On Mar 17, 2012, at 5:04 PM, Alan Cox wrote:
Author: alc
Date: Sat Mar 17 22:04:58 2012
New Revision: 233097
URL: http://svn.freebsd.org/changeset/base/233097
Log:
With the changes over the past year to how accesses to the page's
dirty
field are synchronized, there is no need for pmap_protect() to
acquire
the page queues lock unless it is going to access the pv lists.
Reviewed by: kib
Under what circumstances does the page queue lock actually have to be
held? It looks like from this that I can remove the page queue lock
from the PPC/AIM pmap_protect() completely, but I don't have a good
sense of it.
-Nathan
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