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Message-ID: <1357884213.5716.35.camel@marge.simpson.net> Date: Fri, 11 Jan 2013 07:03:33 +0100 From: Mike Galbraith <bitbucket@...ine.de> To: Shawn Bohrer <sbohrer@...advisors.com> Cc: Steven Rostedt <rostedt@...dmis.org>, linux-kernel@...r.kernel.org, mingo@...e.hu, peterz@...radead.org Subject: Re: kernel BUG at kernel/sched_rt.c:493! On Fri, 2013-01-11 at 06:22 +0100, Mike Galbraith wrote: > On Thu, 2013-01-10 at 13:58 -0600, Shawn Bohrer wrote: > > > Here is the output: > > > > [ 81.278842] SysRq : Changing Loglevel > > [ 81.279027] Loglevel set to 9 > > [ 83.285456] Initial want: 50000000 rt_b->rt_runtime: 950000000 rt_rq->rt_runtime: 900000000 > > [ 85.286452] Initial want: 50000000 rt_b->rt_runtime: 950000000 rt_rq->rt_runtime: 900000000 > > [ 85.289625] Initial want: 50000000 rt_b->rt_runtime: 950000000 rt_rq->rt_runtime: 900000000 > > [ 87.287435] Initial want: 100000000 rt_b->rt_runtime: 950000000 rt_rq->rt_runtime: 850000000 > > [ 87.290718] Initial want: 50000000 rt_b->rt_runtime: 950000000 rt_rq->rt_runtime: 900000000 > > [ 89.288469] Initial want: -50000000 rt_b->rt_runtime: 950000000 rt_rq->rt_runtime: 1000000000 > > [ 89.291550] Initial want: 150000000 rt_b->rt_runtime: 950000000 rt_rq->rt_runtime: 800000000 > > [ 89.292940] Initial want: 100000000 rt_b->rt_runtime: 950000000 rt_rq->rt_runtime: 850000000 > > [ 89.294082] Initial want: 100000000 rt_b->rt_runtime: 950000000 rt_rq->rt_runtime: 850000000 > > [ 89.295194] Initial want: 50000000 rt_b->rt_runtime: 950000000 rt_rq->rt_runtime: 900000000 > > [ 89.296274] Initial want: 50000000 rt_b->rt_runtime: 950000000 rt_rq->rt_runtime: 900000000 > > [ 90.959004] [sched_delayed] sched: RT throttling activated > > [ 91.289470] Initial want: 200000000 rt_b->rt_runtime: 950000000 rt_rq->rt_runtime: 750000000 > > [ 91.292767] Initial want: 200000000 rt_b->rt_runtime: 950000000 rt_rq->rt_runtime: 750000000 > > [ 91.294037] Initial want: 200000000 rt_b->rt_runtime: 950000000 rt_rq->rt_runtime: 750000000 > > [ 91.295364] Initial want: 200000000 rt_b->rt_runtime: 950000000 rt_rq->rt_runtime: 750000000 > > [ 91.296355] BUG triggered, want: 200000000 > > [ 91.296355] > > [ 91.296355] rt_rq[7]: > > [ 91.296355] .rt_nr_running : 0 > > [ 91.296355] .rt_throttled : 0 > > [ 91.296355] .rt_time : 0.000000 > > [ 91.296355] .rt_runtime : 750.000000 > > [ 91.307332] Initial want: -50000000 rt_b->rt_runtime: 950000000 rt_rq->rt_runtime: 1000000000 > > [ 91.308440] Initial want: -100000000 rt_b->rt_runtime: 950000000 rt_rq->rt_runtime: 1050000000 > > [ 91.309586] Initial want: -150000000 rt_b->rt_runtime: 950000000 rt_rq->rt_runtime: 1100000000 > > [ 91.310716] Initial want: -200000000 rt_b->rt_runtime: 950000000 rt_rq->rt_runtime: 1150000000 > > [ 91.311707] BUG triggered, want: -200000000 > > [ 91.311707] > > [ 91.311707] rt_rq[6]: > > [ 91.311707] .rt_nr_running : 1 > > [ 91.311707] .rt_throttled : 0 > > [ 91.311707] .rt_time : 307.209987 > > [ 91.311707] .rt_runtime : 1150.000000 > > That makes about as much sense as my crash did. There is no leak, but > cpu found nada. So rd/span is changing on us? So I looked at the locking (yet again), and (for the umpteenth time) see no way in the world that can happen. Hrmph. -Mike -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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