Displaying 20 results from an estimated 317 matches for "deflate_vq".
2011 Jul 02
1
[PATCH] virtio_balloon: Notify guest only after deflating the balloon
...io_has_feature(vdev, VIRTIO_BALLOON_F_MUST_TELL_HOST);
- * is true, we *have* to do it in this order
+ * If the host doesn't require us to notify him before using
+ * pages which belong to the balloon, update him only after
+ * freeing those pages for guest use.
*/
- tell_host(vb, vb->deflate_vq);
- release_pages_by_pfn(vb->pfns, vb->num_pfns);
+ if (virtio_has_feature(vb->vdev, VIRTIO_BALLOON_F_MUST_TELL_HOST)) {
+ tell_host(vb, vb->deflate_vq);
+ release_pages_by_pfn(vb->pfns, vb->num_pfns);
+ } else {
+ release_pages_by_pfn(vb->pfns, vb->num_pfns);
+ tell_hos...
2011 Jul 02
1
[PATCH] virtio_balloon: Notify guest only after deflating the balloon
...io_has_feature(vdev, VIRTIO_BALLOON_F_MUST_TELL_HOST);
- * is true, we *have* to do it in this order
+ * If the host doesn't require us to notify him before using
+ * pages which belong to the balloon, update him only after
+ * freeing those pages for guest use.
*/
- tell_host(vb, vb->deflate_vq);
- release_pages_by_pfn(vb->pfns, vb->num_pfns);
+ if (virtio_has_feature(vb->vdev, VIRTIO_BALLOON_F_MUST_TELL_HOST)) {
+ tell_host(vb, vb->deflate_vq);
+ release_pages_by_pfn(vb->pfns, vb->num_pfns);
+ } else {
+ release_pages_by_pfn(vb->pfns, vb->num_pfns);
+ tell_hos...
2017 Dec 19
0
[PATCH v20 4/7] virtio-balloon: VIRTIO_BALLOON_F_SG
...es -= VIRTIO_BALLOON_PAGES_PER_PAGE;
}
@@ -234,13 +374,55 @@ static unsigned leak_balloon(struct virtio_balloon *vb, size_t num)
* virtio_has_feature(vdev, VIRTIO_BALLOON_F_MUST_TELL_HOST);
* is true, we *have* to do it in this order
*/
- if (vb->num_pfns != 0)
- tell_host(vb, vb->deflate_vq);
+ if (vb->num_pfns) {
+ if (use_sg)
+ tell_host_sgs(vb, vb->deflate_vq, pfn_min, pfn_max);
+ else
+ tell_host(vb, vb->deflate_vq);
+ }
release_pages_balloon(vb, &pages);
mutex_unlock(&vb->balloon_lock);
return num_freed_pages;
}
+/*
+ * The regular leak_balloon(...
2018 Jan 09
0
[PATCH v21 2/5 RESEND] virtio-balloon: VIRTIO_BALLOON_F_SG
...es -= VIRTIO_BALLOON_PAGES_PER_PAGE;
}
@@ -234,13 +373,55 @@ static unsigned leak_balloon(struct virtio_balloon *vb, size_t num)
* virtio_has_feature(vdev, VIRTIO_BALLOON_F_MUST_TELL_HOST);
* is true, we *have* to do it in this order
*/
- if (vb->num_pfns != 0)
- tell_host(vb, vb->deflate_vq);
+ if (vb->num_pfns) {
+ if (use_sg)
+ tell_host_sgs(vb, vb->deflate_vq, pfn_min, pfn_max);
+ else
+ tell_host(vb, vb->deflate_vq);
+ }
release_pages_balloon(vb, &pages);
mutex_unlock(&vb->balloon_lock);
return num_freed_pages;
}
+/*
+ * The regular leak_balloon(...
2011 Apr 07
2
[RFC][PATCH] virtio balloon: kill tell-host-first logic
...pages? */
- bool tell_host_first;
-
/* The pages we've told the Host we're not using. */
unsigned int num_pages;
struct list_head pages;
@@ -151,13 +148,14 @@ static void leak_balloon(struct virtio_b
vb->num_pages--;
}
- if (vb->tell_host_first) {
- tell_host(vb, vb->deflate_vq);
- release_pages_by_pfn(vb->pfns, vb->num_pfns);
- } else {
- release_pages_by_pfn(vb->pfns, vb->num_pfns);
- tell_host(vb, vb->deflate_vq);
- }
+
+ /*
+ * Note that if
+ * virtio_has_feature(vdev, VIRTIO_BALLOON_F_MUST_TELL_HOST);
+ * is true, we *have* to do it in this order...
2011 Apr 07
2
[RFC][PATCH] virtio balloon: kill tell-host-first logic
...pages? */
- bool tell_host_first;
-
/* The pages we've told the Host we're not using. */
unsigned int num_pages;
struct list_head pages;
@@ -151,13 +148,14 @@ static void leak_balloon(struct virtio_b
vb->num_pages--;
}
- if (vb->tell_host_first) {
- tell_host(vb, vb->deflate_vq);
- release_pages_by_pfn(vb->pfns, vb->num_pfns);
- } else {
- release_pages_by_pfn(vb->pfns, vb->num_pfns);
- tell_host(vb, vb->deflate_vq);
- }
+
+ /*
+ * Note that if
+ * virtio_has_feature(vdev, VIRTIO_BALLOON_F_MUST_TELL_HOST);
+ * is true, we *have* to do it in this order...
2017 Nov 03
0
[PATCH v17 4/6] virtio-balloon: VIRTIO_BALLOON_F_SG
...es -= VIRTIO_BALLOON_PAGES_PER_PAGE;
}
@@ -234,13 +370,56 @@ static unsigned leak_balloon(struct virtio_balloon *vb, size_t num)
* virtio_has_feature(vdev, VIRTIO_BALLOON_F_MUST_TELL_HOST);
* is true, we *have* to do it in this order
*/
- if (vb->num_pfns != 0)
- tell_host(vb, vb->deflate_vq);
+ if (vb->num_pfns) {
+ if (use_sg)
+ tell_host_sgs(vb, vb->deflate_vq, pfn_min, pfn_max);
+ else
+ tell_host(vb, vb->deflate_vq);
+ }
release_pages_balloon(vb, &pages);
mutex_unlock(&vb->balloon_lock);
return num_freed_pages;
}
+/*
+ * The regular leak_balloon(...
2013 May 28
2
[PATCH] virtio-balloon spec: rework VIRTIO_BALLOON_F_MUST_TELL_HOST feature, support silent deflation
...12 +186,8 @@ static void leak_balloon(struct virtio_balloon *vb, size_t num)
vb->num_pages -= VIRTIO_BALLOON_PAGES_PER_PAGE;
}
- /*
- * Note that if
- * virtio_has_feature(vdev, VIRTIO_BALLOON_F_MUST_TELL_HOST);
- * is true, we *have* to do it in this order
- */
- tell_host(vb, vb->deflate_vq);
+ if (virtio_has_feature(vdev, VIRTIO_BALLOON_F_SILENT_DEFLATE)
+ tell_host(vb, vb->deflate_vq);
mutex_unlock(&vb->balloon_lock);
release_pages_by_pfn(vb->pfns, vb->num_pfns);
}
@@ -543,6 +539,7 @@ static int virtballoon_restore(struct virtio_device *vdev)
static unsigned i...
2017 Aug 03
0
[PATCH v13 3/5] virtio-balloon: VIRTIO_BALLOON_F_SG
...ges -= VIRTIO_BALLOON_PAGES_PER_PAGE;
}
@@ -221,8 +318,12 @@ static unsigned leak_balloon(struct virtio_balloon *vb, size_t num)
* virtio_has_feature(vdev, VIRTIO_BALLOON_F_MUST_TELL_HOST);
* is true, we *have* to do it in this order
*/
- if (vb->num_pfns != 0)
- tell_host(vb, vb->deflate_vq);
+ if (vb->num_pfns) {
+ if (use_sg)
+ tell_host_sgs(vb, vb->deflate_vq, pfn_min, pfn_max);
+ else
+ tell_host(vb, vb->deflate_vq);
+ }
release_pages_balloon(vb, &pages);
mutex_unlock(&vb->balloon_lock);
return num_freed_pages;
@@ -441,6 +542,7 @@ static int init_vq...
2017 Sep 30
0
[PATCH v16 3/5] virtio-balloon: VIRTIO_BALLOON_F_SG
...ges -= VIRTIO_BALLOON_PAGES_PER_PAGE;
}
@@ -221,8 +357,12 @@ static unsigned leak_balloon(struct virtio_balloon *vb, size_t num)
* virtio_has_feature(vdev, VIRTIO_BALLOON_F_MUST_TELL_HOST);
* is true, we *have* to do it in this order
*/
- if (vb->num_pfns != 0)
- tell_host(vb, vb->deflate_vq);
+ if (vb->num_pfns) {
+ if (use_sg)
+ tell_host_sgs(vb, vb->deflate_vq, pfn_min, pfn_max);
+ else
+ tell_host(vb, vb->deflate_vq);
+ }
release_pages_balloon(vb, &pages);
mutex_unlock(&vb->balloon_lock);
return num_freed_pages;
@@ -441,6 +581,7 @@ static int init_vq...
2017 Oct 20
0
[PATCH v1 1/3] virtio-balloon: replace the coarse-grained balloon_lock
...loon_dev_info vb_dev_info;
- /* Synchronize access/update to this struct virtio_balloon elements */
- struct mutex balloon_lock;
-
- /* The array of pfns we tell the Host about. */
- unsigned int num_pfns;
- __virtio32 pfns[VIRTIO_BALLOON_ARRAY_PFNS_MAX];
+ /* Synchronize access to inflate_vq and deflate_vq respectively */
+ struct mutex inflate_lock;
+ struct mutex deflate_lock;
/* Memory statistics */
struct virtio_balloon_stat stats[VIRTIO_BALLOON_S_NR];
@@ -111,12 +108,13 @@ static void balloon_ack(struct virtqueue *vq)
wake_up(&vb->acked);
}
-static void tell_host(struct virtio_...
2017 Nov 29
0
[PATCH v18 07/10] virtio-balloon: VIRTIO_BALLOON_F_SG
...es -= VIRTIO_BALLOON_PAGES_PER_PAGE;
}
@@ -235,13 +367,55 @@ static unsigned leak_balloon(struct virtio_balloon *vb, size_t num)
* virtio_has_feature(vdev, VIRTIO_BALLOON_F_MUST_TELL_HOST);
* is true, we *have* to do it in this order
*/
- if (vb->num_pfns != 0)
- tell_host(vb, vb->deflate_vq);
+ if (vb->num_pfns) {
+ if (use_sg)
+ tell_host_sgs(vb, vb->deflate_vq, pfn_min, pfn_max);
+ else
+ tell_host(vb, vb->deflate_vq);
+ }
release_pages_balloon(vb, &pages);
mutex_unlock(&vb->balloon_lock);
return num_freed_pages;
}
+/*
+ * The regular leak_balloon(...
2017 Oct 02
2
[PATCH v16 3/5] virtio-balloon: VIRTIO_BALLOON_F_SG
...E;
> }
> @@ -221,8 +357,12 @@ static unsigned leak_balloon(struct virtio_balloon *vb, size_t num)
> * virtio_has_feature(vdev, VIRTIO_BALLOON_F_MUST_TELL_HOST);
> * is true, we *have* to do it in this order
> */
> - if (vb->num_pfns != 0)
> - tell_host(vb, vb->deflate_vq);
> + if (vb->num_pfns) {
> + if (use_sg)
> + tell_host_sgs(vb, vb->deflate_vq, pfn_min, pfn_max);
> + else
> + tell_host(vb, vb->deflate_vq);
> + }
> release_pages_balloon(vb, &pages);
> mutex_unlock(&vb->balloon_lock);
> return num_freed_...
2017 Oct 02
2
[PATCH v16 3/5] virtio-balloon: VIRTIO_BALLOON_F_SG
...E;
> }
> @@ -221,8 +357,12 @@ static unsigned leak_balloon(struct virtio_balloon *vb, size_t num)
> * virtio_has_feature(vdev, VIRTIO_BALLOON_F_MUST_TELL_HOST);
> * is true, we *have* to do it in this order
> */
> - if (vb->num_pfns != 0)
> - tell_host(vb, vb->deflate_vq);
> + if (vb->num_pfns) {
> + if (use_sg)
> + tell_host_sgs(vb, vb->deflate_vq, pfn_min, pfn_max);
> + else
> + tell_host(vb, vb->deflate_vq);
> + }
> release_pages_balloon(vb, &pages);
> mutex_unlock(&vb->balloon_lock);
> return num_freed_...
2017 Aug 03
2
[PATCH v13 3/5] virtio-balloon: VIRTIO_BALLOON_F_SG
...E;
> }
> @@ -221,8 +318,12 @@ static unsigned leak_balloon(struct virtio_balloon *vb, size_t num)
> * virtio_has_feature(vdev, VIRTIO_BALLOON_F_MUST_TELL_HOST);
> * is true, we *have* to do it in this order
> */
> - if (vb->num_pfns != 0)
> - tell_host(vb, vb->deflate_vq);
> + if (vb->num_pfns) {
> + if (use_sg)
> + tell_host_sgs(vb, vb->deflate_vq, pfn_min, pfn_max);
> + else
> + tell_host(vb, vb->deflate_vq);
> + }
> release_pages_balloon(vb, &pages);
> mutex_unlock(&vb->balloon_lock);
> return num_freed_...
2017 Aug 03
2
[PATCH v13 3/5] virtio-balloon: VIRTIO_BALLOON_F_SG
...E;
> }
> @@ -221,8 +318,12 @@ static unsigned leak_balloon(struct virtio_balloon *vb, size_t num)
> * virtio_has_feature(vdev, VIRTIO_BALLOON_F_MUST_TELL_HOST);
> * is true, we *have* to do it in this order
> */
> - if (vb->num_pfns != 0)
> - tell_host(vb, vb->deflate_vq);
> + if (vb->num_pfns) {
> + if (use_sg)
> + tell_host_sgs(vb, vb->deflate_vq, pfn_min, pfn_max);
> + else
> + tell_host(vb, vb->deflate_vq);
> + }
> release_pages_balloon(vb, &pages);
> mutex_unlock(&vb->balloon_lock);
> return num_freed_...
2017 Mar 03
0
[PATCH v7 kernel 3/5] virtio-balloon: implementation of VIRTIO_BALLOON_F_CHUNK_TRANSFER
...free on OOM");
static struct vfsmount *balloon_mnt;
#endif
+struct balloon_page_chunk {
+ __le64 base : 52;
+ __le64 size : 12;
+};
+
+struct balloon_page_chunk_ext {
+ __le64 base;
+ __le64 size;
+};
+
struct virtio_balloon {
struct virtio_device *vdev;
struct virtqueue *inflate_vq, *deflate_vq, *stats_vq;
@@ -67,6 +81,20 @@ struct virtio_balloon {
/* Number of balloon pages we've told the Host we're not using. */
unsigned int num_pages;
+ /* Pointer to the response header. */
+ struct virtio_balloon_resp_hdr resp_hdr;
+ /* Pointer to the start address of response data. */
+...
2017 Mar 16
0
[PATCH kernel v8 2/4] virtio-balloon: VIRTIO_BALLOON_F_CHUNK_TRANSFER
...tic struct vfsmount *balloon_mnt;
#endif
+#define BALLOON_CHUNK_BASE_SHIFT 12
+#define BALLOON_CHUNK_SIZE_SHIFT 12
+struct balloon_page_chunk {
+ __le64 base;
+ __le64 size;
+};
+
+typedef __le64 resp_data_t;
struct virtio_balloon {
struct virtio_device *vdev;
struct virtqueue *inflate_vq, *deflate_vq, *stats_vq;
@@ -67,6 +79,31 @@ struct virtio_balloon {
/* Number of balloon pages we've told the Host we're not using. */
unsigned int num_pages;
+ /* Pointer to the response header. */
+ struct virtio_balloon_resp_hdr *resp_hdr;
+ /* Pointer to the start address of response data. */...
2017 Apr 13
0
[PATCH v9 2/5] virtio-balloon: VIRTIO_BALLOON_F_BALLOON_CHUNKS
...@@ MODULE_PARM_DESC(oom_pages, "pages to free on OOM");
static struct vfsmount *balloon_mnt;
#endif
+/* Types of pages to chunk */
+#define PAGE_CHUNK_TYPE_BALLOON 0
+
+#define MAX_PAGE_CHUNKS 4096
struct virtio_balloon {
struct virtio_device *vdev;
struct virtqueue *inflate_vq, *deflate_vq, *stats_vq;
@@ -78,6 +86,32 @@ struct virtio_balloon {
/* Synchronize access/update to this struct virtio_balloon elements */
struct mutex balloon_lock;
+ /*
+ * Buffer for PAGE_CHUNK_TYPE_BALLOON:
+ * virtio_balloon_page_chunk_hdr +
+ * virtio_balloon_page_chunk * MAX_PAGE_CHUNKS
+ */
+...
2017 Aug 03
12
[PATCH v13 0/5] Virtio-balloon Enhancement
This patch series enhances the existing virtio-balloon with the following
new features:
1) fast ballooning: transfer ballooned pages between the guest and host in
chunks using sgs, instead of one by one; and
2) free_page_vq: a new virtqueue to report guest free pages to the host.
The second feature can be used to accelerate live migration of VMs. Here
are some details:
Live migration needs to