Re: [Xen-devel] struct page_info

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 24/04/2009 08:21, "Cihula, Joseph" <joseph.cihula@xxxxxxxxx> wrote:

>>> Also, if "Page is on a free list:", I assume one of the PGC_ fields would
>>> be set?
>> 
>> Not would, but might.
> 
> Would:
>         ((page->count_info & PGC_count_mask) != 0 || page->count_info == 0)
> definitively indicate if a page was in use?

Only PGC_broken|PGC_offlined may be set for a free page. Most free pages
have count_info==0.

 -- Keir



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