linux-kernel - [PATCH RT 0/5] preempt_disable/enable -> migrate

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Message-ID: <20140210153653.GA20017@opentech.at>
Date:	Mon, 10 Feb 2014 16:36:53 +0100
From:	Nicholas Mc Guire <der.herr@...r.at>
To:	linux-rt-users@...r.kernel.org
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	Steven Rostedt <rostedt@...dmis.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Carsten Emde <C.Emde@...dl.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andreas Platschek <platschek@....tuwien.ac.at>
Subject: [PATCH RT 0/5] preempt_disable/enable -> migrate_disable/enable
	pushdown proposals

a small series of preempt_disable/enable -> migrate_disable/enable pushdown 
proposals

In mainline a number of preempt_disable/enable are actually topology control 
and not actual concurrency control - these cases can be pushed down to a 
preemptible migrate_disable/enable. 

This little series contains a few pushdowns from preempt_disable to 
migrate_disable where code pattern scans using cocci scripts suggested this 
to be possible. The cases detected were then reviewed and tested with the 
migrate_disable/enable respectively with the preempt_disable/enable 
completely removed in one case.

Testing was done but is of very limited use for locking/migration related
issues, so a review of the code analysis/rational is requested along with
additional testing.

thx!
hofrat
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