linux-kernel - Re: Detecting runnable process?

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Message-ID: <20101005115958.GJ5170@cr0.nay.redhat.com>
Date:	Tue, 5 Oct 2010 19:59:58 +0800
From:	Américo Wang <xiyou.wangcong@...il.com>
To:	Philip Wernersbach <philip.wernersbach@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Detecting runnable process?

On Mon, Oct 04, 2010 at 09:39:16PM -0400, Philip Wernersbach wrote:
>I'm writing some kernel code that given a task's task_struct must
>decide if it is runnable, and hasn't crashed or exited. So far here's
>what I've come up with:
>
>struct task_struct *my_task;
>... snip ...
>if(likely(my_task != NULL && pid_alive(my_task) == true)) { return my_task; }
>
>Is this correct?
>

Yes to me, you can also check the functions which call pid_alive() in kernel.
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