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Re: [Xen-devel] [PATCH 2/2] xen: spread page scrubbing across all idle CPU

>>> On 11.06.14 at 12:13, <George.Dunlap@xxxxxxxxxxxxx> wrote:
> Would it make more sense to do something like the following:
> * Have a "clean" freelist and a "dirty" freelist
> * When destroying a domain, simply move pages to the dirty freelist
> * Have idle vcpus scrub the dirty freelist before going to sleep
>  - ...and wake up idle vcpus to do some scrubbing when adding pages to
> the dirty freelist
> * In alloc_domheap_pages():
>  - If there are pages on the "clean" freelist, allocate them
>  - If there are no pages on the "clean" freelist but there are on the
> "dirty" freelist, scrub pages from the "dirty" freelist synchronously.

Yes, that's the model I suggested weeks ago.


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