Re: mm: introduce new field "managed_pages" to struct zone

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On 03/03/2013 01:01 PM, Ric Mason wrote:
> On 02/28/2013 02:13 PM, Simon Jeons wrote:
>> Hi Jiang,
>>
>> https://patchwork.kernel.org/patch/1781291/
>>
>> You said that the bootmem allocator doesn't touch *highmem pages*, so highmem zones' managed_pages is set to the accurate value "spanned_pages - absent_pages" in function free_area_init_core() and won't be updated anymore. Why it doesn't touch *highmem pages*? Could you point out where you figure out this?
> 
> Yeah, why bootmem doesn't touch highmem pages? The patch is buggy. :(
> 
Actually I found that assumption may be wrong for some architectures, and I'm
working on a patchset to clean it up. BTW, what's the issue with that patch?
Regards!
Gerry

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