Hi,
On Wed, 2009-02-11 at 12:41 +0100, Phil Ten wrote:
> Hello,
>
> My kvm processes are exiting on what I think are VIRTIO errors:
>
> Guest moved used index from 24543 to 24606
This is very strange. The code in question is:
static int virtqueue_num_heads(VirtQueue *vq, unsigned int idx)
{
uint16_t num_heads = vring_avail_idx(vq) - idx;
/* Check it isn't doing very strange things with descriptor numbers. */
if (num_heads > vq->vring.num) {
fprintf(stderr, "Guest moved used index from %u to %u",
idx, vring_avail_idx(vq));
exit(1);
...
i.e. for virtio_net, vq->vring.num == 256 and 24606 - 24543 == 63, so it
doesn't make much sense.
Does this happen under heavy network traffic? Have you tried virtio_blk?
Thanks,
Mark.
--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
