From: Matias Ezequiel Vara Larsen <mvaralar@redhat.com>
To: Demi Marie Obenour <demiobenour@gmail.com>
Cc: virtio-comment <virtio-comment@lists.linux.dev>
Subject: Re: Max number of descriptors in a virtio-blk chain
Date: Wed, 22 Apr 2026 17:38:56 +0200 [thread overview]
Message-ID: <aejrkBlN3VtoNFwx@fedora> (raw)
In-Reply-To: <8a7f186f-f240-4f58-a857-5900a2c0c217@gmail.com>
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)
next prev parent reply other threads:[~2026-04-22 15:39 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-22 8:02 Max number of descriptors in a virtio-blk chain Demi Marie Obenour
2026-04-22 15:38 ` Matias Ezequiel Vara Larsen [this message]
2026-04-22 18:11 ` Stefan Hajnoczi
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