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    SubjectRe: 2.6.19-rc5: known regressions (v3)
    Date

    > On a working kernel on an Opteron, we have normally 4 directories
    > in /dev/oprofile :
    >
    > # ls -ld /dev/oprofile/?
    > drwxr-xr-x 1 root root 0 15. Nov 12:38 /dev/oprofile/0
    > drwxr-xr-x 1 root root 0 15. Nov 12:38 /dev/oprofile/1
    > drwxr-xr-x 1 root root 0 15. Nov 12:38 /dev/oprofile/2
    > drwxr-xr-x 1 root root 0 15. Nov 12:38 /dev/oprofile/3
    >
    > With linux-2.6.19-rc5, the first one (0) is missing and we get 1,2,3

    That's because 0 was never available. It is used by the NMI watchdog.
    The new kernel doesn't give it to oprofile anymore.

    > Maybe the 'bug' is in oprofile tools, that currently expect to find '0'

    Yes, it's likely a user space issue.

    -Andi

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