netdev - Re: netxen: box stuck in netxen_napi

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Message-ID: <1421909520.3471.2.camel@edumazet-glaptop2.roam.corp.google.com>
Date:	Wed, 21 Jan 2015 22:52:00 -0800
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Mike Galbraith <umgwanakikbuti@...il.com>
Cc:	netdev <netdev@...r.kernel.org>
Subject: Re: netxen: box stuck in netxen_napi_disable()

On Thu, 2015-01-22 at 07:15 +0100, Mike Galbraith wrote:
> On Wed, 2015-01-21 at 21:57 -0800, Eric Dumazet wrote:
> 
> > This driver doesn't follow the NAPI model correctly.
> > 
> > Please try following fix :
> 
> Thanks Eric, I'll plug it in in a bit and poke at it.  No news is good
> news, as good as news gets for unknown repeatability bugs that is ;-)

To trigger the bug, all you had to do was to stress the transmit side.

You could reduce MAX_STATUS_HANDLE from 64 to 4 to trigger it even
faster.

I'll send an official patch tomorrow morning.

Thanks !


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