a401ebbe32
require specific partitions be mentioned in the kernel config
file ("swap on foo" is now obsolete).
From Poul-Henning:
The visible effect is this:
As default, unless
options "NSWAPDEV=23"
is in your config, you will have four swap-devices.
You can swapon(2) any block device you feel like, it doesn't have
to be in the kernel config.
There is a performance/resource win available by getting the NSWAPDEV right
(but only if you have just one swap-device ??), but using that as default
would be too restrictive.
The invisible effect is that:
Swap-handling disappears from the $arch part of the kernel.
It gets a lot simpler (-145 lines) and cleaner.
Reviewed by: John Dyson, David Greenman
Submitted by: Poul-Henning Kamp, with minor changes by me.
134 lines
5.4 KiB
C
134 lines
5.4 KiB
C
/*-
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)vm_extern.h 8.2 (Berkeley) 1/12/94
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* $Id: vm_extern.h,v 1.14 1995/05/10 18:56:04 davidg Exp $
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*/
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#ifndef _VM_EXTERN_H_
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#define _VM_EXTERN_H_
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struct buf;
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struct loadavg;
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struct proc;
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struct vmspace;
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struct vmtotal;
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struct mount;
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struct vnode;
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#ifdef KGDB
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void chgkprot __P((caddr_t, int, int));
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#endif
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/*
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* Try to get semi-meaningful wait messages into thread_sleep...
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*/
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void thread_sleep_ __P((int, simple_lock_t, char *));
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#if __GNUC__ >= 2
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#define thread_sleep(a,b,c) thread_sleep_((a), (b), __FUNCTION__)
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#else
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#define thread_sleep(a,b,c) thread_sleep_((a), (b), "vmslp")
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#endif
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#ifdef KERNEL
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extern int indent;
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#ifdef TYPEDEF_FOR_UAP
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int getpagesize __P((struct proc * p, void *, int *));
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int madvise __P((struct proc *, void *, int *));
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int mincore __P((struct proc *, void *, int *));
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int mprotect __P((struct proc *, void *, int *));
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int msync __P((struct proc *, void *, int *));
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int munmap __P((struct proc *, void *, int *));
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int obreak __P((struct proc *, void *, int *));
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int sbrk __P((struct proc *, void *, int *));
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int smmap __P((struct proc *, void *, int *));
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int sstk __P((struct proc *, void *, int *));
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int swapon __P((struct proc *, void *, int *));
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#endif
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void assert_wait __P((int, boolean_t));
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void faultin __P((struct proc *p));
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int grow __P((struct proc *, u_int));
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void iprintf __P((const char *,...));
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int kernacc __P((caddr_t, int, int));
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int kinfo_loadavg __P((int, char *, int *, int, int *));
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int kinfo_meter __P((int, caddr_t, int *, int, int *));
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vm_offset_t kmem_alloc __P((vm_map_t, vm_size_t));
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vm_offset_t kmem_alloc_pageable __P((vm_map_t, vm_size_t));
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vm_offset_t kmem_alloc_wait __P((vm_map_t, vm_size_t));
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void kmem_free __P((vm_map_t, vm_offset_t, vm_size_t));
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void kmem_free_wakeup __P((vm_map_t, vm_offset_t, vm_size_t));
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void kmem_init __P((vm_offset_t, vm_offset_t));
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vm_offset_t kmem_malloc __P((vm_map_t, vm_size_t, boolean_t));
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vm_map_t kmem_suballoc __P((vm_map_t, vm_offset_t *, vm_offset_t *, vm_size_t, boolean_t));
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void loadav __P((struct loadavg *));
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void munmapfd __P((struct proc *, int));
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int pager_cache __P((vm_object_t, boolean_t));
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void sched __P((void));
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int swaponvp __P((struct proc *, struct vnode *, dev_t , u_long ));
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void swapout __P((struct proc *));
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void swapout_threads __P((void));
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void swstrategy __P((struct buf *));
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void thread_block __P((char *));
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void thread_sleep __P((int, simple_lock_t, boolean_t));
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void thread_wakeup __P((int));
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int useracc __P((caddr_t, int, int));
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int vm_fault __P((vm_map_t, vm_offset_t, vm_prot_t, boolean_t));
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void vm_fault_copy_entry __P((vm_map_t, vm_map_t, vm_map_entry_t, vm_map_entry_t));
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void vm_fault_unwire __P((vm_map_t, vm_offset_t, vm_offset_t));
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int vm_fault_wire __P((vm_map_t, vm_offset_t, vm_offset_t));
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int vm_fork __P((struct proc *, struct proc *, int));
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void vm_init_limits __P((struct proc *));
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void vm_mem_init __P((void));
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int vm_mmap __P((vm_map_t, vm_offset_t *, vm_size_t, vm_prot_t, vm_prot_t, int, caddr_t, vm_offset_t));
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vm_offset_t vm_page_alloc_contig __P((vm_offset_t, vm_offset_t, vm_offset_t, vm_offset_t));
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void vm_set_page_size __P((void));
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void vmmeter __P((void));
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struct vmspace *vmspace_alloc __P((vm_offset_t, vm_offset_t, int));
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struct vmspace *vmspace_fork __P((struct vmspace *));
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void vmspace_free __P((struct vmspace *));
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void vmtotal __P((struct vmtotal *));
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vm_pager_t vnode_pager_alloc __P((void *, vm_offset_t, vm_prot_t, vm_offset_t));
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void vnode_pager_setsize __P((struct vnode *, u_long));
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void vnode_pager_umount __P((struct mount *));
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boolean_t vnode_pager_uncache __P((struct vnode *));
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void vslock __P((caddr_t, u_int));
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void vsunlock __P((caddr_t, u_int, int));
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#endif /* KERNEL */
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#endif /* !_VM_EXTERN_H_ */
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