linux-kernel - Re: RFC: futex_wait() can DoS the tick

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Message-ID: <1434048238.3396.59.camel@gmail.com>
Date:	Thu, 11 Jun 2015 20:43:58 +0200
From:	Mike Galbraith <umgwanakikbuti@...il.com>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...e.hu>,
	Steven Rostedt <rostedt@...dmis.org>
Subject: Re: RFC: futex_wait() can DoS the tick

On Thu, 2015-06-11 at 15:13 +0200, Thomas Gleixner wrote:

> The kernel does not care whether the actual interrupt happens or the
> timer is expired by other means.

Final question: Notabug explanation fits.. but why would the behavior
delta be so radical and repeatable w/wo deadline timer on some boxen?

	-Mike


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