mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-22 11:17:19 +00:00
a3870a1826
now it uses a very dumb first-touch allocation policy. This will change in the future. - Each architecture indicates the maximum number of supported memory domains via a new VM_NDOMAIN parameter in <machine/vmparam.h>. - Each cpu now has a PCPU_GET(domain) member to indicate the memory domain a CPU belongs to. Domain values are dense and numbered from 0. - When a platform supports multiple domains, the default freelist (VM_FREELIST_DEFAULT) is split up into N freelists, one for each domain. The MD code is required to populate an array of mem_affinity structures. Each entry in the array defines a range of memory (start and end) and a domain for the range. Multiple entries may be present for a single domain. The list is terminated by an entry where all fields are zero. This array of structures is used to split up phys_avail[] regions that fall in VM_FREELIST_DEFAULT into per-domain freelists. - Each memory domain has a separate lookup-array of freelists that is used when fulfulling a physical memory allocation. Right now the per-domain freelists are listed in a round-robin order for each domain. In the future a table such as the ACPI SLIT table may be used to order the per-domain lookup lists based on the penalty for each memory domain relative to a specific domain. The lookup lists may be examined via a new vm.phys.lookup_lists sysctl. - The first-touch policy is implemented by using PCPU_GET(domain) to pick a lookup list when allocating memory. Reviewed by: alc
67 lines
2.5 KiB
C
67 lines
2.5 KiB
C
/*-
|
|
* Copyright (c) 2002-2006 Rice University
|
|
* Copyright (c) 2007 Alan L. Cox <alc@cs.rice.edu>
|
|
* All rights reserved.
|
|
*
|
|
* This software was developed for the FreeBSD Project by Alan L. Cox,
|
|
* Olivier Crameri, Peter Druschel, Sitaram Iyer, and Juan Navarro.
|
|
*
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT
|
|
* HOLDERS 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
/*
|
|
* Physical memory system definitions
|
|
*/
|
|
|
|
#ifndef _VM_PHYS_H_
|
|
#define _VM_PHYS_H_
|
|
|
|
#ifdef _KERNEL
|
|
|
|
/* Domains must be dense (non-sparse) and zero-based. */
|
|
struct mem_affinity {
|
|
vm_paddr_t start;
|
|
vm_paddr_t end;
|
|
int domain;
|
|
};
|
|
|
|
extern struct mem_affinity *mem_affinity;
|
|
|
|
void vm_phys_add_page(vm_paddr_t pa);
|
|
vm_page_t vm_phys_alloc_contig(unsigned long npages,
|
|
vm_paddr_t low, vm_paddr_t high,
|
|
unsigned long alignment, unsigned long boundary);
|
|
vm_page_t vm_phys_alloc_freelist_pages(int flind, int pool, int order);
|
|
vm_page_t vm_phys_alloc_pages(int pool, int order);
|
|
vm_paddr_t vm_phys_bootstrap_alloc(vm_size_t size, unsigned long alignment);
|
|
void vm_phys_free_pages(vm_page_t m, int order);
|
|
void vm_phys_init(void);
|
|
void vm_phys_set_pool(int pool, vm_page_t m, int order);
|
|
boolean_t vm_phys_unfree_page(vm_page_t m);
|
|
boolean_t vm_phys_zero_pages_idle(void);
|
|
|
|
#endif /* _KERNEL */
|
|
#endif /* !_VM_PHYS_H_ */
|