linux-kernel - Re: [PATCH v8 08/14] nohz_full: allow disabling the 1Hz minimum tick at boot

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Message-ID: <alpine.DEB.2.20.1510210925070.5864@east.gentwo.org>
Date:	Wed, 21 Oct 2015 09:28:04 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	Frederic Weisbecker <fweisbec@...il.com>
cc:	Chris Metcalf <cmetcalf@...hip.com>,
	Gilad Ben Yossef <giladb@...hip.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Rik van Riel <riel@...hat.com>, Tejun Heo <tj@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Viresh Kumar <viresh.kumar@...aro.org>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>,
	Andy Lutomirski <luto@...capital.net>,
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v8 08/14] nohz_full: allow disabling the 1Hz minimum tick
 at boot

On Tue, 20 Oct 2015, Frederic Weisbecker wrote:

> There have been proposals to disable/tune the 1 Hz tick via debugfs which
> I Nacked because once you give such an opportunity to the users, they
> will use that hack and never fix the real underlying issue.

Well this is a pretty bad argument. By that reasoning no one should be
allowed to use root. After all stupid users will become root and kill
processes that are hung. And the underlying issue that causes those hangs
in processes will never be fixed because they will keep on killing
processes.


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