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    SubjectRe: [PATCH] Prevent users from disabling tickless
    On Wed, Dec 22, 2010 at 12:46:23AM +0100, Rafael J. Wysocki wrote:
    > On Wednesday, December 22, 2010, Matthew Wilcox wrote:
    > >
    > > Disabling NO_HZ has a serious negative effect on performance -- an extra
    > > 70us per I/O. Prevent users from deselecting it.
    > >
    > > Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
    >
    > OTOH, it causes some systems to not work at all still. Sadly.

    It doesn't stop people from specifying nohz=off on the kernel command line.

    --
    Matthew Wilcox Intel Open Source Technology Centre
    "Bill, look, we understand that you're interested in selling us this
    operating system, but compare it to ours. We can't possibly take such
    a retrograde step."


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