From owner-cvs-all  Wed Mar 10 21:57:27 1999
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From: Alan Cox <alc@FreeBSD.org>
Date: Wed, 10 Mar 1999 21:56:51 -0800 (PST)
To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: cvs commit: src/sys/vm vm_map.c vm_map.h
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alc         1999/03/10 21:56:51 PST

  Modified files:        (Branch: RELENG_3)
    sys/vm               vm_map.c vm_map.h 
  Log:
  MFC:
  
  Change vm_map_growstack to acquire and hold a read lock (instead of a write
  lock) until it actually needs to modify the vm_map.
  
  Upgrading a map's lock to exclusive status should increment
  the map's timestamp.  In general, whenever an exclusive lock is
  acquired the timestamp should be incremented.
  
  Revision  Changes    Path
  1.139.2.5 +17 -11    src/sys/vm/vm_map.c
  1.33.2.2  +6 -2      src/sys/vm/vm_map.h


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