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From: Alexander Duyck <alexander.h.duyck at linux.intel.com> If we have free page hinting or page reporting enabled we should disable it if the pages are poisoned or initialized on free and we cannot notify the hypervisor. Fixes: 5d757c8d518d ("virtio-balloon: add support for providing free page reports to host") Signed-off-by: Alexander Duyck <alexander.h.duyck at linux.intel.com> --- drivers/virtio/virtio_balloon.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/virtio/virtio_ballo...

From: Alexander Duyck <alexander.h.duyck at linux.intel.com> If we have free page hinting or page reporting enabled we should disable it if the pages are poisoned or initialized on free and we cannot notify the hypervisor. Fixes: 5d757c8d518d ("virtio-balloon: add support for providing free page reports to host") Signed-off-by: Alexander Duyck <alexander.h.duyck at linux.intel.com> --- drivers/virtio/virtio_balloon.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/virtio/virtio_ballo...

...This way we can avoid the possibility of corrupting guest memory. Normally the page poisoning feature should always be present when free page reporting is enabled on the hypervisor, however this allows us to correctly handle a case of the virtio-balloon device being possibly misconfigured. Fixes: 5d757c8d518d ("virtio-balloon: add support for providing free page reports to host") Acked-by: David Hildenbrand <david at redhat.com> Signed-off-by: Alexander Duyck <alexander.h.duyck at linux.intel.com> --- Changes since v1: Originally this patch also modified free page hinting, that ha...

...This way we can avoid the possibility of corrupting guest memory. Normally the page poisoning feature should always be present when free page reporting is enabled on the hypervisor, however this allows us to correctly handle a case of the virtio-balloon device being possibly misconfigured. Fixes: 5d757c8d518d ("virtio-balloon: add support for providing free page reports to host") Acked-by: David Hildenbrand <david at redhat.com> Signed-off-by: Alexander Duyck <alexander.h.duyck at linux.intel.com> --- Changes since v1: Originally this patch also modified free page hinting, that ha...

...ay we can avoid the possibility of corrupting guest memory. Normally the page poison reporting feature should always be present when free page reporting is enabled on the hypervisor, however this allows us to correctly handle a case of the virtio-balloon device being possibly misconfigured. Fixes: 5d757c8d518d ("virtio-balloon: add support for providing free page reports to host") Signed-off-by: Alexander Duyck <alexander.h.duyck at linux.intel.com> --- Changes since v1: Originally this patch also modified free page hinting, that has been removed. Updated patch title and description. Add...

...ay we can avoid the possibility of corrupting guest memory. Normally the page poison reporting feature should always be present when free page reporting is enabled on the hypervisor, however this allows us to correctly handle a case of the virtio-balloon device being possibly misconfigured. Fixes: 5d757c8d518d ("virtio-balloon: add support for providing free page reports to host") Signed-off-by: Alexander Duyck <alexander.h.duyck at linux.intel.com> --- Changes since v1: Originally this patch also modified free page hinting, that has been removed. Updated patch title and description. Add...

...gt; From: Alexander Duyck <alexander.h.duyck at linux.intel.com> > > > > If we have free page hinting or page reporting enabled we should disable it > > if the pages are poisoned or initialized on free and we cannot notify the > > hypervisor. > > > > Fixes: 5d757c8d518d ("virtio-balloon: add support for providing free page reports to host") > > > > Signed-off-by: Alexander Duyck <alexander.h.duyck at linux.intel.com> > > > Why not put this logic in the hypervisor? I did that too. This is to cover the case where somebody is run...

...duyck at linux.intel.com> >>>> >>>> If we have free page hinting or page reporting enabled we should disable it >>>> if the pages are poisoned or initialized on free and we cannot notify the >>>> hypervisor. >>>> >>>> Fixes: 5d757c8d518d ("virtio-balloon: add support for providing free page reports to host") >>>> >>>> Signed-off-by: Alexander Duyck <alexander.h.duyck at linux.intel.com> >>> >>> >>> Why not put this logic in the hypervisor? >> >> I did th...

...ing guest memory. Normally the page poisoning feature > > should always be present when free page reporting is enabled on the > > hypervisor, however this allows us to correctly handle a case of the > > virtio-balloon device being possibly misconfigured. > > > > Fixes: 5d757c8d518d ("virtio-balloon: add support for providing free page reports to host") > > Acked-by: David Hildenbrand <david at redhat.com> > > Signed-off-by: Alexander Duyck <alexander.h.duyck at linux.intel.com> > > --- > > > > Changes since v1: > > Ori...

...st memory. Normally the page poison > > reporting feature should always be present when free page reporting is > > enabled on the hypervisor, however this allows us to correctly handle a > > case of the virtio-balloon device being possibly misconfigured. > > > > Fixes: 5d757c8d518d ("virtio-balloon: add support for providing free page reports to host") > > Signed-off-by: Alexander Duyck <alexander.h.duyck at linux.intel.com> > > --- > > > > Changes since v1: > > Originally this patch also modified free page hinting, that has been...

...st memory. Normally the page poison > > reporting feature should always be present when free page reporting is > > enabled on the hypervisor, however this allows us to correctly handle a > > case of the virtio-balloon device being possibly misconfigured. > > > > Fixes: 5d757c8d518d ("virtio-balloon: add support for providing free page reports to host") > > Signed-off-by: Alexander Duyck <alexander.h.duyck at linux.intel.com> > > --- > > > > Changes since v1: > > Originally this patch also modified free page hinting, that has been...

...00, Alexander Duyck wrote: > From: Alexander Duyck <alexander.h.duyck at linux.intel.com> > > If we have free page hinting or page reporting enabled we should disable it > if the pages are poisoned or initialized on free and we cannot notify the > hypervisor. > > Fixes: 5d757c8d518d ("virtio-balloon: add support for providing free page reports to host") > > Signed-off-by: Alexander Duyck <alexander.h.duyck at linux.intel.com> Why not put this logic in the hypervisor? We don't know what hypervisor uses the hints for. Yes you can not just drop them b...

...bility of corrupting guest memory. Normally the page poison > reporting feature should always be present when free page reporting is > enabled on the hypervisor, however this allows us to correctly handle a > case of the virtio-balloon device being possibly misconfigured. > > Fixes: 5d757c8d518d ("virtio-balloon: add support for providing free page reports to host") > Signed-off-by: Alexander Duyck <alexander.h.duyck at linux.intel.com> > --- > > Changes since v1: > Originally this patch also modified free page hinting, that has been removed. > Updated pa...

...t; possibility of corrupting guest memory. Normally the page poisoning feature > should always be present when free page reporting is enabled on the > hypervisor, however this allows us to correctly handle a case of the > virtio-balloon device being possibly misconfigured. > > Fixes: 5d757c8d518d ("virtio-balloon: add support for providing free page reports to host") > Acked-by: David Hildenbrand <david at redhat.com> > Signed-off-by: Alexander Duyck <alexander.h.duyck at linux.intel.com> > --- > > Changes since v1: > Originally this patch also modifi...

...gt; >>>> > >>>> If we have free page hinting or page reporting enabled we should disable it > >>>> if the pages are poisoned or initialized on free and we cannot notify the > >>>> hypervisor. > >>>> > >>>> Fixes: 5d757c8d518d ("virtio-balloon: add support for providing free page reports to host") > >>>> > >>>> Signed-off-by: Alexander Duyck <alexander.h.duyck at linux.intel.com> > >>> > >>> > >>> Why not put this logic in the hypervisor? &...

...alexander.h.duyck at linux.intel.com> > > > > > > If we have free page hinting or page reporting enabled we should disable it > > > if the pages are poisoned or initialized on free and we cannot notify the > > > hypervisor. > > > > > > Fixes: 5d757c8d518d ("virtio-balloon: add support for providing free page reports to host") > > > > > > Signed-off-by: Alexander Duyck <alexander.h.duyck at linux.intel.com> > > > > > > Why not put this logic in the hypervisor? > > I did that too. This is to c...

...;> >>>>>> If we have free page hinting or page reporting enabled we should disable it >>>>>> if the pages are poisoned or initialized on free and we cannot notify the >>>>>> hypervisor. >>>>>> >>>>>> Fixes: 5d757c8d518d ("virtio-balloon: add support for providing free page reports to host") >>>>>> >>>>>> Signed-off-by: Alexander Duyck <alexander.h.duyck at linux.intel.com> >>>>> >>>>> >>>>> Why not put this logic in th...

...ally the page poison >>> reporting feature should always be present when free page reporting is >>> enabled on the hypervisor, however this allows us to correctly handle a >>> case of the virtio-balloon device being possibly misconfigured. >>> >>> Fixes: 5d757c8d518d ("virtio-balloon: add support for providing free page reports to host") >>> Signed-off-by: Alexander Duyck <alexander.h.duyck at linux.intel.com> >>> --- >>> >>> Changes since v1: >>> Originally this patch also modified free page hinting,...

...t;>> If we have free page hinting or page reporting enabled we should disable it > >>>>>> if the pages are poisoned or initialized on free and we cannot notify the > >>>>>> hypervisor. > >>>>>> > >>>>>> Fixes: 5d757c8d518d ("virtio-balloon: add support for providing free page reports to host") > >>>>>> > >>>>>> Signed-off-by: Alexander Duyck <alexander.h.duyck at linux.intel.com> > >>>>> > >>>>> > >>>>> Why...

...>>> reporting feature should always be present when free page reporting is > >>> enabled on the hypervisor, however this allows us to correctly handle a > >>> case of the virtio-balloon device being possibly misconfigured. > >>> > >>> Fixes: 5d757c8d518d ("virtio-balloon: add support for providing free page reports to host") > >>> Signed-off-by: Alexander Duyck <alexander.h.duyck at linux.intel.com> > >>> --- > >>> > >>> Changes since v1: > >>> Originally this patch also mo...