linux-kernel - Re: Oops: 17 SMP ARM (v3.16-rc2)

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Message-ID: <20140825101832.GT30401@n2100.arm.linux.org.uk>
Date:	Mon, 25 Aug 2014 11:18:32 +0100
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Mattis Lorentzon <Mattis.Lorentzon@...oliv.com>
Cc:	Fabio Estevam <festevam@...il.com>,
	Fredrik Noring <fredrik.noring@...oliv.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: Oops: 17 SMP ARM (v3.16-rc2)

On Wed, Aug 13, 2014 at 01:39:27PM +0000, Mattis Lorentzon wrote:
> All our tests seem to behave the same way on the Sabrelite as on our own board.
> A working theory is that the switch (3Com Switch 4400) triggers the degeneration
> of the network stack from which Linux does not seem to recover, even if we later
> bypass the switch and directly connect the board to the server machine.

Please can you try something - what happens if you completely disable
pause frame support (flow control) on all machines on the switch?

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