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SubjectRe: top stack (l)users for 2.5.69
    [ misinformation snipped ]

OK, my real last word on the subject.

When the kernel is running on behalf of a user process, there is more
context than just the struct task_struct part of current. There is a
kernel stack, which must be per process since each process can have
its own call chain of kernel functions.

By all means, see switch_to(). Look at what it does to ESP.

- Roland
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