linux-kernel - RE: [E1000-devel] [in-tree drivers] freezing e1000e in 2.6.31 (SMP only? MSI? PAUSE!)

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Date:	Mon, 9 Nov 2009 17:19:14 -0800
From:	"Allan, Bruce W" <bruce.w.allan@...el.com>
To:	Nix <nix@...eri.org.uk>,
	"Tantilov, Emil S" <emil.s.tantilov@...el.com>
CC:	"e1000-devel@...ts.sourceforge.net" 
	<e1000-devel@...ts.sourceforge.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [E1000-devel] [in-tree drivers] freezing e1000e in 2.6.31 (SMP
	only? MSI? PAUSE!)

Not a fix, but a workaround.

It's not your gigabit switch either; it's a bug in the driver introduced in 2.6.30...sorry about that.  I'm working on a fix now that should be submitted upstream in the next few days.

Sorry for any inconvenience,
Bruce.

>-----Original Message-----
>From: Nix [mailto:nix@...eri.org.uk]
>Sent: Monday, November 09, 2009 4:09 PM
>To: Tantilov, Emil S
>Cc: e1000-devel@...ts.sourceforge.net; linux-kernel@...r.kernel.org
>Subject: Re: [E1000-devel] [in-tree drivers] freezing e1000e in 2.6.31
>(SMP only? MSI? PAUSE!)
>
>On 8 Nov 2009, nix@...eri.org.uk told this:
>
>> On 6 Nov 2009, Emil S. Tantilov verbalised:
>>> Also try disabling Tx pause frames:
>>> ethtool -A fastnet tx off autoneg off
>>
>> Trying that now. No freezes yet, but I haven't really given it long
>> enough.
>
>I just did a large number of kernel-build-and-installs with frame
>pointers over NFS over the errant link. No problems at all.
>
>I think we can say this fixes it (works around it?)
>
>Does this implicate the gigabit switch I'm talking to, or is it a kernel
>bug? (It looks like the cheap Realteks at the other ends of this link
>don't support pause frames at all: at least ethtool -a gives
>-EOPNOTSUPP, but maybe they simply can't be turned off... hm, r8169.c
>vaguely suggests that it supports them but can't turn them off without
>source hacking.)
>
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