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freebsd/sys/vm/vm_reserv.h
Alan Cox 44aab2c3de Introduce vm_reserv_reclaim_contig(). This function is used by
contigmalloc(9) as a last resort to steal pages from an inactive,
partially-used superpage reservation.

Rename vm_reserv_reclaim() to vm_reserv_reclaim_inactive() and
refactor it so that a separate subroutine is responsible for breaking
the selected reservation.  This subroutine is also used by
vm_reserv_reclaim_contig().
2008-04-06 18:09:28 +00:00

63 lines
2.5 KiB
C

/*-
* Copyright (c) 2002-2006 Rice University
* Copyright (c) 2007-2008 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.
*
* $FreeBSD$
*/
/*
* Superpage reservation management definitions
*/
#ifndef _VM_RESERV_H_
#define _VM_RESERV_H_
#ifdef _KERNEL
#if VM_NRESERVLEVEL > 0
vm_page_t vm_reserv_alloc_page(vm_object_t object, vm_pindex_t pindex);
void vm_reserv_break_all(vm_object_t object);
boolean_t vm_reserv_free_page(vm_page_t m);
void vm_reserv_init(void);
int vm_reserv_level_iffullpop(vm_page_t m);
boolean_t vm_reserv_reactivate_page(vm_page_t m);
boolean_t vm_reserv_reclaim_contig(vm_paddr_t size, vm_paddr_t low,
vm_paddr_t high, unsigned long alignment,
unsigned long boundary);
boolean_t vm_reserv_reclaim_inactive(void);
void vm_reserv_rename(vm_page_t m, vm_object_t new_object,
vm_object_t old_object, vm_pindex_t old_object_offset);
vm_paddr_t vm_reserv_startup(vm_offset_t *vaddr, vm_paddr_t end,
vm_paddr_t high_water);
#endif /* VM_NRESERVLEVEL > 0 */
#endif /* _KERNEL */
#endif /* !_VM_RESERV_H_ */