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Date: Mon, 09 Sep 2002 23:02:16 +0200
From: Manfred Spraul <manfred@colorfullife.com>
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To: "Imran Badr" <imran.badr@cavium.com>, linux-kernel@vger.kernel.org
Subject: RE: Calculating kernel logical address ..
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>>As long as you can be sure they won't spontaneously vanish on you.
> 
>>--
>>Daniel
>>-
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> 
> 
> 
> down(&current->mm->mmap_sem) would help.
> 

Wrong. Acquiring the mmap semaphore does NOT prevent the swapper from 
swapping out pages.

Only the page_table_lock prevents the swapper from touching a task.

--
	Manfred

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