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Date: Fri, 8 Apr 2011 07:29:21 +0200 From: Michael Guntsche <mike@...loops.com> To: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> Subject: [2.6.39-rc[12]] hangs during boot Good morning list, I just tried 2.7.39-rc2 and then rc1 on one of my systems. 2.6.38 runs without an issue on this hardware but with 2.6.39-rc[12] the system crawls to a halt during the boot process. I manages to reach the end of runlevel S but then it grinds to a halt. Waiting long enough I get a hung task warning sooner or later. If I then hit a SYSRQ combo for blocked tasks (which is empty btw) it seems to continue a little bit but awfully slow. The problem with debugging this right now is twofold. First of all, for some odd reason I do not get output on the serial console during boot (to capture the SYSRQ info), second this is running on a software RAID-5 so every forced reboot out of this state results in a complete resync of the whole array. I know this could be everything, IRQ, block layer problem etc, so maybe someone has an idea how I can figure out, what's going on exactly apart from bisecting between 38 and 39-rc1 On a side note since I read similar reports already. This is a happening with a CONFIG_NO_HZ/TICK_ONESHOT non-PREEMPT kernel. Kind regards, Michael Guntsche -- 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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