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To: Frank Cornelis <Frank.Cornelis@rug.ac.be>
Cc: linux-kernel@vger.kernel.org
Subject: Re: task_struct.mm == NULL
In-Reply-To: <Pine.GSO.4.31.0111281300070.8642-100000@eduserv.rug.ac.be.suse.lists.linux.kernel>
From: Andi Kleen <ak@suse.de>
Date: 28 Nov 2001 13:23:20 +0100
In-Reply-To: Frank Cornelis's message of "28 Nov 2001 13:09:45 +0100"
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Frank Cornelis <Frank.Cornelis@rug.ac.be> writes:

> Hey,
> 
> I found in some code checks for task_struct.mm being NULL.
> When can task_struct.mm of a process be NULL except right before the
> process-kill?

For kernel threads that run in lazy-mm mode. It allows a much cheaper context
switch into kernel threads.

-Andi
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