linux-kernel - Re: [PATCH -rt] catch put_task_struct RCU handling up to mainline

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Message-ID: <20060726083437.GA15144@elte.hu>
Date:	Wed, 26 Jul 2006 10:34:37 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	"Paul E. McKenney" <paulmck@...ibm.com>
Cc:	oleg@...sign.ru, linux-kernel@...r.kernel.org, dino@...ibm.com,
	tytso@...ibm.com, dvhltc@...ibm.com,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH -rt] catch put_task_struct RCU handling up to mainline


* Paul E. McKenney <paulmck@...ibm.com> wrote:

> Hello!
> 
> Due to the separate -rt and mainline evolution of RCU signal handling, 
> the -rt patchset now makes each task struct go through two RCU grace 
> periods, with one call_rcu() in release_task() and with another in 
> put_task_struct().  Only the call_rcu() in release_task() is required, 
> since this is the one that is associated with tearing down the task 
> structure.
> 
> This patch removes the extra call_rcu() in put_task_struct(), synching 
> this up with mainline.  Tested lightly on i386.

i've applied your patch to the -rt tree - we'll see how it goes.

	Ingo
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