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This patchset is for kernel and contains two parts of change 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

This patchset is for kernel and contains two parts of change 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

...cornelia.huck at de.ibm.com> Cc: Amit Shah <amit.shah at redhat.com> --- drivers/virtio/virtio_balloon.c | 184 +++++++++++++++++++++++++++++++++++----- 1 file changed, 162 insertions(+), 22 deletions(-) diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index 8d649a2..2d18ff6 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -41,10 +41,28 @@ #define OOM_VBALLOON_DEFAULT_PAGES 256 #define VIRTBALLOON_OOM_NOTIFY_PRIORITY 80 +/* + * VIRTIO_BALLOON_PFNS_LIMIT is used to limit the size of page bitmap + * to prevent a very larg...

...; Cc: Amit Shah <amit.shah at redhat.com> > --- > drivers/virtio/virtio_balloon.c | 184 +++++++++++++++++++++++++++++++++++----- > 1 file changed, 162 insertions(+), 22 deletions(-) > > diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c > index 8d649a2..2d18ff6 100644 > --- a/drivers/virtio/virtio_balloon.c > +++ b/drivers/virtio/virtio_balloon.c > @@ -41,10 +41,28 @@ > #define OOM_VBALLOON_DEFAULT_PAGES 256 > #define VIRTBALLOON_OOM_NOTIFY_PRIORITY 80 > > +/* > + * VIRTIO_BALLOON_PFNS_LIMIT is used to limit the size o...

...; Cc: Amit Shah <amit.shah at redhat.com> > --- > drivers/virtio/virtio_balloon.c | 184 +++++++++++++++++++++++++++++++++++----- > 1 file changed, 162 insertions(+), 22 deletions(-) > > diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c > index 8d649a2..2d18ff6 100644 > --- a/drivers/virtio/virtio_balloon.c > +++ b/drivers/virtio/virtio_balloon.c > @@ -41,10 +41,28 @@ > #define OOM_VBALLOON_DEFAULT_PAGES 256 > #define VIRTBALLOON_OOM_NOTIFY_PRIORITY 80 > > +/* > + * VIRTIO_BALLOON_PFNS_LIMIT is used to limit the size o...

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%.

...; Cc: Amit Shah <amit.shah at redhat.com> > --- > drivers/virtio/virtio_balloon.c | 184 +++++++++++++++++++++++++++++++++++----- > 1 file changed, 162 insertions(+), 22 deletions(-) > > diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c > index 8d649a2..2d18ff6 100644 > --- a/drivers/virtio/virtio_balloon.c > +++ b/drivers/virtio/virtio_balloon.c > @@ -41,10 +41,28 @@ > #define OOM_VBALLOON_DEFAULT_PAGES 256 > #define VIRTBALLOON_OOM_NOTIFY_PRIORITY 80 > > +/* > + * VIRTIO_BALLOON_PFNS_LIMIT is used to limit the size o...

...; Cc: Amit Shah <amit.shah at redhat.com> > --- > drivers/virtio/virtio_balloon.c | 184 +++++++++++++++++++++++++++++++++++----- > 1 file changed, 162 insertions(+), 22 deletions(-) > > diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c > index 8d649a2..2d18ff6 100644 > --- a/drivers/virtio/virtio_balloon.c > +++ b/drivers/virtio/virtio_balloon.c > @@ -41,10 +41,28 @@ > #define OOM_VBALLOON_DEFAULT_PAGES 256 > #define VIRTBALLOON_OOM_NOTIFY_PRIORITY 80 > > +/* > + * VIRTIO_BALLOON_PFNS_LIMIT is used to limit the size o...