Christian Borntraeger wrote:
Rusty,
currently virtio_blk uses one major number per device. While this works
quite well on most systems it is wasteful and will exhaust major numbers
on larger installations.
This patch allocates a major number on init and will use 16 minor numbers
for each disk. That will allow ~64k virtio_blk disks.
There's are some other limitations to the number of virtio block
devices. For instances...
sprintf(vblk->disk->disk_name, "vd%c", virtblk_index++);
This gets bogus after 64 disks. We also have a hard limit for
virtio-pci based on the number of PCI slots available. One thing I was
considering was whether we should try to support multiple disks per
virtio device.
Otherwise, this patch looks good to me.
Regards,
Anthony Liguori
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