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    SubjectRe: Clocksource tsc is always unstable with 2.6.25-* kernels and CONFIG_NO_HZ=y on my box
    Gabriel C wrote:
    > Hi,
    >
    > I noticed tsc is always marked unstable on my box with 2.6.25* , 2.6.24 is fine.
    >
    > ..
    >
    > [ 0.825760] ACPI: PCI Interrupt 0000:03:0e.0[A] -> GSI 22 (level, low) -> IRQ 22
    > [ 0.805755] Switched to high resolution mode on CPU 1
    > [ 0.794244] Switched to high resolution mode on CPU 2
    > [ 0.766968] Switched to high resolution mode on CPU 3
    > [ 1.083944] Switched to high resolution mode on CPU 0
    > [ 15.388792] Clocksource tsc unstable (delta = 9373391604 ns)
    > [ 15.714648] Time: acpi_pm clocksource has been installed.
    >
    > ..
    >
    > Booting nohz=off fixes that.
    >
    > Another strange thing is when I try to boot that kernel with clocksource=acpi_pm it just hangs.
    >
    > config is attached.
    >
    > Please let me know if you need more infos / want me to try patches or anything else.

    Please post your full dmesg output.


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