linux-kernel - Re: [RFC][PATCH] Add prctl to set sibling thread names

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Message-ID: <20091021174804.3885db37@infradead.org>
Date:	Wed, 21 Oct 2009 17:48:04 -0700
From:	Arjan van de Ven <arjan@...radead.org>
To:	john stultz <johnstul@...ibm.com>
Cc:	Andi Kleen <andi@...stfloor.org>,
	lkml <linux-kernel@...r.kernel.org>,
	Mike Fulton <fultonm@...ibm.com>,
	Sean Foley <Sean_Foley@...ibm.com>,
	Darren Hart <dvhltc@...ibm.com>
Subject: Re: [RFC][PATCH] Add prctl to set sibling thread names

On Wed, 21 Oct 2009 16:21:37 -0700
john stultz <johnstul@...ibm.com> wrote:

> 
> Taking a very raw attempt at this, I scratched out the following
> simple implementation. I'd appreciate any review or suggestions for
> improvements. I'm not at all certain the passing of the thread pid_t
> through the unsigned long is valid, for instance, or if
> same_thread_group() is the right check to make sure we only change
> siblings and not tid from other processes. So any advice on better
> approaches would be great.
> 
> +				return -EINVAL;
> +
> +			set_task_comm(tsk, comm);


you're pretty much the first now who touches ->comm from
not-the-thread-itself.... are you sure that is safe?


-- 
Arjan van de Ven 	Intel Open Source Technology Centre
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