From 07b0403dfc2b2ac179ae5b48105096cc2d03375a Mon Sep 17 00:00:00 2001 From: Eduardo Habkost Date: Tue, 14 Sep 2010 13:43:39 -0300 Subject: disable guest-provided stats on "info balloon" command The addition of memory stats reporting to the virtio balloon causes the 'info balloon' command to become asynchronous. This is a regression because in some cases it can hang the user monitor. This is an alternative to Adam Litke's patch. Adam's patch disabled the corresponding (guest-visible) virtio feature bit, causing issues for migration. Original discussion is available at: http://marc.info/?l=qemu-devel&m=128448124328314&w=2 Signed-off-by: Eduardo Habkost Acked-by: Adam Litke --- hw/virtio-balloon.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'hw/virtio-balloon.c') diff --git a/hw/virtio-balloon.c b/hw/virtio-balloon.c index 1e746741ff..8adddeaa53 100644 --- a/hw/virtio-balloon.c +++ b/hw/virtio-balloon.c @@ -29,6 +29,10 @@ #include #endif +/* Disable guest-provided stats by now (https://bugzilla.redhat.com/show_bug.cgi?id=623903) */ +#define ENABLE_GUEST_STATS 0 + + typedef struct VirtIOBalloon { VirtIODevice vdev; @@ -83,12 +87,14 @@ static QObject *get_stats_qobject(VirtIOBalloon *dev) VIRTIO_BALLOON_PFN_SHIFT); stat_put(dict, "actual", actual); +#if ENABLE_GUEST_STATS stat_put(dict, "mem_swapped_in", dev->stats[VIRTIO_BALLOON_S_SWAP_IN]); stat_put(dict, "mem_swapped_out", dev->stats[VIRTIO_BALLOON_S_SWAP_OUT]); stat_put(dict, "major_page_faults", dev->stats[VIRTIO_BALLOON_S_MAJFLT]); stat_put(dict, "minor_page_faults", dev->stats[VIRTIO_BALLOON_S_MINFLT]); stat_put(dict, "free_mem", dev->stats[VIRTIO_BALLOON_S_MEMFREE]); stat_put(dict, "total_mem", dev->stats[VIRTIO_BALLOON_S_MEMTOT]); +#endif return QOBJECT(dict); } @@ -214,7 +220,7 @@ static void virtio_balloon_to_target(void *opaque, ram_addr_t target, } dev->stats_callback = cb; dev->stats_opaque_callback_data = cb_data; - if (dev->vdev.guest_features & (1 << VIRTIO_BALLOON_F_STATS_VQ)) { + if (ENABLE_GUEST_STATS && (dev->vdev.guest_features & (1 << VIRTIO_BALLOON_F_STATS_VQ))) { virtqueue_push(dev->svq, &dev->stats_vq_elem, dev->stats_vq_offset); virtio_notify(&dev->vdev, dev->svq); } else { -- cgit v1.2.3