linux-kernel - Re: [PATCH 4/4] posix-timers: turn it_signal into it

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Message-ID: <1315340860.3400.30.camel@edumazet-laptop>
Date:	Tue, 06 Sep 2011 22:27:40 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	Oleg Nesterov <oleg@...hat.com>, Andi Kleen <ak@...ux.intel.com>,
	Andi Kleen <andi@...stfloor.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 4/4] posix-timers: turn it_signal into it_valid flag

Le mardi 06 septembre 2011 à 22:10 +0200, Thomas Gleixner a écrit :

> Vs. the refcounting, that should be solvable by a rcu_barrier() before
> 
> +   idr_destroy(&sig->posix_timers_id);
> 
> in exit_itimers().

Well, rcu_barrier() is too slow, please Andi dont try this :)



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