Subject: Re: [PATCH 0/1] Fixup write permission of TLB on powerpc e500 core

From: Benjamin Herrenschmidt <[email-masked]>
Date: Fri, 15 Jul 2011 19:05:23 +1000

On Fri, 2011-07-15 at 10:20 +0200, Peter Zijlstra wrote:
> But but but but, that get_user_pages(.write=1, .force=0) should result
> in a COW break, getting our own writable page.
> 
> What is this e500 thing smoking that this doesn't work? 

Right. That should have triggered the cow & flushed the TLB entry.... 

Cheers,
Ben.