Current Path : /sys/vm/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
Current File : //sys/vm/swap_pager.h |
/*- * Copyright (c) 1990 University of Utah. * Copyright (c) 1991 The Regents of the University of California. * All rights reserved. * * This code is derived from software contributed to Berkeley by * the Systems Programming Group of the University of Utah Computer * Science Department. * * 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. * 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. * * from: @(#)swap_pager.h 7.1 (Berkeley) 12/5/90 * $FreeBSD: release/9.1.0/sys/vm/swap_pager.h 224582 2011-08-01 19:12:15Z kib $ */ #ifndef _VM_SWAP_PAGER_H_ #define _VM_SWAP_PAGER_H_ 1 typedef int32_t swblk_t; /* * swap offset. This is the type used to * address the "virtual swap device" and * therefore the maximum swap space is * 2^32 pages. */ struct buf; struct swdevt; typedef void sw_strategy_t(struct buf *, struct swdevt *); typedef void sw_close_t(struct thread *, struct swdevt *); /* * Swap device table */ struct swdevt { int sw_flags; int sw_nblks; int sw_used; dev_t sw_dev; struct vnode *sw_vp; void *sw_id; swblk_t sw_first; swblk_t sw_end; struct blist *sw_blist; TAILQ_ENTRY(swdevt) sw_list; sw_strategy_t *sw_strategy; sw_close_t *sw_close; }; #define SW_CLOSING 0x04 #ifdef _KERNEL extern int swap_pager_full; extern int swap_pager_avail; struct xswdev; int swap_dev_info(int name, struct xswdev *xs, char *devname, size_t len); void swap_pager_copy(vm_object_t, vm_object_t, vm_pindex_t, int); void swap_pager_freespace(vm_object_t, vm_pindex_t, vm_size_t); void swap_pager_swap_init(void); int swap_pager_isswapped(vm_object_t, struct swdevt *); int swap_pager_reserve(vm_object_t, vm_pindex_t, vm_size_t); void swap_pager_status(int *total, int *used); void swapoff_all(void); #endif /* _KERNEL */ #endif /* _VM_SWAP_PAGER_H_ */