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    SubjectRe: [PATCH -tip 3/3] x86, mce: Add mce=nopoll option to disable timer polling
    Andi Kleen wrote:
    >>> Also I'm not sure a boot argument is really needed. Isn't it
    >>> good enough to do this early at boot through sysfs?
    >> Maybe it is good for this option, as far as polling never run
    >> so soon. Because sysfs is available after start of polling
    >> timer, boot argument is required just in theory of logics.
    >
    > I think the best way would be to just not run mcelog if you want
    > the BIOS to log all. The only problem I guess is that users might be confused
    > by the printk. So perhaps just do a patch to shut down the printk?

    How to prevent banks from clearing?

    >> One another problem is that there are multiple documentations for
    >> machinecheck parameters, but not linked well:
    >>
    >> - Documentation/kernel-parameters.txt
    >> ("See Documentation/x86/x86_64/boot-options.txt" for "mce=")
    >> - Documentation/x86/x86_64/boot-options.txt
    >> ("AMD64 specific boot options" is not true now!)
    >> - Documentation/x86/x86_64/machinecheck
    >> (which I had not noticed the existence at first, oops!)
    >
    > machinecheck is for the sysfs interface, boot options is for the boot parameters.
    >
    > I guess a reference could be added to machinecheck to point to boot-options.txt

    Vice verse, I suppose.
    boot-options.txt just have "Everything else is in sysfs now." without pointing
    machinecheck that describe the sysfs well.


    Thanks,
    H.Seto



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