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[Qemu-devel] [PATCHv2 1/6] virtio-net: don't dma while vm is stopped
From: |
Michael S. Tsirkin |
Subject: |
[Qemu-devel] [PATCHv2 1/6] virtio-net: don't dma while vm is stopped |
Date: |
Wed, 24 Nov 2010 17:52:54 +0200 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
DMA into memory while VM is stopped makes it
hard to debug migration (consequitive saves
result in different files).
Fixing this completely is a large effort,
this patch does this for virtio-net.
Signed-off-by: Michael S. Tsirkin <address@hidden>
Tested-by: Jason Wang <address@hidden>
---
hw/virtio-net.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/hw/virtio-net.c b/hw/virtio-net.c
index 1d61f19..43a2b3d 100644
--- a/hw/virtio-net.c
+++ b/hw/virtio-net.c
@@ -424,6 +424,9 @@ static void virtio_net_handle_rx(VirtIODevice *vdev,
VirtQueue *vq)
static int virtio_net_can_receive(VLANClientState *nc)
{
VirtIONet *n = DO_UPCAST(NICState, nc, nc)->opaque;
+ if (!n->vm_running) {
+ return 0;
+ }
if (!virtio_queue_ready(n->rx_vq) ||
!(n->vdev.status & VIRTIO_CONFIG_S_DRIVER_OK))
--
1.7.3.2.91.g446ac
- [Qemu-devel] [PATCHv2 6/6] migration: allow rate > 4g, (continued)
[Qemu-devel] [PATCHv2 5/6] migration: stable ram block ordering, Michael S. Tsirkin, 2010/11/24
[Qemu-devel] [PATCHv2 1/6] virtio-net: don't dma while vm is stopped,
Michael S. Tsirkin <=