Messages in this thread | | | Subject | Re: Long timeout when booting >= 2.6.38 | From | john stultz <> | Date | Mon, 02 May 2011 12:09:35 -0700 |
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On Mon, 2011-05-02 at 20:49 +0200, Christian Hoffmann wrote: > I have a strange hang/timeout when booting kernel 2.6.38 and newer. It > hangs after a few initialization steps and then after 145 seconds, it > continues to boot. > > I bisected kernel and found that offensive revision is: > > 08ec0c58fb8a05d3191d5cb6f5d6f81adb419798 > "x86: Improve TSC calibration using a delayed workqueue" > > Older kernels before above revision work fine. > > When passing acpi=off to kernel, the problem seems to disappear.
Hrm. So, on older kernels, what do you see from: $ cat /sys/devices/system/clocksource/clocksource0/current_clocksource $ cat /sys/devices/system/clocksource/clocksource0/available_clocksource
> Dmesg output below where you can see the jump from 1.47 to 146.85. > > The mainboard is an Asus M4A89GTD PRO/USB3 (latest BIOS revision). > > Kind regards, > Chris > > PS: the problem has also been reported to ubuntu where more hw > information is attached. > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/765230 > PSS: dmesg output
Hrm. The delay in the dmesg logs doesn't really seem to correlate that closely with the delayed tsc calibration. Hrmm..
thanks -john
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