netdev - Re: [net 1/2] e1000e: MSI interrupt test failed, using legacy interrupt

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Message-ID: <1335369547.2602.3.camel@bwh-desktop.uk.solarflarecom.com>
Date:	Wed, 25 Apr 2012 16:59:07 +0100
From:	Ben Hutchings <bhutchings@...arflare.com>
To:	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
CC:	<davem@...emloft.net>,
	Prasanna S Panchamukhi <ppanchamukhi@...erbed.com>,
	<netdev@...r.kernel.org>, <gospo@...hat.com>, <sassmann@...hat.com>
Subject: Re: [net 1/2] e1000e: MSI interrupt test failed, using legacy
 interrupt

On Tue, 2012-04-24 at 22:55 -0700, Jeff Kirsher wrote:
> From: Prasanna S Panchamukhi <ppanchamukhi@...erbed.com>
> 
> Following logs where seen on Systems with multiple NICs,
> while using MSI interrupts as shown below:
[...]
> This patch fixes this problem by increasing the msleep from 50 to 100.
[...]

It probably doesn't, in general.  The out-of-tree version of the sfc
driver used to perform an interrupt test during probe, and after fixing
it up repeatedly I eventually had to remove it completely as there are
so many ways to get a false negative.  Also see the related commit
93e5dfa59b0e26a145a8adce5c9edf50bdaef4c7 ('sfc: Raise self-test
timeouts').

Ben.

-- 
Ben Hutchings, Staff Engineer, Solarflare
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.

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