usr/src/uts/common/sys/tuneable.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
  23 /*        All Rights Reserved   */
  24
  25
  26 #ifndef _SYS_TUNEABLE_H
  27 #define _SYS_TUNEABLE_H
  28
  29 #ifdef  __cplusplus
  30 extern "C" {
  31 #endif
  32
  33 typedef struct tune {
  34         int     t_gpgslo;       /* If freemem < t_getpgslow, then start */
  35                                 /* to steal pages from processes.       */
  36         int     t_pad[7];       /* Padding for driver compatibility.    */
  37         int     t_fsflushr;     /* The rate at which fsflush is run in  */
  38                                 /* seconds.                             */
  39         int     t_minarmem;     /* The minimum available resident (not  */
  40                                 /* swappable) memory to maintain in     */
  41                                 /* order to avoid deadlock.  In pages.  */
  42         int     t_minasmem;     /* The minimum available swappable      */
  43                                 /* memory to maintain in order to avoid */
  44                                 /* deadlock.  In pages.                 */
  45         int     t_flckrec;      /* max number of active frlocks */
  46 } tune_t;
  47
  48 extern tune_t   tune;
  49
  50 /*
  51  * The following is the default value for t_gpgsmsk.  It cannot be
  52  * defined in /etc/master or /stand/system due to limitations of the
  53  * config program.
  54  */
  55
  56 #define GETPGSMSK       PG_REF|PG_NDREF
  57
  58 #ifdef  __cplusplus
  59 }
  60 #endif
  61
  62 #endif  /* _SYS_TUNEABLE_H */