Re: Magic sys-rq key - how ?

From: Alan Curry (pacman-kernel@cqc.com)
Date: Thu Apr 20 2000 - 15:56:04 EDT

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    Paul Barton-Davis writes the following:
    >
    >what else do I need apart from
    >
    > CONFIG_MAGIC_SYSRQ=y
    >
    >to get the magic sysrq key to work ? none of the last 4 kernels that
    >I've built have had a working sysrq key, and its getting to be a
    >problem.

    The answer is /proc/sys/kernel/sysrq and it's been given already, but I have
    a followup question: why? In early 2.2 you could say Y to sysrq in config,
    and you had sysrq. Then someone added an extra hurdle in /proc. So now we
    have this mechanism by which you can get the kernel to do a few things even
    when userspace is hosed, but it's only good if you can
    echo 1 >/proc/sys/kernel/sysrq first. What good is that?

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