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Subject: Re: [patch] 'virtual => physical page mapping cache',
	vcache-2.5.38-B8
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Ingo Molnar <mingo@elte.hu>
Cc: Chris Wedgwood <cw@f00f.org>, Linus Torvalds <torvalds@transmeta.com>,
       Andrew Morton <akpm@zip.com.au>, Rusty Russell <rusty@rustcorp.com.au>,
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Date: 27 Sep 2002 19:01:15 +0100
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On Fri, 2002-09-27 at 18:53, Ingo Molnar wrote:
> 
> On Fri, 27 Sep 2002, Chris Wedgwood wrote:
> 
> > O_DIRECT is allow to break if someone does something silly :)  [...]
> 
> to DMA into a page that does not belong to the process anymore? I doubt
> that.

Try doing a truncate on a file as an O_DIRECT write is occuring.
Scribbling into pages you dont own is the least of your problems.


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