Re: [Xen-devel] [PATCH v3 12/20] xen/balloon: Don't rely on the page granularity is the same for Xen and Linux

[Julien Grall <julien.grall@xxxxxxxxxx>]

On 10/08/15 13:55, Stefano Stabellini wrote:
>> If your only concern is the size of the array, we could decrease the
>> number of frames by batch. Or allocation the variable once a boot time.
> 
> Yes, that is my only concern. Allocating only nr_pages new struct page*
> would be good enough I guess.

That would be even worst. We shouldn't allocate the array at every call,
but at boot time.

Note that frame_list is already a static variable use 64KB when 64KB
page is used. I guess this will be unlikely to remove that much frame in
a single batch. But I will keep this optimization for later.

Anyway, I'm wondering if we could re-use the lru field to link the page
when allocate them and retrieve in the second loop in order to avoid the
pages array.

Regards,

-- 
Julien Grall

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