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Re: [Qemu-devel] [Qemu-block] Guest unresponsive after Virtqueue size ex
From: |
Stefan Hajnoczi |
Subject: |
Re: [Qemu-devel] [Qemu-block] Guest unresponsive after Virtqueue size exceeded error |
Date: |
Mon, 4 Feb 2019 14:06:36 +0800 |
User-agent: |
Mutt/1.10.1 (2018-07-13) |
Are you sure this happens with both virtio-blk and virtio-scsi?
The following patch adds more debug output. You can build as follows:
$ git clone https://git.qemu.org/git/qemu.git
$ cd qemu
$ patch apply -p1
...paste the patch here...
^D
# For info on build dependencies see https://wiki.qemu.org/Hosts/Linux
$ ./configure --target-list=x86_64-softmmu
$ make -j4
You can configure a libvirt domain to use your custom QEMU binary by
changing the <devices><emulator> tag to the
qemu/x86_64-softmmu/qemu-system-x86_64 path.
---
diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index 22bd1ac34e..aa44bffa1f 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -879,6 +879,9 @@ void *virtqueue_pop(VirtQueue *vq, size_t sz)
max = vq->vring.num;
if (vq->inuse >= vq->vring.num) {
+ fprintf(stderr, "vdev %p (\"%s\")\n", vdev, vdev->name);
+ fprintf(stderr, "vq %p (idx %u)\n", vq, (unsigned int)(vq - vdev->vq));
+ fprintf(stderr, "inuse %u vring.num %u\n", vq->inuse, vq->vring.num);
virtio_error(vdev, "Virtqueue size exceeded");
goto done;
}
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- Re: [Qemu-devel] [Qemu-block] Guest unresponsive after Virtqueue size exceeded error, Stefan Hajnoczi, 2019/02/01
- Re: [Qemu-devel] [Qemu-block] Guest unresponsive after Virtqueue size exceeded error, Fernando Casas Schössow, 2019/02/01
- Re: [Qemu-devel] [Qemu-block] Guest unresponsive after Virtqueue size exceeded error,
Stefan Hajnoczi <=
- Message not available
- Message not available
- Re: [Qemu-devel] [Qemu-block] Guest unresponsive after Virtqueue size exceeded error, Fernando Casas Schössow, 2019/02/06
- Re: [Qemu-devel] [Qemu-block] Guest unresponsive after Virtqueue size exceeded error, Stefan Hajnoczi, 2019/02/10
- Re: [Qemu-devel] [Qemu-block] Guest unresponsive after Virtqueue size exceeded error, Fernando Casas Schössow, 2019/02/11
- Re: [Qemu-devel] [Qemu-block] Guest unresponsive after Virtqueue size exceeded error, Fernando Casas Schössow, 2019/02/18
- Message not available
- Re: [Qemu-devel] [Qemu-block] Guest unresponsive after Virtqueue size exceeded error, Fernando Casas Schössow, 2019/02/19
- Re: [Qemu-devel] [Qemu-block] Guest unresponsive after Virtqueue size exceeded error, Stefan Hajnoczi, 2019/02/20
- Re: [Qemu-devel] [Qemu-block] Guest unresponsive after Virtqueue size exceeded error, Paolo Bonzini, 2019/02/20
- Re: [Qemu-devel] [Qemu-block] Guest unresponsive after Virtqueue size exceeded error, Fernando Casas Schössow, 2019/02/20