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Date: Sun, 10 Jul 2011 21:30:58 +0100 From: julie Sullivan <kernelmail.jms@...il.com> To: paulmck@...ux.vnet.ibm.com Cc: linux-kernel@...r.kernel.org Subject: Re: PROBLEM: 3.0-rc kernels unbootable since -rc3 > But maybe not that much thought. My current guess is that your > configuration is somehow causing some RCU callbacks to be executed > during early boot, and that these callbacks are attempting to use kernel > features that are not yet initialized. If my guess is correct, then > the reason that enabling RCU_BOOST makes things work is that it prevents > RCU callbacks from executing until after the scheduler is up and running. > > So I added another commit to the jms.2011.07.07a branch in the -rcu > git tree. If my guesses are correct, this will allow your system to > boot, possibly emitting a warning on the way up. When you get a chance > to try this out, please let me know how it goes. > > Thanx, Paul Fantastic, now we boot perfectly! I also tried the same treatment on v3.0-rc5 and -rc6 (i.e. revert f8b7fc6b514f34a51875 and a46e0899eec7a3069bcad then add those 8 commits from the jms.2011.07.07a branch) with the same success. Thanks for giving me back 3.0-rc4, -rc5 and -rc6! Cheers Julie -- 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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