From mboxrd@z Thu Jan  1 00:00:00 1970
From: Geoffrey Lefebvre <geoffrey@cs.ubc.ca>
Subject: [PATCH 0 of 2] RFC blktap: Small changes to blktap +
	added a hook to clear ptes on implicit release of VMAs.
Date: Mon, 21 May 2007 16:23:38 -0700
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Cc: Jake.Wires@xensource.com, andrew.warfield@cl.cam.ac.uk
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Hi,

These patches contain changes to the kernel blktap code. The main change is the addition of a vma hook to clear ptes when linux implicitly releases a vma. This allows the block tap to release grants when a user level process such as tapdisk crashes. This fixes the problem of Xen killing a domain because of implicit grant unmapping.

The patches should apply cleanly to changeset 15080. Comments are most welcome.

Thanks,

geoffrey