Remove KVM specific tests in balloon_page(), instead marking
ballooning as inhibited without KVM_CAP_SYNC_MMU support.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
---
 accel/kvm/kvm-all.c        |    4 ++++
 hw/virtio/virtio-balloon.c |    4 +---
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index eb7db92a5e3b..38f468d8e2b1 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -39,6 +39,7 @@
 #include "trace.h"
 #include "hw/irq.h"
 #include "sysemu/sev.h"
+#include "sysemu/balloon.h"
 
 #include "hw/boards.h"
 
@@ -1698,6 +1699,9 @@ static int kvm_init(MachineState *ms)
     s->many_ioeventfds = kvm_check_many_ioeventfds();
 
     s->sync_mmu = !!kvm_vm_check_extension(kvm_state, KVM_CAP_SYNC_MMU);
+    if (!s->sync_mmu) {
+        qemu_balloon_inhibit(true);
+    }
 
     return 0;
 
diff --git a/hw/virtio/virtio-balloon.c b/hw/virtio/virtio-balloon.c
index 1f7a87f09429..b5425080c5fb 100644
--- a/hw/virtio/virtio-balloon.c
+++ b/hw/virtio/virtio-balloon.c
@@ -21,7 +21,6 @@
 #include "hw/mem/pc-dimm.h"
 #include "sysemu/balloon.h"
 #include "hw/virtio/virtio-balloon.h"
-#include "sysemu/kvm.h"
 #include "exec/address-spaces.h"
 #include "qapi/error.h"
 #include "qapi/qapi-events-misc.h"
@@ -36,8 +35,7 @@
 
 static void balloon_page(void *addr, int deflate)
 {
-    if (!qemu_balloon_is_inhibited() && (!kvm_enabled() ||
-                                         kvm_has_sync_mmu())) {
+    if (!qemu_balloon_is_inhibited()) {
         qemu_madvise(addr, BALLOON_PAGE_SIZE,
                 deflate ? QEMU_MADV_WILLNEED : QEMU_MADV_DONTNEED);
     }

On 31.07.2018 01:14, Alex Williamson wrote:
> Remove KVM specific tests in balloon_page(), instead marking
> ballooning as inhibited without KVM_CAP_SYNC_MMU support.
> 
> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
> ---
>  accel/kvm/kvm-all.c        |    4 ++++
>  hw/virtio/virtio-balloon.c |    4 +---
>  2 files changed, 5 insertions(+), 3 deletions(-)
> 
> diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
> index eb7db92a5e3b..38f468d8e2b1 100644
> --- a/accel/kvm/kvm-all.c
> +++ b/accel/kvm/kvm-all.c
> @@ -39,6 +39,7 @@
>  #include "trace.h"
>  #include "hw/irq.h"
>  #include "sysemu/sev.h"
> +#include "sysemu/balloon.h"
>  
>  #include "hw/boards.h"
>  
> @@ -1698,6 +1699,9 @@ static int kvm_init(MachineState *ms)
>      s->many_ioeventfds = kvm_check_many_ioeventfds();
>  
>      s->sync_mmu = !!kvm_vm_check_extension(kvm_state, KVM_CAP_SYNC_MMU);
> +    if (!s->sync_mmu) {
> +        qemu_balloon_inhibit(true);
> +    }
>  
>      return 0;
>  
> diff --git a/hw/virtio/virtio-balloon.c b/hw/virtio/virtio-balloon.c
> index 1f7a87f09429..b5425080c5fb 100644
> --- a/hw/virtio/virtio-balloon.c
> +++ b/hw/virtio/virtio-balloon.c
> @@ -21,7 +21,6 @@
>  #include "hw/mem/pc-dimm.h"
>  #include "sysemu/balloon.h"
>  #include "hw/virtio/virtio-balloon.h"
> -#include "sysemu/kvm.h"
>  #include "exec/address-spaces.h"
>  #include "qapi/error.h"
>  #include "qapi/qapi-events-misc.h"
> @@ -36,8 +35,7 @@
>  
>  static void balloon_page(void *addr, int deflate)
>  {
> -    if (!qemu_balloon_is_inhibited() && (!kvm_enabled() ||
> -                                         kvm_has_sync_mmu())) {
> +    if (!qemu_balloon_is_inhibited()) {
>          qemu_madvise(addr, BALLOON_PAGE_SIZE,
>                  deflate ? QEMU_MADV_WILLNEED : QEMU_MADV_DONTNEED);
>      }
> 

Reviewed-by: David Hildenbrand <david@redhat.com>

-- 

Thanks,

David / dhildenb

On Mon, Jul 30, 2018 at 05:14:06PM -0600, Alex Williamson wrote:
> Remove KVM specific tests in balloon_page(), instead marking
> ballooning as inhibited without KVM_CAP_SYNC_MMU support.
> 
> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>

Reviewed-by: Peter Xu <peterx@redhat.com>

Regards,

-- 
Peter Xu

On Mon, 30 Jul 2018 17:14:06 -0600
Alex Williamson <alex.williamson@redhat.com> wrote:

> Remove KVM specific tests in balloon_page(), instead marking
> ballooning as inhibited without KVM_CAP_SYNC_MMU support.
> 
> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
> ---
>  accel/kvm/kvm-all.c        |    4 ++++
>  hw/virtio/virtio-balloon.c |    4 +---
>  2 files changed, 5 insertions(+), 3 deletions(-)

Reviewed-by: Cornelia Huck <cohuck@redhat.com>