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From: | Luigi Rizzo |
Subject: | Re: [Qemu-ppc] [Qemu-devel] [PATCH V5 16/18] virtio-pci: increase the maximum number of virtqueues to 513 |
Date: | Tue, 7 Apr 2015 20:06:14 +0200 |
On 04/01/2015 10:15 AM, Jason Wang wrote:
This patch increases the maximum number of virtqueues for pci from 64
to 513. This will allow booting a virtio-net-pci device with 256 queue
pairs.
...
* configuration space */
#define VIRTIO_PCI_CONFIG_SIZE(dev) VIRTIO_PCI_CONFIG_OFF(msix_enabled(dev))
-#define VIRTIO_PCI_QUEUE_MAX 64
+#define VIRTIO_PCI_QUEUE_MAX 513
513 is an interesting number. Any particular reason for it? Maybe this was mentioned before and I just missed it ;)
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