc doesn't have DISCONTIGMEM config)

To make codes clean before asking test, I posted unify_pfn_to_page patch to lkml.
(I'll have to rewrite and repost it..)
After it goes, I'll post renewed patch as request-for-test.


sorry for Bad e-mail subject :(
Thanks,
-- Kame




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