Messages in this thread | | | Date | Mon, 31 Jul 2017 20:36:09 +0800 | From | Wei Wang <> | Subject | Re: [PATCH v12 5/8] virtio-balloon: VIRTIO_BALLOON_F_SG |
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On 07/31/2017 12:20 AM, Michael S. Tsirkin wrote: > On Sun, Jul 30, 2017 at 07:18:33PM +0300, Michael S. Tsirkin wrote: >> On Sun, Jul 30, 2017 at 05:59:17AM +0000, Wang, Wei W wrote: >> That's a hypervisor implementation detail. From guest point of view, >> discarding contents can not be distinguished from writing old contents. >> > Besides, ignoring the free page tricks, consider regular ballooning. > We map page with DONTNEED then back with WILLNEED. Result is > getting a zero page. So at least one of deflate/inflate should be input. > I'd say both for symmetry. >
OK, I see the point. Thanks.
Best, Wei
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