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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 <>
> 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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