netdev - Re: r8169 regression: UDP packets dropped intermittantly

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Message-ID: <20151117232108.GC3362@electric-eye.fr.zoreil.com>
Date:	Wed, 18 Nov 2015 00:21:08 +0100
From:	Francois Romieu <romieu@...zoreil.com>
To:	Jonathan Woithe <jwoithe@...ad.com.au>
Cc:	netdev@...r.kernel.org
Subject: Re: r8169 regression: UDP packets dropped intermittantly

Jonathan Woithe <jwoithe@...ad.com.au> :
[...]
> It would be advantageous if we could upgrade this Linux system to a kernel
> more recent than 2.6.35.11, but that will require a resolution to this
> problem.  Since 2.6.35.11 works while current kernels do not, the only other
> option is to stick with 2.6.35.11.  Is there anything we can do to try to
> track down the problem?  I'm willing and able to run further tests on the
> system as required.

If you were tracking the hardware stats (ethtool -S), would you be able to
tell if the hardware sees the relevant UDP packets long before the driver
does ?

Would you be able to ascertain that the interrupt mask register (ethtool -d)
is not set for an excessive amount of time ?

-- 
Ueimor
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