linux-kernel - RE: [PATCH 2.6.32-rc3] net: VMware virtual Ethernet NIC driver: vmxnet3

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Date:	Fri, 9 Oct 2009 16:52:09 -0700
From:	Shreyas Bhatewara <sbhatewara@...are.com>
To:	Stephen Hemminger <shemminger@...ux-foundation.org>
CC:	linux-kernel <linux-kernel@...r.kernel.org>,
	netdev <netdev@...r.kernel.org>,
	"David S. Miller" <davem@...emloft.net>,
	Jeff Garzik <jgarzik@...ox.com>,
	Anthony Liguori <anthony@...emonkey.ws>,
	Chris Wright <chrisw@...s-sol.org>,
	Greg Kroah-Hartman <greg@...ah.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	virtualization <virtualization@...ts.linux-foundation.org>,
	pv-drivers <pv-drivers@...are.com>
Subject: RE: [PATCH 2.6.32-rc3] net: VMware virtual Ethernet NIC driver:
 vmxnet3

> -----Original Message-----
> From: Stephen Hemminger [mailto:shemminger@...ux-foundation.org]
> Sent: Friday, October 09, 2009 2:36 PM
> To: Shreyas Bhatewara
> Cc: linux-kernel; netdev; David S. Miller; Jeff Garzik; Anthony
> Liguori; Chris Wright; Greg Kroah-Hartman; Andrew Morton;
> virtualization; pv-drivers
> Subject: Re: [PATCH 2.6.32-rc3] net: VMware virtual Ethernet NIC
> driver: vmxnet3
> 
> On Thu, 8 Oct 2009 10:59:26 -0700 (PDT)
> Shreyas Bhatewara <sbhatewara@...are.com> wrote:
> 
> > Hello all,
> >
> > I do not mean to be bothersome but this thread has been unusually
> silent.
> > Could you please review the patch for me and reply with your comments
> /
> > acks ?
> >
> > Thanks.
> > ->Shreyas
> 
> 
> Looks fine, but just a minor style nit (can be changed after insertion
> in mainline).
> 
> The code:
> 
> static void
> vmxnet3_do_poll(struct vmxnet3_adapter *adapter, int budget, int
> *txd_done,
> 		int *rxd_done)
> {
> 	if (unlikely(adapter->shared->ecr))
> 		vmxnet3_process_events(adapter);
> 
> 	*txd_done = vmxnet3_tq_tx_complete(&adapter->tx_queue, adapter);
> 	*rxd_done = vmxnet3_rq_rx_complete(&adapter->rx_queue, adapter,
> budget);
> }
> 
> 
> static int
> vmxnet3_poll(struct napi_struct *napi, int budget)
> {
> 	struct vmxnet3_adapter *adapter = container_of(napi,
> 					  struct vmxnet3_adapter, napi);
> 	int rxd_done, txd_done;
> 
> 	vmxnet3_do_poll(adapter, budget, &txd_done, &rxd_done);
> 
> 	if (rxd_done < budget) {
> 		napi_complete(napi);
> 		vmxnet3_enable_intr(adapter, 0);
> 	}
> 	return rxd_done;
> }
> 
> 
> Is simpler if you just have do_poll return rx done value. Probably Gcc
> inline's it all anyway.
> 
> static int
> vmxnet3_do_poll(struct vmxnet3_adapter *adapter, int budget)
> {
> 	if (unlikely(adapter->shared->ecr))
> 		vmxnet3_process_events(adapter);
> 
> 	vmxnet3_tq_tx_complete(&adapter->tx_queue, adapter);
> 	return vmxnet3_rq_rx_complete(&adapter->rx_queue, adapter,
> budget);
> }
> 
> 
> static int
> vmxnet3_poll(struct napi_struct *napi, int budget)
> {
> 	struct vmxnet3_adapter *adapter = container_of(napi,
> 					  struct vmxnet3_adapter, napi);
> 	int rxd_done;
> 
> 	rxd_done = vmxnet3_do_poll(adapter, budget);
> 	if (rxd_done < budget) {
> 		napi_complete(napi);
> 		vmxnet3_enable_intr(adapter, 0);
> 	}
> 	return rxd_done;
> }



Thanks Stephen.

Yes, the vmxnet3_do_poll() was an inline function in the very first patch. It was thought of as a better idea to let gcc handle the inlining.
I will piggyback this nit on a forthcoming change.

->Shreyas


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