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Subject: Re: [RFC] mlock/stack guard interaction fixup
From: Peter Zijlstra <peterz@infradead.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Ian Jackson <ijackson@chiark.greenend.org.uk>, Greg KH <gregkh@suse.de>,
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On Mon, 2010-08-23 at 10:34 -0700, Linus Torvalds wrote:
> It's also
> dubious as a way to pin particular pages in the page tables, because
> it's not necessarily something that the semantics guarantee
> (historically mlock just guarantees that they won't be swapped out,
> not that they will necessarily maintain some particular mapping). 

Quite so, and esp. now that page migration gets used more with all that
memory compaction stuff that got merged.
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