0b0dfb6b07
- replace the simplelock in struct vm_zone with a mutex. - use a proper SLIST rather than a hand-rolled job for the zone list. - add a subsystem lock that protects the zone list and the statistics counters. - merge _zalloc() into zalloc() and _zfree() into zfree(), and move them below _zget() so there's no need for a prototype. - add two initialization functions: one which initializes the subsystem mutex and the zone list, and one that currently doesn't do anything. - zap zerror(); use KASSERTs instead. - dike out half of sysctl_vm_zone(), which was mostly trying to do manually what the snprintf() call could do better. Reviewed by: jhb, jasone
61 lines
2.1 KiB
C
61 lines
2.1 KiB
C
/*
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* Copyright (c) 1997, 1998 John S. Dyson
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice immediately at the beginning of the file, without modification,
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* this list of conditions, and the following disclaimer.
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* 2. Absolutely no warranty of function or purpose is made by the author
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* John S. Dyson.
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*
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* $FreeBSD$
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*/
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#ifndef _SYS_ZONE_H
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#define _SYS_ZONE_H
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#define ZONE_INTERRUPT 1 /* Use this if you need to allocate at int time */
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#define ZONE_BOOT 16 /* This is an internal flag used by zbootinit */
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#include <sys/mutex.h>
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typedef struct vm_zone {
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struct mtx zmtx; /* lock for data structure */
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void *zitems; /* linked list of items */
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int zfreecnt; /* free entries */
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int zfreemin; /* minimum number of free entries */
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int znalloc; /* number of allocations */
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vm_offset_t zkva; /* Base kva of zone */
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int zpagecount; /* Total # of allocated pages */
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int zpagemax; /* Max address space */
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int zmax; /* Max number of entries allocated */
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int ztotal; /* Total entries allocated now */
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int zsize; /* size of each entry */
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int zalloc; /* hint for # of pages to alloc */
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int zflags; /* flags for zone */
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int zallocflag; /* flag for allocation */
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struct vm_object *zobj; /* object to hold zone */
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char *zname; /* name for diags */
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/* NOTE: zent is protected by the subsystem lock, *not* by zmtx */
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SLIST_ENTRY(vm_zone) zent; /* singly-linked list of zones */
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} *vm_zone_t;
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void vm_zone_init(void);
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void vm_zone_init2(void);
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int zinitna(vm_zone_t z, struct vm_object *obj, char *name,
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int size, int nentries, int flags, int zalloc);
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vm_zone_t zinit(char *name, int size, int nentries,
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int flags, int zalloc);
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void zbootinit(vm_zone_t z, char *name, int size,
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void *item, int nitems);
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void *zalloc(vm_zone_t z);
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void zfree(vm_zone_t z, void *item);
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#endif /* _SYS_ZONE_H */
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