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...Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- include/uapi/linux/virtio_balloon.h | 3 +-- drivers/virtio/virtio_balloon.c | 3 +-- 2 files changed, 2 insertions(+), 4 deletions(-) diff --git a/include/uapi/linux/virtio_balloon.h b/include/uapi/linux/virtio_balloon.h index be40f70..4b0488f 100644 --- a/include/uapi/linux/virtio_balloon.h +++ b/include/uapi/linux/virtio_balloon.h @@ -36,8 +36,7 @@ /* Size of a PFN in the balloon interface. */ #define VIRTIO_BALLOON_PFN_SHIFT 12 -struct virtio_balloon_config -{ +struct virtio_balloon_config { /* Number of pages host want...

...Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- include/uapi/linux/virtio_balloon.h | 3 +-- drivers/virtio/virtio_balloon.c | 3 +-- 2 files changed, 2 insertions(+), 4 deletions(-) diff --git a/include/uapi/linux/virtio_balloon.h b/include/uapi/linux/virtio_balloon.h index be40f70..4b0488f 100644 --- a/include/uapi/linux/virtio_balloon.h +++ b/include/uapi/linux/virtio_balloon.h @@ -36,8 +36,7 @@ /* Size of a PFN in the balloon interface. */ #define VIRTIO_BALLOON_PFN_SHIFT 12 -struct virtio_balloon_config -{ +struct virtio_balloon_config { /* Number of pages host want...

...<mst at redhat.com> > --- > include/uapi/linux/virtio_balloon.h | 3 +-- > drivers/virtio/virtio_balloon.c | 3 +-- > 2 files changed, 2 insertions(+), 4 deletions(-) > > diff --git a/include/uapi/linux/virtio_balloon.h b/include/uapi/linux/virtio_balloon.h > index be40f70..4b0488f 100644 > --- a/include/uapi/linux/virtio_balloon.h > +++ b/include/uapi/linux/virtio_balloon.h > @@ -36,8 +36,7 @@ > /* Size of a PFN in the balloon interface. */ > #define VIRTIO_BALLOON_PFN_SHIFT 12 > > -struct virtio_balloon_config > -{ > +struct virtio_ba...

...<mst at redhat.com> > --- > include/uapi/linux/virtio_balloon.h | 3 +-- > drivers/virtio/virtio_balloon.c | 3 +-- > 2 files changed, 2 insertions(+), 4 deletions(-) > > diff --git a/include/uapi/linux/virtio_balloon.h b/include/uapi/linux/virtio_balloon.h > index be40f70..4b0488f 100644 > --- a/include/uapi/linux/virtio_balloon.h > +++ b/include/uapi/linux/virtio_balloon.h > @@ -36,8 +36,7 @@ > /* Size of a PFN in the balloon interface. */ > #define VIRTIO_BALLOON_PFN_SHIFT 12 > > -struct virtio_balloon_config > -{ > +struct virtio_ba...

...) static unsigned int features[] = { VIRTIO_BALLOON_F_MUST_TELL_HOST, VIRTIO_BALLOON_F_STATS_VQ, + VIRTIO_BALLOON_F_DEFLATE_ON_OOM, }; static struct virtio_driver virtio_balloon_driver = { diff --git a/include/uapi/linux/virtio_balloon.h b/include/uapi/linux/virtio_balloon.h index 5e26f61..be40f70 100644 --- a/include/uapi/linux/virtio_balloon.h +++ b/include/uapi/linux/virtio_balloon.h @@ -31,6 +31,7 @@ /* The feature bitmap for virtio balloon */ #define VIRTIO_BALLOON_F_MUST_TELL_HOST 0 /* Tell before reclaiming pages */ #define VIRTIO_BALLOON_F_STATS_VQ 1 /* Memory Stats virtqueue */ +...

...) static unsigned int features[] = { VIRTIO_BALLOON_F_MUST_TELL_HOST, VIRTIO_BALLOON_F_STATS_VQ, + VIRTIO_BALLOON_F_DEFLATE_ON_OOM, }; static struct virtio_driver virtio_balloon_driver = { diff --git a/include/uapi/linux/virtio_balloon.h b/include/uapi/linux/virtio_balloon.h index 5e26f61..be40f70 100644 --- a/include/uapi/linux/virtio_balloon.h +++ b/include/uapi/linux/virtio_balloon.h @@ -31,6 +31,7 @@ /* The feature bitmap for virtio balloon */ #define VIRTIO_BALLOON_F_MUST_TELL_HOST 0 /* Tell before reclaiming pages */ #define VIRTIO_BALLOON_F_STATS_VQ 1 /* Memory Stats virtqueue */ +...

...; --- > > include/uapi/linux/virtio_balloon.h | 3 +-- > > drivers/virtio/virtio_balloon.c | 3 +-- > > 2 files changed, 2 insertions(+), 4 deletions(-) > > > > diff --git a/include/uapi/linux/virtio_balloon.h b/include/uapi/linux/virtio_balloon.h > > index be40f70..4b0488f 100644 > > --- a/include/uapi/linux/virtio_balloon.h > > +++ b/include/uapi/linux/virtio_balloon.h > > @@ -36,8 +36,7 @@ > > /* Size of a PFN in the balloon interface. */ > > #define VIRTIO_BALLOON_PFN_SHIFT 12 > > > > -struct virtio_balloon_co...

...; --- > > include/uapi/linux/virtio_balloon.h | 3 +-- > > drivers/virtio/virtio_balloon.c | 3 +-- > > 2 files changed, 2 insertions(+), 4 deletions(-) > > > > diff --git a/include/uapi/linux/virtio_balloon.h b/include/uapi/linux/virtio_balloon.h > > index be40f70..4b0488f 100644 > > --- a/include/uapi/linux/virtio_balloon.h > > +++ b/include/uapi/linux/virtio_balloon.h > > @@ -36,8 +36,7 @@ > > /* Size of a PFN in the balloon interface. */ > > #define VIRTIO_BALLOON_PFN_SHIFT 12 > > > > -struct virtio_balloon_co...

Excessive virtio_balloon inflation can cause invocation of OOM-killer, when Linux is under severe memory pressure. Various mechanisms are responsible for correct virtio_balloon memory management. Nevertheless it is often the case that these control tools does not have enough time to react on fast changing memory load. As a result OS runs out of memory and invokes OOM-killer. The balancing of

Excessive virtio_balloon inflation can cause invocation of OOM-killer, when Linux is under severe memory pressure. Various mechanisms are responsible for correct virtio_balloon memory management. Nevertheless it is often the case that these control tools does not have enough time to react on fast changing memory load. As a result OS runs out of memory and invokes OOM-killer. The balancing of