Displaying 5 results from an estimated 5 matches for "virtio_balloon_f_cont_pages".
2020 Jul 16
0
[RFC for Linux v4 1/2] virtio_balloon: Add VIRTIO_BALLOON_F_CONT_PAGES and inflate_cont_vq
...e/uapi/linux/virtio_balloon.h
> @@ -37,6 +37,7 @@
> #define VIRTIO_BALLOON_F_FREE_PAGE_HINT 3 /* VQ to report free pages */
> #define VIRTIO_BALLOON_F_PAGE_POISON 4 /* Guest is using page poisoning */
> #define VIRTIO_BALLOON_F_REPORTING 5 /* Page reporting virtqueue */
> +#define VIRTIO_BALLOON_F_CONT_PAGES 6 /* VQ to report continuous pages */
>
> /* Size of a PFN in the balloon interface. */
> #define VIRTIO_BALLOON_PFN_SHIFT 12
So how does the guest/host interface look like?
Could you write up something about it?
2020 Jul 16
0
[RFC for Linux v4 0/2] virtio_balloon: Add VIRTIO_BALLOON_F_CONT_PAGES to report continuous pages
...deflate
> continuous pages.
> 2. According to the comments from David in [6], added 2 new vqs inflate_cont_vq
> and deflate_cont_vq to report continuous pages with format 32 bits pfn and 32
> bits size.
> Following is the introduction of the function.
> These patches add VIRTIO_BALLOON_F_CONT_PAGES to virtio_balloon. With this
> flag, balloon tries to use continuous pages to inflate and deflate.
> Opening this flag can bring two benefits:
> 1. Report continuous pages will increase memory report size of each time
> call tell_host. Then it will increase the speed of balloon infl...
2020 May 13
0
[RFC v3 for QEMU] virtio-balloon: Add option cont-pages to set VIRTIO_BALLOON_VQ_INFLATE_CONT
...ic size_t virtio_balloon_config_size(VirtIOBalloon *s)
> if (s->qemu_4_0_config_size) {
> return sizeof(struct virtio_balloon_config);
> }
> - if (virtio_has_feature(features, VIRTIO_BALLOON_F_PAGE_POISON)) {
> + if (virtio_has_feature(s->host_features, VIRTIO_BALLOON_F_CONT_PAGES)) {
> return sizeof(struct virtio_balloon_config);
> }
> + if (virtio_has_feature(features, VIRTIO_BALLOON_F_PAGE_POISON)) {
> + return offsetof(struct virtio_balloon_config, current_pages_order);
> + }
> if (virtio_has_feature(features, VIRTIO_BALL...
2020 Jul 16
0
[virtio-dev] [RFC for Linux v4 0/2] virtio_balloon: Add VIRTIO_BALLOON_F_CONT_PAGES to report continuous pages
...;> 2. According to the comments from David in [6], added 2 new vqs inflate_cont_vq
> >> and deflate_cont_vq to report continuous pages with format 32 bits pfn and 32
> >> bits size.
> >> Following is the introduction of the function.
> >> These patches add VIRTIO_BALLOON_F_CONT_PAGES to virtio_balloon. With this
> >> flag, balloon tries to use continuous pages to inflate and deflate.
> >> Opening this flag can bring two benefits:
> >> 1. Report continuous pages will increase memory report size of each time
> >> call tell_host. Then it will...
2020 Jul 16
0
[RFC for qemu v4 2/2] virtio_balloon: Add dcvq to deflate continuous pages
On Thu, Jul 16, 2020 at 10:41:55AM +0800, Hui Zhu wrote:
> This commit adds a vq dcvq to deflate continuous pages.
> When VIRTIO_BALLOON_F_CONT_PAGES is set, try to get continuous pages
> from icvq and use madvise MADV_WILLNEED with the pages.
>
> Signed-off-by: Hui Zhu <teawaterz at linux.alibaba.com>
This is arguably something to benchmark. Does guest benefit
from MADV_WILLNEED or loose performance?
> ---
> hw/virtio/v...