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From: Arjan van de Ven <arjan@linux.intel.com>
To: mingo@redhat.com, hpa@zytor.com, dvhltc@us.ibm.com,
	linux-kernel@vger.kernel.org, rusty@rustcorp.com.au,
	arjan@linux.intel.com, peterz@infradead.org, tglx@linutronix.de,
	mingo@elte.hu
Cc: linux-tip-commits@vger.kernel.org
Subject: Re: [tip:core/futexes] futex: use current->time_slack_ns for rt tasks too
Date: Thu, 12 Mar 2009 06:53:32 -0700	[thread overview]
Message-ID: <49B913DC.6040807@linux.intel.com> (raw)
In-Reply-To: <tip-16f4993f4e9860715918efd4eeac928f8de1218b@git.kernel.org>

Darren Hart wrote:
> Commit-ID:  16f4993f4e9860715918efd4eeac928f8de1218b
> Gitweb:     http://git.kernel.org/tip/16f4993f4e9860715918efd4eeac928f8de1218b
> Author:     "Darren Hart" <dvhltc@us.ibm.com>
> AuthorDate: Thu, 12 Mar 2009 00:55:59 -0700
> Commit:     Ingo Molnar <mingo@elte.hu>
> CommitDate: Thu, 12 Mar 2009 11:20:57 +0100
> 
> futex: use current->time_slack_ns for rt tasks too
> 
> RT tasks should set their timer slack to 0 on their own.  This
> patch removes the 'if (rt_task()) slack = 0;' block in
> futex_wait.

Hi,

can you explain the rationale for this reasoning?


  reply	other threads:[~2009-03-12 13:53 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-03-12  7:55 [PATCH 0/6] Futex fixes and cleanups Darren Hart
2009-03-12  7:55 ` [PATCH 1/6] Update futex commentary Darren Hart
2009-03-12 10:24   ` [tip:core/futexes] futex: update " Darren Hart
2009-03-12  7:55 ` [PATCH 2/6] Additional (get|put)_futex_key() fixes Darren Hart
2009-03-12 10:16   ` Ingo Molnar
2009-03-12 13:42     ` Thomas Gleixner
2009-03-12 23:22       ` Darren Hart
2009-03-12 10:24   ` [tip:core/futexes] futex: additional " Darren Hart
2009-03-13  0:20     ` Ingo Molnar
2009-03-13  5:46       ` Darren Hart
2009-03-13  0:24   ` [tip:core/urgent] " Darren Hart
2009-03-12  7:55 ` [PATCH 3/6] futex: add double_unlock_hb() Darren Hart
2009-03-12 10:07   ` Peter Zijlstra
2009-03-12 10:10     ` Ingo Molnar
2009-03-12 10:58       ` Thomas Gleixner
2009-03-12 15:13         ` Darren Hart
2009-03-12 10:24   ` [tip:core/futexes] " Darren Hart
2009-03-12  7:55 ` [PATCH 4/6] futex: Use current->time_slack_ns for rt tasks too Darren Hart
2009-03-12 10:11   ` Peter Zijlstra
2009-03-12 10:24   ` [tip:core/futexes] futex: use " Darren Hart
2009-03-12 13:53     ` Arjan van de Ven [this message]
2009-03-12 14:02       ` Peter Zijlstra
2009-03-12 14:25         ` Thomas Gleixner
2009-03-12 14:48           ` Peter Zijlstra
2009-03-12 15:01             ` Arjan van de Ven
2009-03-12 21:33               ` Darren Hart
2009-03-12 21:43                 ` Thomas Gleixner
2009-03-12 21:29         ` Darren Hart
2009-03-12  7:56 ` [PATCH 5/6] futex: unlock before returning -EFAULT Darren Hart
2009-03-12 10:13   ` Peter Zijlstra
2009-03-12 10:47     ` Thomas Gleixner
2009-03-12 11:06       ` Peter Zijlstra
2009-03-12 15:15         ` Darren Hart
2009-03-12 22:17     ` Darren Hart
2009-03-12 10:24   ` [tip:core/futexes] " Darren Hart
2009-03-13  0:24   ` [tip:core/urgent] " Darren Hart
2009-03-12  7:56 ` [PATCH 6/6] futex: cleanup fault logic Darren Hart
2009-03-12 10:15   ` Peter Zijlstra
2009-03-12 15:09     ` Darren Hart
2009-03-12 10:25   ` [tip:core/futexes] futex: clean up " Darren Hart
2009-03-12 12:22 ` [PATCH 0/6] Futex fixes and cleanups Ingo Molnar
2009-03-12 15:21   ` Darren Hart

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