shrinker.h

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    1 /*-
    2  * Copyright (c) 2020 Emmanuel Vadot <manu@FreeBSD.org>
    3  *
    4  * Redistribution and use in source and binary forms, with or without
    5  * modification, are permitted provided that the following conditions
    6  * are met:
    7  * 1. Redistributions of source code must retain the above copyright
    8  *    notice, this list of conditions and the following disclaimer.
    9  * 2. Redistributions in binary form must reproduce the above copyright
   10  *    notice, this list of conditions and the following disclaimer in the
   11  *    documentation and/or other materials provided with the distribution.
   12  *
   13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   16  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   17  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   18  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   19  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   20  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   21  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   22  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   23  * SUCH DAMAGE.
   24  *
   25  * $FreeBSD$
   26  */
   27 
   28 #ifndef _LINUXKPI_LINUX_SHRINKER_H_
   29 #define _LINUXKPI_LINUX_SHRINKER_H_
   30 
   31 #include <sys/queue.h>
   32 #include <linux/gfp.h>
   33 
   34 struct shrink_control {
   35         gfp_t           gfp_mask;
   36         unsigned long   nr_to_scan;
   37         unsigned long   nr_scanned;
   38 };
   39 
   40 struct shrinker {
   41         unsigned long           (*count_objects)(struct shrinker *, struct shrink_control *);
   42         unsigned long           (*scan_objects)(struct shrinker *, struct shrink_control *);
   43         int                     seeks;
   44         long                    batch;
   45         TAILQ_ENTRY(shrinker)   next;
   46 };
   47 
   48 #define SHRINK_STOP     (~0UL)
   49 
   50 #define DEFAULT_SEEKS   2
   51 
   52 int     linuxkpi_register_shrinker(struct shrinker *s);
   53 void    linuxkpi_unregister_shrinker(struct shrinker *s);
   54 
   55 #define register_shrinker(s)    linuxkpi_register_shrinker(s)
   56 #define unregister_shrinker(s)  linuxkpi_unregister_shrinker(s)
   57 
   58 #endif  /* _LINUXKPI_LINUX_SHRINKER_H_ */

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FreeBSD/Linux Kernel Cross Reference sys/compat/linuxkpi/common/include/linux/shrinker.h

FreeBSD/Linux Kernel Cross Reference
sys/compat/linuxkpi/common/include/linux/shrinker.h