netdev - RE: [PATCH] ixgbe: Introduce new 10GbE driver for Intel 82598 based PCI Express adapters...

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Message-ID: <E35F4F4D7F6C9E4E826FEC1F86CEF583041934FE@orsmsx412.amr.corp.intel.com>
Date:	Mon, 2 Jul 2007 17:08:42 -0700
From:	"Veeraiyan, Ayyappan" <ayyappan.veeraiyan@...el.com>
To:	"Christoph Hellwig" <hch@...radead.org>,
	"Stephen Hemminger" <shemminger@...ux-foundation.org>
Cc:	"Jeff Garzik" <jeff@...zik.org>, <netdev@...r.kernel.org>,
	"Kok, Auke-jan H" <auke-jan.h.kok@...el.com>,
	<arjan@...ux.intel.com>, <akpm@...ux-foundation.org>
Subject: RE: [PATCH] ixgbe: Introduce new 10GbE driver for Intel 82598 based PCI	Express adapters...

On 7/2/07, Christoph Hellwig <hch@...radead.org> wrote:
> 
> But that'll require the single receiver queue version I guess.  The
> netdevice abuse is the only really major issue I see, although I'd of
> course really like to see the driver getting rid of the bitfield abuse
> aswell.

The submitted driver code supports single queue version in case of MSIX
allocation failures... As I said in the other mail, I feel, restricting
to single Rx queue in NAPI mode is better approach till Stephen's and
DaveM' work of separating NAPI from netdevice is done..

> Lots of drivers where the interface name is assigned after request_irq
> just use an internal name, e.g. ixgbeX in the case of this driver.
> 

This sounds ok to me. 

With this change, this is the output..

[root@...apsz src]# ip link
1: lo: <LOOPBACK,UP,10000> mtu 16436 qdisc noqueue
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: sit0: <NOARP> mtu 1480 qdisc noop
    link/sit 0.0.0.0 brd 0.0.0.0
3: eth6: <BROADCAST,MULTICAST,UP,10000> mtu 1500 qdisc pfifo_fast qlen
1000
    link/ether 00:50:8b:05:5f:95 brd ff:ff:ff:ff:ff:ff
29: eth0: <BROADCAST,MULTICAST,UP,10000> mtu 1500 qdisc pfifo_fast qlen
1000
    link/ether 00:1b:21:01:e4:93 brd ff:ff:ff:ff:ff:ff
30: eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop qlen 1000
    link/ether 00:1b:21:01:e4:92 brd ff:ff:ff:ff:ff:ff

[root@...apsz src]# cat /proc/interrupts | grep 29
214:          0          0   PCI-MSI-edge      ixgbe29-lsc
215:      11764      80213   PCI-MSI-edge      ixgbe29-rx7
216:      80257          0   PCI-MSI-edge      ixgbe29-rx6
217:      77331          0   PCI-MSI-edge      ixgbe29-rx5
218:      24201          0   PCI-MSI-edge      ixgbe29-rx4
219:      52911          0   PCI-MSI-edge      ixgbe29-rx3
220:     104591          0   PCI-MSI-edge      ixgbe29-rx2
221:      80249          8   PCI-MSI-edge      ixgbe29-rx1
222:         14          0   PCI-MSI-edge      ixgbe29-rx0
223:     194023     118220   PCI-MSI-edge      ixgbe29-tx0 

Ayyappan
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