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From: Colin Percival <cperciva@FreeBSD.org>
Date: Fri, 19 Nov 2010 15:12:19 +0000 (UTC)
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Subject: cvs commit: src/sys/i386/xen pmap.c
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cperciva    2010-11-19 15:12:19 UTC

  FreeBSD src repository

  Modified files:
    sys/i386/xen         pmap.c 
  Log:
  SVN rev 215525 on 2010-11-19 15:12:19Z by cperciva
  
  Make pmap_release consistent with pmap_pinit with respect to unpinning
  pages.  The pinning of NPGPTD pages is #if 0ed out in pmap_pinit (I'm
  not quite sure why...) and this commit adds a corresponding #if 0 in
  pmap_release to avoid unpinning those pages.
  
  Some versions of Xen seem to silently ignore requests to unpin pages
  which were never pinned in the first place, but some return an error
  (causing FreeBSD to panic) prior to this commit.
  
  Revision  Changes    Path
  1.50      +5 -0      src/sys/i386/xen/pmap.c