From owner-cvs-all  Fri Jan 21 12:17: 6 2000
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From: Matt Dillon <dillon@FreeBSD.org>
Date: Fri, 21 Jan 2000 12:17:02 -0800 (PST)
To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: cvs commit: src/sys/vm vm_map.c
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dillon      2000/01/21 12:17:02 PST

  Modified files:
    sys/vm               vm_map.c 
  Log:
      Fix a deadlock between msync(..., MS_INVALIDATE) and vm_fault.  The
      invalidation code cannot wait for paging to complete while holding a
      vnode lock, so we don't wait.  Instead we simply allow the lower level
      code to simply block on any busy pages it encounters.  I think Yahoo
      may be the only entity in the entire world that actually uses this
      msync feature :-).
  
  Bug reported by:  Paul Saab <paul@mu.org>
  
  Revision  Changes    Path
  1.185     +30 -26    src/sys/vm/vm_map.c



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