linux-kernel - Re: [PATCH 2/5] hv_sock: Copy packets sent by Hyper-V out of the ring buffer

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Date:   Thu, 21 Apr 2022 17:21:17 +0200
From:   Andrea Parri <parri.andrea@...il.com>
To:     Stefano Garzarella <sgarzare@...hat.com>
Cc:     KY Srinivasan <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Wei Liu <wei.liu@...nel.org>, Dexuan Cui <decui@...rosoft.com>,
        Michael Kelley <mikelley@...rosoft.com>,
        David Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, linux-hyperv@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/5] hv_sock: Copy packets sent by Hyper-V out of the
 ring buffer

> > @@ -378,6 +381,8 @@ static void hvs_open_connection(struct vmbus_channel *chan)
> > 		rcvbuf = ALIGN(rcvbuf, HV_HYP_PAGE_SIZE);
> > 	}
> > 
> > +	chan->max_pkt_size = HVS_MAX_PKT_SIZE;
> > +
> 
> premise, I don't know HyperV channels :-(
> 
> Is this change necessary to use hv_pkt_iter_first() instead of
> hv_pkt_iter_first_raw()?

Yes, the change is required to initialize the buffer which holds the
copies of the incoming packets (in hv_ringbuffer_init()).


> If yes, then please mention that you set this value in the commit message,
> otherwise maybe better to have a separate patch.

Sure, will do.

Thanks,
  Andrea