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...> drivers/virtio/virtio_balloon.c | 371 +++++++++++++++++++++++++++++++++- > -- > include/uapi/linux/virtio_balloon.h | 9 + > 2 files changed, 353 insertions(+), 27 deletions(-) > > diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index > f59cb4f..3f4a161 100644 > --- a/drivers/virtio/virtio_balloon.c > +++ b/drivers/virtio/virtio_balloon.c > @@ -42,6 +42,10 @@ > #define OOM_VBALLOON_DEFAULT_PAGES 256 > #define VIRTBALLOON_OOM_NOTIFY_PRIORITY 80 > > +#define PAGE_BMAP_SIZE (8 * PAGE_SIZE) > +#define PFNS_PER_PAGE_...

...> drivers/virtio/virtio_balloon.c | 371 +++++++++++++++++++++++++++++++++- > -- > include/uapi/linux/virtio_balloon.h | 9 + > 2 files changed, 353 insertions(+), 27 deletions(-) > > diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index > f59cb4f..3f4a161 100644 > --- a/drivers/virtio/virtio_balloon.c > +++ b/drivers/virtio/virtio_balloon.c > @@ -42,6 +42,10 @@ > #define OOM_VBALLOON_DEFAULT_PAGES 256 > #define VIRTBALLOON_OOM_NOTIFY_PRIORITY 80 > > +#define PAGE_BMAP_SIZE (8 * PAGE_SIZE) > +#define PFNS_PER_PAGE_...

...+++++++- > > > -- > > > include/uapi/linux/virtio_balloon.h | 9 + > > > 2 files changed, 353 insertions(+), 27 deletions(-) > > > > > > diff --git a/drivers/virtio/virtio_balloon.c > > > b/drivers/virtio/virtio_balloon.c index > > > f59cb4f..3f4a161 100644 > > > --- a/drivers/virtio/virtio_balloon.c > > > +++ b/drivers/virtio/virtio_balloon.c > > > @@ -42,6 +42,10 @@ > > > #define OOM_VBALLOON_DEFAULT_PAGES 256 #define > > > VIRTBALLOON_OOM_NOTIFY_PRIORITY 80 > > > > > >...

...+++++++- > > > -- > > > include/uapi/linux/virtio_balloon.h | 9 + > > > 2 files changed, 353 insertions(+), 27 deletions(-) > > > > > > diff --git a/drivers/virtio/virtio_balloon.c > > > b/drivers/virtio/virtio_balloon.c index > > > f59cb4f..3f4a161 100644 > > > --- a/drivers/virtio/virtio_balloon.c > > > +++ b/drivers/virtio/virtio_balloon.c > > > @@ -42,6 +42,10 @@ > > > #define OOM_VBALLOON_DEFAULT_PAGES 256 #define > > > VIRTBALLOON_OOM_NOTIFY_PRIORITY 80 > > > > > >...

...lloon.c | 371 +++++++++++++++++++++++++++++++++- > > -- > > include/uapi/linux/virtio_balloon.h | 9 + > > 2 files changed, 353 insertions(+), 27 deletions(-) > > > > diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index > > f59cb4f..3f4a161 100644 > > --- a/drivers/virtio/virtio_balloon.c > > +++ b/drivers/virtio/virtio_balloon.c > > @@ -42,6 +42,10 @@ > > #define OOM_VBALLOON_DEFAULT_PAGES 256 > > #define VIRTBALLOON_OOM_NOTIFY_PRIORITY 80 > > > > +#define PAGE_BMAP_SIZE (8 * PAGE...

This patch series implements two optimizations: 1) transfer pages in chuncks between the guest and host; 2) transfer the guest unused pages to the host so that they can be skipped to migrate in live migration. Please read each patch commit log for details. Changes: v7->v8: 1) Use only one chunk format, instead of two. 2) re-write the virtio-balloon implementation patch. 3) commit changes 4)

This patch series implements two optimizations: 1) transfer pages in chuncks between the guest and host; 2) transfer the guest unused pages to the host so that they can be skipped to migrate in live migration. Please read each patch commit log for details. Changes: v7->v8: 1) Use only one chunk format, instead of two. 2) re-write the virtio-balloon implementation patch. 3) commit changes 4)

..." on my machine. >> --- >> drivers/virtio/virtio_balloon.c | 351 ++++++++++++++++++++++++++++++++++++---- >> 1 file changed, 323 insertions(+), 28 deletions(-) >> >> diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c >> index f59cb4f..4416370 100644 >> --- a/drivers/virtio/virtio_balloon.c >> +++ b/drivers/virtio/virtio_balloon.c >> @@ -42,6 +42,10 @@ >> #define OOM_VBALLOON_DEFAULT_PAGES 256 >> #define VIRTBALLOON_OOM_NOTIFY_PRIORITY 80 >> >> +#define PAGE_BMAP_SIZE (8 * PAGE_SI...

...ss sparse? I see some endian-ness issues here. > --- > drivers/virtio/virtio_balloon.c | 351 ++++++++++++++++++++++++++++++++++++---- > 1 file changed, 323 insertions(+), 28 deletions(-) > > diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c > index f59cb4f..4416370 100644 > --- a/drivers/virtio/virtio_balloon.c > +++ b/drivers/virtio/virtio_balloon.c > @@ -42,6 +42,10 @@ > #define OOM_VBALLOON_DEFAULT_PAGES 256 > #define VIRTBALLOON_OOM_NOTIFY_PRIORITY 80 > > +#define PAGE_BMAP_SIZE (8 * PAGE_SIZE) > +#define PFNS_PER_PAGE...

...ss sparse? I see some endian-ness issues here. > --- > drivers/virtio/virtio_balloon.c | 351 ++++++++++++++++++++++++++++++++++++---- > 1 file changed, 323 insertions(+), 28 deletions(-) > > diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c > index f59cb4f..4416370 100644 > --- a/drivers/virtio/virtio_balloon.c > +++ b/drivers/virtio/virtio_balloon.c > @@ -42,6 +42,10 @@ > #define OOM_VBALLOON_DEFAULT_PAGES 256 > #define VIRTBALLOON_OOM_NOTIFY_PRIORITY 80 > > +#define PAGE_BMAP_SIZE (8 * PAGE_SIZE) > +#define PFNS_PER_PAGE...

...;aarcange at redhat.com> Cc: David Hildenbrand <david at redhat.com> --- drivers/virtio/virtio_balloon.c | 348 ++++++++++++++++++++++++++++++++++++---- 1 file changed, 320 insertions(+), 28 deletions(-) diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index f59cb4f..03383b3 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -42,6 +42,10 @@ #define OOM_VBALLOON_DEFAULT_PAGES 256 #define VIRTBALLOON_OOM_NOTIFY_PRIORITY 80 +#define BALLOON_BMAP_SIZE (8 * PAGE_SIZE) +#define PFNS_PER_BMAP (BALLOON_BMAP_SIZE * BITS_PER_BYTE)...

...<liliang324 at gmail.com> Cc: Wei Wang <wei.w.wang at intel.com> --- drivers/virtio/virtio_balloon.c | 351 ++++++++++++++++++++++++++++++++++++---- 1 file changed, 323 insertions(+), 28 deletions(-) diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index f59cb4f..4416370 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -42,6 +42,10 @@ #define OOM_VBALLOON_DEFAULT_PAGES 256 #define VIRTBALLOON_OOM_NOTIFY_PRIORITY 80 +#define PAGE_BMAP_SIZE (8 * PAGE_SIZE) +#define PFNS_PER_PAGE_BMAP (PAGE_BMAP_SIZE * BITS_PER_BYTE) +...

Take over this work from Liang. This patch series implements two optimizations: 1) transfer pages in chuncks between the guest and host; 1) transfer the guest unused pages to the host so that they can be skipped to migrate in live migration. Please check patch 0003 for more details about optimization 1). For an idle guest with 8GB RAM, optimization 2) can help shorten the total live migration

Take over this work from Liang. This patch series implements two optimizations: 1) transfer pages in chuncks between the guest and host; 1) transfer the guest unused pages to the host so that they can be skipped to migrate in live migration. Please check patch 0003 for more details about optimization 1). For an idle guest with 8GB RAM, optimization 2) can help shorten the total live migration

...irkin <mst at redhat.com> --- drivers/virtio/virtio_balloon.c | 371 +++++++++++++++++++++++++++++++++--- include/uapi/linux/virtio_balloon.h | 9 + 2 files changed, 353 insertions(+), 27 deletions(-) diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index f59cb4f..3f4a161 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -42,6 +42,10 @@ #define OOM_VBALLOON_DEFAULT_PAGES 256 #define VIRTBALLOON_OOM_NOTIFY_PRIORITY 80 +#define PAGE_BMAP_SIZE (8 * PAGE_SIZE) +#define PFNS_PER_PAGE_BMAP (PAGE_BMAP_SIZE * BITS_PER_BYTE) +...

...rkin <mst at redhat.com> --- drivers/virtio/virtio_balloon.c | 384 +++++++++++++++++++++++++++++++++--- include/uapi/linux/virtio_balloon.h | 13 ++ 2 files changed, 374 insertions(+), 23 deletions(-) diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index f59cb4f..5e2e7cc 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -42,6 +42,10 @@ #define OOM_VBALLOON_DEFAULT_PAGES 256 #define VIRTBALLOON_OOM_NOTIFY_PRIORITY 80 +#define PAGE_BMAP_SIZE (8 * PAGE_SIZE) +#define PFNS_PER_PAGE_BMAP (PAGE_BMAP_SIZE * BITS_PER_BYTE)...

This patch series implements two optimizations: 1) transfer pages in chuncks between the guest and host; 2) transfer the guest unused pages to the host so that they can be skipped to migrate in live migration. Changes: v8->v9: 1) Split the two new features, VIRTIO_BALLOON_F_BALLOON_CHUNKS and VIRTIO_BALLOON_F_MISC_VQ, which were mixed together in the previous implementation; 2) Simpler

This patch series implements two optimizations: 1) transfer pages in chuncks between the guest and host; 2) transfer the guest unused pages to the host so that they can be skipped to migrate in live migration. Changes: v8->v9: 1) Split the two new features, VIRTIO_BALLOON_F_BALLOON_CHUNKS and VIRTIO_BALLOON_F_MISC_VQ, which were mixed together in the previous implementation; 2) Simpler

This patch set contains two parts of changes to the virtio-balloon. One is the change for speeding up the inflating & deflating process, the main idea of this optimization is to use bitmap to send the page information to host instead of the PFNs, to reduce the overhead of virtio data transmission, address translation and madvise(). This can help to improve the performance by about 85%.

This patch set contains two parts of changes to the virtio-balloon. One is the change for speeding up the inflating & deflating process, the main idea of this optimization is to use bitmap to send the page information to host instead of the PFNs, to reduce the overhead of virtio data transmission, address translation and madvise(). This can help to improve the performance by about 85%.