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    SubjectRe: [RFC PATCH 0/5] x86: check stack overflows more reliably
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    On Mon, Nov 7, 2011 at 7:51 AM, Mitsuo Hayasaka
    <mitsuo.hayasaka.hu@hitachi.com> wrote:
    > (2) check stack overflow in detail
    >    Currently, only kernel stack is checked for the overflow,
    >    which is not sufficient for enterprise systems. To enhance
    >    reliability, expand stack overflow checking to IRQ and
    >    exception stacks optionally. This is disabled by default
    >    in Kconfig.

    This sounds useful. What's the reason for not enabling this by
    default? Performance regressions?

    Pekka
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