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Date: Sat, 7 Nov 2009 20:01:16 +0100 From: "Rafael J. Wysocki" <rjw@...k.pl> To: Peter Zijlstra <peterz@...radead.org> Cc: Kevin Winchester <kjwinchester@...il.com>, Mike Galbraith <efault@....de>, Ingo Molnar <mingo@...e.hu>, LKML <linux-kernel@...r.kernel.org>, Steven Rostedt <rostedt@...dmis.org>, Andrew Morton <akpm@...ux-foundation.org>, "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>, Yinghai Lu <yinghai@...nel.org> Subject: Re: Intermittent early panic in try_to_wake_up On Saturday 07 November 2009, Peter Zijlstra wrote: > On Sat, 2009-11-07 at 12:24 -0400, Kevin Winchester wrote: > > Mike Galbraith wrote: > > > On Fri, 2009-11-06 at 19:49 -0400, Kevin Winchester wrote: > > > > > >> The patch below does not apply to mainline, unless I'm doing something wrong. > > >> It's against -tip, I assume? Is it just as applicable to mainline? > > > > > > It was mainline, but I had the scheduler pull request and another in for > > > testing as well. Linus has pulled, so it'll apply now, with offsets. > > > > > > > It did end up applying, but did not have any effect. Looking at the patch > > again, I see that it appears to only affect CONFIG_SMP, which I am not > > running (and in fact it adds a build warning for the !SMP case). So there > > was not much chance of it fixing anything, I suppose. > > > > Any other ideas? I don't have a serial console, and the trace scrolls off > > my console, so I don't know if any debug printks would help. Would it help > > if I copied the entire panic message entirely, including the Code section? > > I can try that the next time it happens. > > Use vga=ask boot_delay=100 select the highest res possible. > > Possibly you could use a digital (video) camera to record the output. FWIW, I see a crash in autoremove_wake_function() during resume from suspend to RAM that happens immediately before the thawing of tasks. It always happens in the "events" thread. I can trigger it quite reliably, although not 100% of the time. I can only see the bottom half of the call trace, so I can't really say what kind of a crash this is. Also, for quite some time I've been observing a resume-from-hibernation crash during the final switch from a VT to X that could also be explained by a problem with "events". Best, Rafael -- 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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