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...;vb->cmd_stop) > > > + break; > > If there's any buffer after this one we might never get another > > callback. > > I think every used buffer can get the callback, because host takes from the > arrays one by one, and puts back each with a vq notify. It's probabky racy even in this case. Besides, host is free to do it in any way that's legal in spec. > > > > > + free_pages((unsigned long)buf, ARRAY_ALLOC_ORDER); > > > + } > > > +} > > > + > > > static int init_vqs(struct virtio_balloon *vb) > &g...

...;vb->cmd_stop) > > > + break; > > If there's any buffer after this one we might never get another > > callback. > > I think every used buffer can get the callback, because host takes from the > arrays one by one, and puts back each with a vq notify. It's probabky racy even in this case. Besides, host is free to do it in any way that's legal in spec. > > > > > + free_pages((unsigned long)buf, ARRAY_ALLOC_ORDER); > > > + } > > > +} > > > + > > > static int init_vqs(struct virtio_balloon *vb) > &g...

On Mon, Jun 25, 2018 at 08:05:10PM +0800, Wei Wang wrote: > Negotiation of the VIRTIO_BALLOON_F_FREE_PAGE_HINT feature indicates the > support of reporting hints of guest free pages to host via virtio-balloon. > > Host requests the guest to report free page hints by sending a new cmd id > to the guest via the free_page_report_cmd_id configuration register. > > As the first

On Mon, Jun 25, 2018 at 08:05:10PM +0800, Wei Wang wrote: > Negotiation of the VIRTIO_BALLOON_F_FREE_PAGE_HINT feature indicates the > support of reporting hints of guest free pages to host via virtio-balloon. > > Host requests the guest to report free page hints by sending a new cmd id > to the guest via the free_page_report_cmd_id configuration register. > > As the first