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Diffstat (limited to 'sys/vm/vm_pageout.h')
| -rw-r--r-- | sys/vm/vm_pageout.h | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/sys/vm/vm_pageout.h b/sys/vm/vm_pageout.h new file mode 100644 index 0000000..834aee5 --- /dev/null +++ b/sys/vm/vm_pageout.h @@ -0,0 +1,112 @@ +/* + * Copyright (c) 1991, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * The Mach Operating System project at Carnegie-Mellon University. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)vm_pageout.h 8.2 (Berkeley) 1/12/94 + * + * + * Copyright (c) 1987, 1990 Carnegie-Mellon University. + * All rights reserved. + * + * Author: Avadis Tevanian, Jr. + * + * Permission to use, copy, modify and distribute this software and + * its documentation is hereby granted, provided that both the copyright + * notice and this permission notice appear in all copies of the + * software, derivative works or modified versions, and any portions + * thereof, and that both notices appear in supporting documentation. + * + * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" + * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND + * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. + * + * Carnegie Mellon requests users of this software to return to + * + * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU + * School of Computer Science + * Carnegie Mellon University + * Pittsburgh PA 15213-3890 + * + * any improvements or extensions that they make and grant Carnegie the + * rights to redistribute these changes. + */ + +/* + * Header file for pageout daemon. + */ + +/* + * Exported data structures. + */ + +extern int vm_pages_needed; /* should be some "event" structure */ +simple_lock_data_t vm_pages_needed_lock; +extern int vm_pageout_pages_needed; + +#define VM_PAGEOUT_ASYNC 0 +#define VM_PAGEOUT_SYNC 1 +#define VM_PAGEOUT_FORCE 2 + +/* + * Exported routines. + */ + +/* + * Signal pageout-daemon and wait for it. + */ + +#define VM_WAIT vm_wait() + +inline static void vm_wait() { + extern struct proc *curproc, *pageproc; + int s; + s = splhigh(); + if (curproc == pageproc) { + vm_pageout_pages_needed = 1; + tsleep((caddr_t) &vm_pageout_pages_needed, PSWP, "vmwait", 0); + vm_pageout_pages_needed = 0; + } else { + wakeup((caddr_t) &vm_pages_needed); + tsleep((caddr_t) &cnt.v_free_count, PVM, "vmwait", 0); + } + splx(s); +} + + +#ifdef KERNEL +void vm_pageout __P((void)); +int vm_pageout_scan __P((void)); +void vm_pageout_page __P((vm_page_t, vm_object_t)); +void vm_pageout_cluster __P((vm_page_t, vm_object_t)); +#endif |
