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

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Date:	Fri, 16 Jul 2010 22:25:57 +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 22:09 +0300, Maxim Levitsky wrote:
> 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)
And forgot to add, that it did work.

> 
> 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.
Tested, broken as expected.




Best regards,
	Maxim Levitsky




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