Re: [PATCH v6 09/17] virtio: add minimal support for virtqueues

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Il 11/07/2014 10:19, Andrew Jones ha scritto:
+static struct virtqueue *vm_setup_vq(struct virtio_device *vdev,
+				     unsigned index,
+				     void (*callback)(struct virtqueue *vq),
+				     const char *name)
+{
+	struct virtio_mmio_device *vm_dev = to_virtio_mmio_device(vdev);
+	struct vring_virtqueue *vq;
+	void *queue;
+	unsigned num = VIRTIO_MMIO_QUEUE_NUM_MIN;
+
+	vq = alloc(sizeof(*vq));

You can move the allocation of vq to vm_find_vqs (interleaving alloc and alloc_aligned causes some fragmentation), allocating a single block instead of one per vq.

Paolo

+	queue = alloc_aligned(VIRTIO_MMIO_QUEUE_SIZE_MIN, PAGE_SIZE);

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