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uvm_pdpolicy.h revision 1.8 
      1 /*	$NetBSD: uvm_pdpolicy.h,v 1.8 2020/05/17 19:38:17 ad Exp $	*/
      2 
      3 /*-
      4  * Copyright (c)2005, 2006 YAMAMOTO Takashi,
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #ifndef _UVM_PDPOLICY_H_
     30 #define _UVM_PDPOLICY_H_
     31 
     32 struct vm_page;
     33 struct vm_anon;
     34 
     35 /*
     36  * these API is for uvm internal use only.
     37  * don't use them directly from outside of /sys/uvm.
     38  */
     39 
     40 void uvmpdpol_idle(struct uvm_cpu *);
     41 void uvmpdpol_init(void);
     42 void uvmpdpol_init_cpu(struct uvm_cpu *);
     43 void uvmpdpol_reinit(void);
     44 void uvmpdpol_estimatepageable(int *, int *);
     45 bool uvmpdpol_needsscan_p(void);
     46 
     47 void uvmpdpol_pageactivate(struct vm_page *);
     48 void uvmpdpol_pagedeactivate(struct vm_page *);
     49 void uvmpdpol_pagedequeue(struct vm_page *);
     50 void uvmpdpol_pageenqueue(struct vm_page *);
     51 bool uvmpdpol_pageactivate_p(struct vm_page *);
     52 bool uvmpdpol_pageisqueued_p(struct vm_page *);
     53 void uvmpdpol_pagerealize(struct vm_page *);
     54 void uvmpdpol_anfree(struct vm_anon *);
     55 
     56 void uvmpdpol_tune(void);
     57 void uvmpdpol_scaninit(void);
     58 void uvmpdpol_scanfini(void);
     59 struct vm_page *uvmpdpol_selectvictim(krwlock_t **lock);
     60 void uvmpdpol_balancequeue(int);
     61 
     62 void uvmpdpol_sysctlsetup(void);
     63 
     64 /*
     65  * uvmpdpol_set_intent: set an intended state for the page, taking care not
     66  * to overwrite any of the other flags.
     67  */
     68 
     69 static inline void
     70 uvmpdpol_set_intent(struct vm_page *pg, uint32_t i)
     71 {
     72 
     73 	KASSERT(mutex_owned(&pg->interlock));
     74 	pg->pqflags = PQ_INTENT_SET | (pg->pqflags & ~PQ_INTENT_MASK) | i;
     75 }
     76 
     77 #endif /* !_UVM_PDPOLICY_H_ */
     78