linux-kernel - Re: Revert "gro: Fix legacy path napi

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Message-Id: <20090324.141702.206697701.davem@davemloft.net>
Date:	Tue, 24 Mar 2009 14:17:02 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	mingo@...e.hu
Cc:	herbert@...dor.apana.org.au, r.schwebel@...gutronix.de,
	torvalds@...ux-foundation.org, blaschka@...ux.vnet.ibm.com,
	tglx@...utronix.de, a.p.zijlstra@...llo.nl,
	linux-kernel@...r.kernel.org, kernel@...gutronix.de
Subject: Re: Revert "gro: Fix legacy path napi_complete crash",

From: Ingo Molnar <mingo@...e.hu>
Date: Tue, 24 Mar 2009 21:54:44 +0100

> * Ingo Molnar <mingo@...e.hu> wrote:
> 
> > > Same forcedeth box i reported before. Config below. (note: if 
> > > you want to use it you need to run it through 'make oldconfig', 
> > > with all defaults accepted)
> > 
> > Hm, i just had a test failure (hung interface) with this too.
> > 
> > I'll go back to the original straight revert of "303c6a0: gro: Fix 
> > legacy path napi_complete crash", and will test it overnight - to 
> > establish a baseline of stability again. (to make sure there are 
> > no other bugs interacting)
> 
> FYI, this plain revert is holding up fine in my tests so far - 50 
> random iterations - the previous one failed after 5 iterations.

Something must be up with respect to letting interrupts in during
certain windows of time, or similar.

I'll take a look at this and hopefully Herbert or myself will be
able to figure it out.
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