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 (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #ifndef _SYS_MEM_CAGE_H 27 #define _SYS_MEM_CAGE_H 28 29 #pragma ident "%Z%%M% %I% %E% SMI" 30 31 #include <sys/types.h> 32 #include <sys/memlist.h> 33 34 /* 35 * Memory caging interfaces. 36 */ 37 38 #ifdef __cplusplus 39 extern "C" { 40 #endif 41 42 #ifdef _KERNEL 43 44 #define KCT_FAILURE 0 45 #define KCT_CRIT 1 46 #define KCT_NONCRIT 2 47 48 extern int kernel_cage_enable; 49 extern int kcage_on; 50 extern kthread_id_t kcage_cageout_thread; 51 extern pgcnt_t kcage_freemem; 52 extern pgcnt_t kcage_needfree; 53 extern pgcnt_t kcage_lotsfree; 54 extern pgcnt_t kcage_desfree; 55 extern pgcnt_t kcage_minfree; 56 extern pgcnt_t kcage_throttlefree; 57 58 extern void kcage_freemem_add(pgcnt_t); 59 extern void kcage_freemem_sub(pgcnt_t); 60 extern int kcage_create_throttle(pgcnt_t, int); 61 62 /* 63 * Control direction of growth: 0: increasing pfns, 1: decreasing. 64 */ 65 typedef enum {KCAGE_UP, KCAGE_DOWN} kcage_dir_t; 66 extern void kcage_range_init(struct memlist *, kcage_dir_t, pgcnt_t); 67 extern int kcage_range_add(pfn_t, pgcnt_t, kcage_dir_t); 68 69 extern int kcage_current_pfn(pfn_t *); 70 extern int kcage_range_delete(pfn_t, pgcnt_t); 71 extern int kcage_range_delete_post_mem_del(pfn_t, pgcnt_t); 72 73 extern void kcage_recalc_thresholds(void); 74 75 /* Called from vm_pageout.c */ 76 extern void kcage_cageout_init(void); 77 extern void kcage_cageout_wakeup(void); 78 79 /* Called from clock thread in clock.c */ 80 extern void kcage_tick(void); 81 82 /* Called from vm_pagelist.c */ 83 extern int kcage_next_range(int incage, 84 pfn_t lo, pfn_t hi, pfn_t *nlo, pfn_t *nhi); 85 86 extern kcage_dir_t kcage_startup_dir; 87 88 #endif /* _KERNEL */ 89 90 #ifdef __cplusplus 91 } 92 #endif 93 94 #endif /* _SYS_MEM_CAGE_H */ 95