Messages in this thread | | | Date | Tue, 21 Dec 2010 17:24:07 -0700 | From | Matthew Wilcox <> | Subject | Re: [PATCH] Prevent users from disabling tickless |
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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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