linux-kernel - Re: BUG() in 2.6.28-rc8-git2 under heavy load

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Message-ID: <20081222122433.GA27124@elte.hu>
Date:	Mon, 22 Dec 2008 13:24:33 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Vegard Nossum <vegard.nossum@...il.com>,
	Jeff Garzik <jgarzik@...ox.com>
Cc:	Brad Campbell <brad@...p.net.au>,
	Manfred Spraul <manfred@...orfullife.com>,
	Andi Kleen <andi@...stfloor.org>,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: BUG() in 2.6.28-rc8-git2 under heavy load


* Vegard Nossum <vegard.nossum@...il.com> wrote:

> On Mon, Dec 22, 2008 at 9:14 AM, Brad Campbell <brad@...p.net.au> wrote:
> > I got a number of BUG()s in my kernel log during a RAID expansion. I did not
> > notice any ill effects, the system recovered well and has been ok since.
> > I've not had the opportunity to reboot as yet, but I thought them worth
> > reporting.
> >
> > I'm really unsure as to the relevant details on this one, so I've attached
> > everything just in case.
> >
> > I'm also seeing *loads* of [158921.049256] eth0: too many iterations (6) in
> > nv_nic_irq.
> 
> This might be related. You may try to change the max_interrupt_work 
> module parameter to something greater, e.g. 
> forcedeth.max_interrupt_work=50 on the kernel command line or "modprobe 
> forcedeth max_interrupt_work=50" in the terminal.

btw., that default limit of 6 is ridiculously low - i see it trigger on 
all forcedeth boxes i have, under benign load situations - all the time. 
Could someone please send a patch to Jeff that raises it to 50 ?

	Ingo
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