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    SubjectRe: [PATCH] scheduler: fix x86 regression in native_sched_clock

    * Andrew Morton <akpm@linux-foundation.org> wrote:

    > > > A bit risky - it's quite an expansion of code which no longer can
    > > > call printk.
    > > >
    > > > You might want to take that WARN_ON out of __update_rq_clock() ;)
    > >
    > > hm, dont we already detect printk recursions and turn them into a
    > > silent return instead of a hang/crash?
    >
    > We'll pop the locks and will proceed to do the nested printk. So
    > __update_rq_clock() will need rather a lot of stack ;)

    yeah. That behavior of printk is rather fragile. I think my previous
    patch should handle all such incidents.

    Ingo


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