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Date: Mon, 20 Feb 1995 06:22:00 -0800
From: David Greenman <davidg>
Message-Id: <199502201422.GAA22760@freefall.cdrom.com>
To: CVS-commiters, cvs-sys
Subject: cvs commit: src/sys/vm vm_object.c
Sender: cvs-sys-owner@freebsd.org
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davidg      95/02/20 06:21:59

  Modified:    sys/vm   vm_object.c
  Log:
  Panic if object is deallocated too many times.
  Slight change to reverse collapsing so that vm_object_deallocate doesn't
  have to be called recursively.
  Removed half of a previous fix - the renamed page during a collapse doesn't
  need to be marked dirty because the pager backing store pointers are copied
  - thus preserving the page's data. This assumes that pages without backing
  store are always dirty (except perhaps for when they are first zeroed, but
  this doesn't matter).
  Switch order of two lines of code so that the correct pager is removed
  from the hash list. The previous code bogusly passed a NULL pointer to
  vm_object_remove(). The call to vm_object_remove() should be unnecessary
  if named anonymous objects were being dealt with correctly. They are
  currently marked as OBJ_INTERNAL, which really screws up things (such as
  this).