c33e3a642b
per-cpu alloc and free of pages. The cache is filled with as few trips to the phys allocator as possible by the use of a new vm_phys_alloc_npages() function which allocates as many as N pages. This code was originally by markj with the import function rewritten by me. Reviewed by: markj, kib Tested by: pho Sponsored by: Netflix, Dell/EMC Isilon Differential Revision: https://reviews.freebsd.org/D14905
122 lines
3.9 KiB
C
122 lines
3.9 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2002-2006 Rice University
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* Copyright (c) 2007 Alan L. Cox <alc@cs.rice.edu>
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* All rights reserved.
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*
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* This software was developed for the FreeBSD Project by Alan L. Cox,
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* Olivier Crameri, Peter Druschel, Sitaram Iyer, and Juan Navarro.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
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* WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* Physical memory system definitions
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*/
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#ifndef _VM_PHYS_H_
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#define _VM_PHYS_H_
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#ifdef _KERNEL
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/* Domains must be dense (non-sparse) and zero-based. */
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struct mem_affinity {
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vm_paddr_t start;
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vm_paddr_t end;
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int domain;
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};
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#ifdef NUMA
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extern struct mem_affinity *mem_affinity;
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extern int *mem_locality;
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#endif
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struct vm_freelist {
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struct pglist pl;
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int lcnt;
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};
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struct vm_phys_seg {
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vm_paddr_t start;
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vm_paddr_t end;
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vm_page_t first_page;
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int domain;
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struct vm_freelist (*free_queues)[VM_NFREEPOOL][VM_NFREEORDER];
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};
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extern struct vm_phys_seg vm_phys_segs[];
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extern int vm_phys_nsegs;
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/*
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* The following functions are only to be used by the virtual memory system.
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*/
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void vm_phys_add_seg(vm_paddr_t start, vm_paddr_t end);
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vm_page_t vm_phys_alloc_contig(int domain, u_long npages, vm_paddr_t low,
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vm_paddr_t high, u_long alignment, vm_paddr_t boundary);
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vm_page_t vm_phys_alloc_freelist_pages(int domain, int freelist, int pool,
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int order);
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vm_page_t vm_phys_alloc_pages(int domain, int pool, int order);
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int vm_phys_alloc_npages(int domain, int pool, vm_page_t *m, int cnt);
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int vm_phys_domain_match(int prefer, vm_paddr_t low, vm_paddr_t high);
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int vm_phys_fictitious_reg_range(vm_paddr_t start, vm_paddr_t end,
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vm_memattr_t memattr);
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void vm_phys_fictitious_unreg_range(vm_paddr_t start, vm_paddr_t end);
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vm_page_t vm_phys_fictitious_to_vm_page(vm_paddr_t pa);
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void vm_phys_free_contig(vm_page_t m, u_long npages);
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void vm_phys_free_pages(vm_page_t m, int order);
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void vm_phys_init(void);
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vm_page_t vm_phys_paddr_to_vm_page(vm_paddr_t pa);
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vm_page_t vm_phys_scan_contig(int domain, u_long npages, vm_paddr_t low,
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vm_paddr_t high, u_long alignment, vm_paddr_t boundary, int options);
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void vm_phys_set_pool(int pool, vm_page_t m, int order);
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boolean_t vm_phys_unfree_page(vm_page_t m);
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int vm_phys_mem_affinity(int f, int t);
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/*
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*
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* vm_phys_domain:
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*
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* Return the index of the domain the page belongs to.
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*/
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static inline int
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vm_phys_domain(vm_page_t m)
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{
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#ifdef NUMA
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int domn, segind;
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/* XXXKIB try to assert that the page is managed */
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segind = m->segind;
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KASSERT(segind < vm_phys_nsegs, ("segind %d m %p", segind, m));
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domn = vm_phys_segs[segind].domain;
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KASSERT(domn < vm_ndomains, ("domain %d m %p", domn, m));
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return (domn);
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#else
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return (0);
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#endif
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}
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#endif /* _KERNEL */
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#endif /* !_VM_PHYS_H_ */
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