Messages in this thread | | | From | Bjorn Helgaas <> | Date | Wed, 30 Jan 2013 10:27:42 -0700 | Subject | Re: Uhhuh. NMI received for unknown reason 2c on CPU 0. |
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On Tue, Jan 29, 2013 at 8:42 PM, Borislav Petkov <bp@alien8.de> wrote: > On Tue, Jan 29, 2013 at 02:32:56PM -0700, Bjorn Helgaas wrote: >> Konstantin has some fixes for an e1000e power management issue related >> to suspend/resume that he observed on an x220. He didn't see an NMI, >> and apparently his problem has been around for a long time, > > Yeah, this is one of those issues you don't see *every* s/r cycle and > besides, I just got this box and haven't run 3.{6,7} on it yet (maybe > never will :-)). > >> so no idea whether it could be related. I just noticed the conjunction >> of thinkpad/e1000e/resume/power saving in both reports. >> >> https://lkml.org/lkml/2013/1/18/147 > > Yes, thanks Bjorn, that was a good suggestion. Btw, from reading the > thread, those patches still need cooking a bit more, AFAICR people's > objections/comments. Or should I go ahead and test them?
You're right, I don't think we're quite ready to merge those patches. But if your NMI is easy to reproduce, it might be worth removing e1000e altogether to see if it still happens. I noticed in your original log that the NMI occurred 5 seconds after the e1000e message, and I could imagine some CPU or PCI response timeout being 5 seconds.
> It's just that I'm overly cautious every time I hear e1000e is involved: > > www.linux-magazine.com/content/download/62169/484085/file/Security_Lessons_Ftrace.pdf
Thanks for the pointer, that was an interesting read :)
Bjorn
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