Re: [PATCH RFC 7/8] vsock: preserve host-to-guest datagram boundaries

[Sergio Lopez Pascual]

Bobby Eshleman <bobbyeshleman@xxxxxxxx> writes:

> On Wed, Oct 28, 2026 at 05:04:36PM +0100, Sergio Lopez wrote:
>> Vhost splits large datagrams across guest RX buffers, delivering each
>> fragment as a separate message. Allocate full-size RX buffers with
>> page fragments when datagrams are negotiated, and drop whole datagrams
>> if a guest buffer is too small. Refill empty RX queues even when only
>> one full-size buffer fits in the ring.
>
> I wonder if it might be better to do what seqpacket does, and just split
> the datagram across the buffers (for seqpacket, until the EOM flag is
> seen)? I'd expect that we will get better utilization of our vq buffers
> this way?
>

Yeah, I do like that approach better. I'm going to implement it for v2.

Thanks!
Sergio.