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Add brief comments to the sysctlnode members that describe what they

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are.

Cut SYSCTL_DEFSIZE in half, which results in roughly a 40% improvement
in memory usage by sysctlnodes (on my laptop), along with a dozen
extra calls to sysctl_realloc() during kernel bootstrap (which no one
should notice anyway).
This commit is contained in:
atatat 2004-01-07 21:17:01 +00:00
parent 1ea1aebf5b
commit 0f4c4fc955
1 changed files with 16 additions and 16 deletions
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32
sys/sys/sysctl.h
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@ -1,4 +1,4 @@
/* $NetBSD: sysctl.h,v 1.105 2004/01/03 23:29:42 tron Exp $ */
/* $NetBSD: sysctl.h,v 1.106 2004/01/07 21:17:01 atatat Exp $ */
/*
* Copyright (c) 1989, 1993
@ -60,7 +60,7 @@
#define SYSCTL_NAMELEN 32 /* longest name allowed for a node */
#define CREATE_BASE (1024) /* start of dynamic mib allocation */
#define SYSCTL_DEFSIZE 16 /* initial size of a child set */
#define SYSCTL_DEFSIZE 8 /* initial size of a child set */
/*
* Each subsystem defined by sysctl defines a list of variables
@ -940,24 +940,24 @@ __END_DECLS
#endif /* !_KERNEL */
struct sysctlnode {
uint sysctl_flags;
int sysctl_num;
size_t sysctl_size;
char sysctl_name[SYSCTL_NAMELEN];
uint sysctl_flags; /* flags and type */
int sysctl_num; /* mib number */
size_t sysctl_size; /* size of instrumented data */
char sysctl_name[SYSCTL_NAMELEN]; /* node name */
union {
struct {
uint scn_csize;
uint scn_clen;
struct sysctlnode *scn_child;
uint scn_csize; /* size of child node array */
uint scn_clen; /* number of valid children */
struct sysctlnode *scn_child; /* array of child nodes */
} scu_node;
int scu_alias;
int scu_idata;
u_quad_t scu_qdata;
void *scu_data;
int scu_alias; /* node this node refers to */
int scu_idata; /* immediate "int" data */
u_quad_t scu_qdata; /* immediate "u_quad_t" data */
void *scu_data; /* pointer to external data */
} sysctl_un;
sysctlfn sysctl_func;
struct sysctlnode *sysctl_parent;
uint sysctl_ver;
sysctlfn sysctl_func; /* access helper function */
struct sysctlnode *sysctl_parent; /* parent of this node */
uint sysctl_ver; /* node's version vs. rest of tree */
};
#define sysctl_csize sysctl_un.scu_node.scn_csize