[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Tue, 21 Dec 2010 17:24:07 -0700
From: Matthew Wilcox <matthew@....cx>
To: "Rafael J. Wysocki" <rjw@...k.pl>
Cc: Thomas Gleixner <tglx@...utronix.de>,
Arjan van de Ven <arjan@...radead.org>,
linux-kernel@...r.kernel.org
Subject: Re: [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@...ux.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."
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists