linux-kernel - Re: PCI/e1000 BUG: unable to handle kernel paging request at 0ffff163

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Message-ID: <20120906004134.GA12893@localhost>
Date:	Thu, 6 Sep 2012 08:41:34 +0800
From:	Fengguang Wu <fengguang.wu@...el.com>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	Jiang Liu <jiang.liu@...wei.com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	LKML <linux-kernel@...r.kernel.org>, linux-pci@...r.kernel.org
Subject: Re: PCI/e1000 BUG: unable to handle kernel paging request at 0ffff163

On Wed, Sep 05, 2012 at 11:41:04AM -0700, Yinghai Lu wrote:
> On Tue, Sep 4, 2012 at 11:51 PM, Fengguang Wu <fengguang.wu@...el.com> wrote:
> > Yinghai,
> >
> > There are many kernel paging errors showing up in tree:
> >
> >   git://git.kernel.org/pub/scm/linux/kernel/git/yinghai/linux-yinghai.git for-pci-for-each-res-addon-v2
> >
> > The below summary shows that
> >
> > 1) it's a reliably reproducible bug
> > 2) all paging fault happens at address 0ffff163 and in some e1000 functions
> >
> > I'll try to bisect if the root cause is not obvious to you.  (Cannot
> > do so for now because there are 3 bisections on the way and I cannot
> > afford more..)
> 
> thanks, will check that...
> 
> the 32bit kernel as kvm gust, and host is doing pci passthrough to
> export the VF to the KVM guest?

No I didn't do anything special for PCI passthrough. I just used KVM's
emulated e1000 device.

btw, I'll be able to start bisection after several hours.

Thanks,
Fengguang
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