netdev - Re: [PATCH] e1000e: MSI interrupt test failed, using legacy interrupt

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Date:	Thu, 26 Apr 2012 17:20:35 -0700
From:	Jeff Kirsher <tarbal@...il.com>
To:	prasanna.panchamukhi@...erbed.com
CC:	bruce.w.allan@...el.com, jeffrey.t.kirsher@...el.com,
	jeffrey.e.pieper@...el.com, bhutchings@...arflare.com,
	gospo@...hat.com, sassmann@...hat.com, jesse.brandeburg@...el.com,
	e1000-devel@...ts.sourceforge.net, netdev@...r.kernel.org
Subject: Re: [PATCH] e1000e:  MSI interrupt test failed, using legacy interrupt

On 04/26/2012 05:05 PM, prasanna.panchamukhi@...erbed.com wrote:
> From: Prasanna S. Panchamukhi <ppanchamukhi@...erbed.com>
>
> Following logs where seen on Systems with multiple NICs & ports,
> while using MSI interrupts as shown below:
>
> Feb 16 15:09:32 (none) user.notice kernel: 0000:00:0d.0: lan0_0: NIC Link is Up
> 1000 Mbps Full Duplex, Flow Control: RX/TX
> Feb 16 15:09:32 (none) user.notice kernel: 0000:40:0d.0: wan0_1: NIC Link is Up
> 1000 Mbps Full Duplex, Flow Control: RX/TX
> Feb 16 15:09:32 (none) user.notice kernel: 0000:40:0d.0: lan0_1: NIC Link is Up
> 1000 Mbps Full Duplex, Flow Control: RX/TX
> Feb 16 15:09:32 (none) user.warn kernel: 0000:40:0e.0: wan4_0: MSI interrupt
> test failed, using legacy interrupt.
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> Feb 16 15:09:32 (none) user.notice kernel: 0000:00:0e.0: wan1_0: NIC Link is Up
> 1000 Mbps Full Duplex, Flow Control: RX/TX
> Feb 16 15:09:33 (none) user.notice kernel: 0000:00:0e.0: lan1_0: NIC Link is Up
> 1000 Mbps Full Duplex, Flow Control: RX/TX
> Feb 16 15:09:33 (none) user.notice kernel: 0000:00:0f.0: wan2_0: NIC Link is Up
> 1000 Mbps Full Duplex, Flow Control: RX/TX
> Feb 16 15:09:33 (none) user.notice kernel: 0000:00:0f.0: lan2_0: NIC Link is Up
> 1000 Mbps Full Duplex, Flow Control: RX/TX
> Feb 16 15:09:33 (none) user.notice kernel: 0000:40:0a.0: wan3_0: NIC Link is Up
> 1000 Mbps Full Duplex, Flow Control: RX/TX
> Feb 16 15:09:33 (none) user.notice kernel: 0000:40:0a.0: lan3_0: NIC Link is Up
> 1000 Mbps Full Duplex, Flow Control: RX/TX
> Feb 16 15:09:34 (none) user.notice kernel: 0000:40:0e.0: lan4_0: NIC Link is Up
> 1000 Mbps Full Duplex, Flow Control: RX/TX
> Feb 16 15:09:34 (none) user.notice kernel: 0000:40:0f.0: wan5_0: NIC Link is Up
> 1000 Mbps Full Duplex, Flow Control: RX/TX
> Feb 16 15:09:34 (none) user.notice kernel: 0000:40:0f.0: lan5_0: NIC Link is Up
> 1000 Mbps Full Duplex, Flow Control: RX/TX
>
> This patch changes the IRQ tests to use polling loops starting with a
> delay of 1 tick and doubling that if necessary up to a maximum total
> delay of approximately 1 second.
>
> Signed-off-by: Prasanna S. Panchamukhi <ppanchamukhi@...erbed.com>
> ---
>  drivers/net/ethernet/intel/e1000e/netdev.c |   27 +++++++++++++++++++++++----
>  1 files changed, 23 insertions(+), 4 deletions(-)
Thanks Prasanna, Dave did accept the previous patch, so does this patch
take that into account?



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