linux-kernel - [RFC/RFT PATCH v3] sched: automated per tty task groups

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Date:	Tue, 26 Oct 2010 09:07:18 +0200
From:	Mike Galbraith <efault@....de>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Ingo Molnar <mingo@...e.hu>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Markus Trippelsdorf <markus@...ppelsdorf.de>
Subject: [RFC/RFT PATCH v3] sched: automated per tty task groups

On Thu, 2010-10-21 at 18:29 +0200, Oleg Nesterov wrote:

> It is not clear to me why do we need rcu_read_lock() and how it can help.
> The tty can go away right after dereferencing signal->tty.

Which was Marcus' crash.  Didn't happen here only because I didn't have
CONFIG_PREEMPT set.

Changes since v2:
  - drop  

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