Favorite UNIX

Arthur Krewat krewat at kilonet.net
Sun Oct 1 13:43:28 AEST 2017


On 9/30/2017 9:10 PM, Larry McVoy wrote:
>
> I think 4.1.4 had Greg Limes herculean effort to make the VM system
> scale on multiprocessors.  So it might be worth a look.
>
>
This? From 4.1.4:

/*      @(#)vm_mp.c     1.1     94/10/31        */

/*
  * Copyright (c) 1986 by Sun Microsystems, Inc.
  */

/*
  * VM - multiprocessor/ing support.
  *
  * Currently the kmon_enter() / kmon_exit() pair implements a
  * simple monitor for objects protected by the appropriate lock.
  * The kcv_wait() / kcv_broadcast pait implements a simple
  * condition variable which can be used for `sleeping'
  * and `waking' inside a monitor if some resource is
  * is needed which is not available.
  *
  * XXX - this code is written knowing about the semantics
  * of sleep/wakeup and UNIX scheduling on a uniprocessor machine.
  */




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