0d94caffca
much higher filesystem I/O performance, and much better paging performance. It represents the culmination of over 6 months of R&D. The majority of the merged VM/cache work is by John Dyson. The following highlights the most significant changes. Additionally, there are (mostly minor) changes to the various filesystem modules (nfs, msdosfs, etc) to support the new VM/buffer scheme. vfs_bio.c: Significant rewrite of most of vfs_bio to support the merged VM buffer cache scheme. The scheme is almost fully compatible with the old filesystem interface. Significant improvement in the number of opportunities for write clustering. vfs_cluster.c, vfs_subr.c Upgrade and performance enhancements in vfs layer code to support merged VM/buffer cache. Fixup of vfs_cluster to eliminate the bogus pagemove stuff. vm_object.c: Yet more improvements in the collapse code. Elimination of some windows that can cause list corruption. vm_pageout.c: Fixed it, it really works better now. Somehow in 2.0, some "enhancements" broke the code. This code has been reworked from the ground-up. vm_fault.c, vm_page.c, pmap.c, vm_object.c Support for small-block filesystems with merged VM/buffer cache scheme. pmap.c vm_map.c Dynamic kernel VM size, now we dont have to pre-allocate excessive numbers of kernel PTs. vm_glue.c Much simpler and more effective swapping code. No more gratuitous swapping. proc.h Fixed the problem that the p_lock flag was not being cleared on a fork. swap_pager.c, vnode_pager.c Removal of old vfs_bio cruft to support the past pseudo-coherency. Now the code doesn't need it anymore. machdep.c Changes to better support the parameter values for the merged VM/buffer cache scheme. machdep.c, kern_exec.c, vm_glue.c Implemented a seperate submap for temporary exec string space and another one to contain process upages. This eliminates all map fragmentation problems that previously existed. ffs_inode.c, ufs_inode.c, ufs_readwrite.c Changes for merged VM/buffer cache. Add "bypass" support for sneaking in on busy buffers. Submitted by: John Dyson and David Greenman
140 lines
5.9 KiB
C
140 lines
5.9 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 1.7 1994/12/30 08:02:16 bde 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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#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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#endif
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void assert_wait __P((int, boolean_t));
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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 svm_allocate __P((struct proc *, void *, int *));
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int svm_deallocate __P((struct proc *, void *, int *));
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int svm_inherit __P((struct proc *, void *, int *));
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int svm_protect __P((struct proc *, void *, int *));
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void swapinit __P((void));
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int swapon __P((struct proc *, void *, int *));
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void swapout __P((struct proc *));
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void swapout_threads __P((void));
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int swfree __P((struct proc *, int));
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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_allocate __P((vm_map_t, vm_offset_t *, vm_size_t, boolean_t));
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int vm_allocate_with_pager __P((vm_map_t, vm_offset_t *, vm_size_t, boolean_t, vm_pager_t, vm_offset_t, boolean_t));
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int vm_deallocate __P((vm_map_t, vm_offset_t, vm_size_t));
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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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int vm_inherit __P((vm_map_t, vm_offset_t, vm_size_t, vm_inherit_t));
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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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int vm_protect __P((vm_map_t, vm_offset_t, vm_size_t, boolean_t, vm_prot_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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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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