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virtio-blk: trace vdev so devices can be distinguished
It is hard to analyze trace logs with multiple virtio-blk devices because none of the trace events include the VirtIODevice *vdev. This patch adds vdev so it's clear which device a request is associated with. I considered using VirtIOBlock *s instead but VirtIODevice *vdev is more general and may be correlated with generic virtio trace events like virtio_set_status. Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com> Reviewed-by: NFam Zheng <famz@redhat.com> Message-id: 20170614092930.11234-1-stefanha@redhat.com Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
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