Control: reassign -1 src:linux 3.16.7-ckt20-1+deb8u3 Control: tag -1 unreproducible moreinfo On Thu, 2016-02-04 at 23:25 -0500, Rich Ercolani wrote: > Package: linux-source-3.16 > Version: 3.16.0-4 > Severity: normal > > Dear Maintainer, > > I was going about my business, using perf top to see what I was spending a > bunch of my time in on this system, when suddenly, I got this written to > console: > > [2425302.546957] Uhhuh. NMI received for unknown reason 11 on CPU 1. > [2425302.547625] Do you have a strange power saving mode enabled? > [2425302.548291] Dazed and confused, but trying to continue > > I've been running this system for several months at this point, and have not > seen this issue at any point prior. > > I can't easily reproduce it again, so it may have been something other than > "perf top" that resulted in the behavior, but that's the only unusual thing > I can think of. [...] perf uses the hardware performance monitoring units (PMUs) which do trigger NMIs periodically. Obviously the kernel should expect and recognise these as related to performance monitoring, but there could be a bug in that code. I'm tagging this report as needing more information as we won't be able to make any progress unless you can find a way to reproduce the bug. Ben. -- Ben Hutchings It is a miracle that curiosity survives formal education. - Albert Einstein
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