The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/uvm/uvm_pdpolicy.h

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    1 /*      $NetBSD: uvm_pdpolicy.h,v 1.9 2022/08/20 23:26:02 riastradh 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 #include <sys/mutex.h>
   33 #include <sys/stdint.h>
   34 
   35 #include <uvm/uvm_page.h>
   36 
   37 struct krwlock;
   38 struct uvm_cpu;
   39 struct vm_anon;
   40 struct vm_page;
   41 
   42 /*
   43  * these API is for uvm internal use only.
   44  * don't use them directly from outside of /sys/uvm.
   45  */
   46 
   47 void uvmpdpol_idle(struct uvm_cpu *);
   48 void uvmpdpol_init(void);
   49 void uvmpdpol_init_cpu(struct uvm_cpu *);
   50 void uvmpdpol_reinit(void);
   51 void uvmpdpol_estimatepageable(int *, int *);
   52 bool uvmpdpol_needsscan_p(void);
   53 
   54 void uvmpdpol_pageactivate(struct vm_page *);
   55 void uvmpdpol_pagedeactivate(struct vm_page *);
   56 void uvmpdpol_pagedequeue(struct vm_page *);
   57 void uvmpdpol_pageenqueue(struct vm_page *);
   58 bool uvmpdpol_pageactivate_p(struct vm_page *);
   59 bool uvmpdpol_pageisqueued_p(struct vm_page *);
   60 void uvmpdpol_pagerealize(struct vm_page *);
   61 void uvmpdpol_anfree(struct vm_anon *);
   62 
   63 void uvmpdpol_tune(void);
   64 void uvmpdpol_scaninit(void);
   65 void uvmpdpol_scanfini(void);
   66 struct vm_page *uvmpdpol_selectvictim(struct krwlock **);
   67 void uvmpdpol_balancequeue(int);
   68 
   69 void uvmpdpol_sysctlsetup(void);
   70 
   71 /*
   72  * uvmpdpol_set_intent: set an intended state for the page, taking care not
   73  * to overwrite any of the other flags.
   74  */
   75 
   76 static inline void
   77 uvmpdpol_set_intent(struct vm_page *pg, uint32_t i)
   78 {
   79 
   80         KASSERT(mutex_owned(&pg->interlock));
   81         pg->pqflags = PQ_INTENT_SET | (pg->pqflags & ~PQ_INTENT_MASK) | i;
   82 }
   83 
   84 #endif /* !_UVM_PDPOLICY_H_ */

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