Messages in this thread | | | From | "Rafael J. Wysocki" <> | Subject | Re: Uhhuh. NMI received for unknown reason 2c on CPU 0. | Date | Thu, 31 Jan 2013 14:12:58 +0100 |
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On Thursday, January 31, 2013 09:14:00 AM Jiri Slaby wrote: > On 01/31/2013 08:09 AM, Borislav Petkov wrote: > > On Thu, Jan 31, 2013 at 01:54:56AM +0100, Rafael J. Wysocki wrote: > >> On Thursday, January 31, 2013 12:47:40 AM Jiri Slaby wrote: > >>> On 01/31/2013 12:12 AM, Jiri Slaby wrote: > >>>> I think I will start with commenting parts of `power' script to see > >>>> exactly which of the power savings cause this. > >>> > >>> ... NMI watchdog. If I remove it from the script, the problem > >>> disappears. If I try it alone, I have those NMIs. > >> > >> Well, beats me. :-( > >> > >> I suspect that it doesn't quiesce itself sufficiently before image restoration > >> and we get some crosstalk between the boot kernel and the image kernel. > > > > Well, I did what Jiri said causes it: > > > > echo 0 > /proc/sys/kernel/nmi_watchdog > > > > No NMI. > > > > BUT(!), if I start powertop and set all tunables in the "Tunables" tab > > to "Good", then suspend to disk, when I resume I get the NMI and this > > time the unknown reason is 0x3c. Sounds like this needs bisection... > > Btw, this is latest -rc5 + tip/master and Jiri triggers it on 3.7-stable > > ... > > And 3.6(.0) was the first one I _tried_ and had that issue too. Not sure > if there is any bisect-good kernel to start with. > > > Btw, this e1000e thing has another problem: when I unplug the network > > cable and replug it again, it cannot ping local network anymore. > > Normally, when you plug the network cable back in, it does some sort if > > link detection saying eth link is back up but it doesn't say it on that > > box - only a reboot fixes it. Hmm. > > I think this is what Konstantin fixes with his patches.
Yes, there are two bugs in e1000e, it appears. Konstantin's patch [2/5] fixes one of them, but the other one has to be fixed differently.
Boris, would you be able to test a couple of e1000e patches for me?
Rafael
-- I speak only for myself. Rafael J. Wysocki, Intel Open Source Technology Center.
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