Date: Fri, 1 Feb 2008 15:19:32 -0800 (PST)
From: Christoph Lameter <clameter@sgi.com>
To: Robin Holt <holt@sgi.com>
cc: Andrea Arcangeli <andrea@qumranet.com>, Avi Kivity <avi@qumranet.com>,
       Izik Eidus <izike@qumranet.com>, kvm-devel@lists.sourceforge.net,
       Peter Zijlstra <a.p.zijlstra@chello.nl>, steiner@sgi.com,
       linux-kernel@vger.kernel.org, linux-mm@kvack.org,
       daniel.blueman@quadrics.com
Subject: Re: [patch 2/4] mmu_notifier: Callbacks to invalidate address ranges
In-Reply-To: <20080201220952.GA3875@sgi.com>
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References: <20080201050439.009441434@sgi.com> <20080201050623.344041545@sgi.com>
 <20080201220952.GA3875@sgi.com>
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On Fri, 1 Feb 2008, Robin Holt wrote:

> We are getting this callout when we transition the pte from a read-only
> to read-write.  Jack and I can not see a reason we would need that
> callout.  It is causing problems for xpmem in that a write fault goes
> to get_user_pages which gets back to do_wp_page that does the callout.

Right. You placed it there in the first place. So we can drop the code 
from do_wp_page?

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