Re: Max number of descriptors in a virtio-blk chain

Hello,

On Wed, Apr 22, 2026 at 04:02:06AM -0400, Demi Marie Obenour wrote:
> Is there a limit to the number of descriptors that a virtio-blk driver
> can use in a request?  In at least Cloud Hypervisor's implementation,

I think this is limited to the number of descriptors that you expose to
the device in the descriptor ring. In addition, I think the index is 16
bits long.

Matias

> and I suspect others, the device must allocate an array of iovecs as
> long as the number of descriptors.
> -- 
> Sincerely,
> Demi Marie Obenour (she/her/hers)