Re: Yet more softlockups.

[Dave Jones]

On Wed, Jul 10, 2013 at 11:39:50AM -0400, Vince Weaver wrote:
 > On Wed, 10 Jul 2013, Dave Jones wrote:
 > 
 > > Something is really fucked up in the kernel side of perf.
 > > I get this right after booting..
 > > 
 > > [  114.516619] perf samples too long (4262 > 2500), lowering kernel.perf_event_max_sample_rate to 50000
 > > 
 > > That's before I even get a chance to log in, so I'm pretty sure perf isn't even being run.
 > > 
 > > And this is just booting up my desktop, not fuzzing.
 > 
 > This is probably related to the problem described in the thread
 >    perf: fix interrupt handler timing harness
 >    http://comments.gmane.org/gmane.linux.kernel/1520775
 > which in theory has a fix.  Not sure why it'd trigger during boot.

Ah, missed that thread. Thanks for the pointer. That looks important,
and might actually explain some of the other oddness I've been seeing.

 > NMI watchdog?

likely.

	Davek


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