netdev - RE: [REGRESSION] e1000e stopped working [MANUALLY BISECTED]

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Date:	Thu, 15 Jul 2010 22:09:05 +0300
From:	Maxim Levitsky <maximlevitsky@...il.com>
To:	"Tantilov, Emil S" <emil.s.tantilov@...el.com>
Cc:	"Kirsher, Jeffrey T" <jeffrey.t.kirsher@...el.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"Allan, Bruce W" <bruce.w.allan@...el.com>,
	"Pieper, Jeffrey E" <jeffrey.e.pieper@...el.com>
Subject: RE: [REGRESSION] e1000e stopped working [MANUALLY BISECTED]

On Thu, 2010-07-15 at 13:02 -0600, Tantilov, Emil S wrote:
> Maxim Levitsky wrote:
> > On Thu, 2010-07-15 at 02:33 +0300, Maxim Levitsky wrote:
> >> On Wed, 2010-07-14 at 16:56 -0600, Tantilov, Emil S wrote:
> >>> Maxim Levitsky wrote:
> >>>> On Mon, 2010-07-12 at 15:23 -0600, Tantilov, Emil S wrote:
> >>>>> Maxim Levitsky wrote:
> >>>>>> On Mon, 2010-07-05 at 12:58 +0300, Maxim Levitsky wrote:
> >>>>>>> On Mon, 2010-07-05 at 01:13 -0700, Jeff Kirsher wrote:
> >>>>>>>> On Sun, Jul 4, 2010 at 15:48, Maxim Levitsky
> >>>>>>>> <maximlevitsky@...il.com> wrote:
> >>>>>>>>> Did few guesses, and now I see that reverting the below
> >>>>>>>>> commit fixes the problem. 
> >>>>>>>>> 
> >>>>>>>>> "e1000e: Fix/cleanup PHY reset code for ICHx/PCHx"
> >>>>>>>>> e98cac447cc1cc418dff1d610a5c79c4f2bdec7f.
> >>>>>>>>> 
> >>>>>>>>> 
> >>>>>>>>> Best regards,
> >>>>>>>>>        Maxim Levitsky
> >>>>>>>>> 
> >>>>>>>>> --
> >>>>>>>> 
> >>>>>>>> Can you give us till Tuesday to respond?  I know that there are
> >>>>>>>> some additional e1000e patches in my queue, which may resolve
> >>>>>>>> the issue, but this weekend the power is down to do some
> >>>>>>>> infrastructure upgrades which prevents us from doing any
> >>>>>>>> investigation.debugging until Tuesday.
> >>>>>>>> 
> >>>>>>> 
> >>>>>>> Sure.
> >>>>>>> 
> >>>>>>> Best regards,
> >>>>>>> 	Maxim Levitsky
> >>>>>>> 
> >>>>>> 
> >>>>>> Updates?
> >>>>> 
> >>>>> We are working on reproducing the issue. So far we have not seen
> >>>>> the problem when testing with net-next.
> >>>>> 
> >>>>> I asked in previous email about some additional info from ethtool
> >>>>> (-d, -e, -S) and kernel config. That would help us to narrow it
> >>>>> down. 
> >>>>> 
> >>>>> Thanks,
> >>>>> Emil
> >>>> I did send -e and -d output.
> >>> 
> >>> Sorry, looks like I lost the email with the attachements.
> >>> 
> >>> Could you provide the output of dmesg after the failure occurs?
> >>> 
> >>>> Since you probably want -S output during failure, I need to
> >>>> recompile kernel for that. I will do that soon.
> >>>> 
> >>>> 
> >>>> One question, in two weeks I hope 2.6.35 won't be released?
> >>>> If so, I will have enough free time then to narrow down this issue.
> >>>> 
> >>>> Other solution, is to revert this commit.
> >>>> (I have never seen this problem with it reverted).
> >>> 
> >>> We have been running reboot tests on 2 separate systems with recent
> >>> net-next kernels using your config and so far no luck in
> >>> reproducing this issue. 
> >>> 
> >>> What is the make model of your system (or MB)?
> >> 
> >> the motherboard is Intel DG965RY.
> >> 
> >> However, I am using vanilla kernel.
> >> net-next might contain further fixes.
> >> 
> >> I see if net-next works here.
> > 
> > Yep, net-next works here.
> > 
> > 
> > I have the problem on vanilla kernel.
> > Last revision of it, I tested is 2.6.35-rc4 exactly
> > (815c4163b6c8ebf8152f42b0a5fd015cfdcedc78)
> > 
> > 
> > Maybe vanilla git master works, I test it too soon.
> 
> Thanks for the information! Good to know that this issue does not exist in the latest branch.
> 
> Have you by any chance tested a stable branch (2.6.34.x)?

I only did test plain 2.6.34 (v2.6.34)

Also I repeat that revert of e98cac447cc1cc418dff1d610a5c79c4f2bdec7f 
(e1000e: Fix/cleanup PHY reset code for ICHx/PCHx) fixes the bug on
vanilla kernel.

Also I just pulled latest vanilla git, and I according to diffstat I see
no changes in e1000e, so its likely that bug remains there.
I will test that soon.



Best regards,
	Maxim Levitsky


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