Messages in this thread | | | Date | Tue, 20 Nov 2007 17:20:00 -0600 | From | Jordan Russell <> | Subject | Re: 2.6.23.1: Random hangs during boot with "tsc" clocksource |
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>> On Fri, 02 Nov 2007 12:10:00 -0500 Jordan Russell <jr-list-2007@quo.to> wrote: >> Hi, >> >> With 2.6.23.1 (stock and Fedora), roughly 50% of the time my system >> hangs indefinitely during the kernel boot process. The hangs occur in >> places where normally a brief delay is seen, such as when detecting >> serial ports, ATA devices, and USB hubs. SysRq+W, when it works, shows >> tasks stuck inside schedule_timeout and lock_timer_base. >> >> I've found, however, that if I override the default "tsc" clocksource >> with "acpi_pm" by adding "clocksource=acpi_pm" to the kernel command >> line, the system comes up fine every time. (Zero hangs in ~50 tries.) >> >> I never had to do this with stock kernels based on 2.6.22.10 and >> earlier, which also defaulted to "tsc" on my system. >> >> I came across this thread: >> http://lkml.org/lkml/2007/10/16/339 >> but I'm not sure if it's the same issue. I've never seen a "Clocksource >> tsc unstable" message, and the kernel doesn't appear to unwedge itself >> after 5 minutes (I waited 20 minutes once).
[... snip cpuinfo, dmesg, config ...]
Same problem with 2.6.23.8.
Are there any specific (TSC related?) patches I should try reverting?
Would it help if I captured the dmesg/SysRq output from one of the hanging boots?
Any other information that might be useful in getting to the bottom of this?
Thanks. Jordan Russell - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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