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Add a sysctl that records the amount of physical memory in the machine.

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Submitted by:	Nicko Dehaine <nicko@stbernard.com>
MFC after:	1 day
This commit is contained in:
Wes Peters 2005-02-28 21:42:56 +00:00
parent 528433ba71
commit a09150446d
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=142834
4 changed files with 15 additions and 1 deletions
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2
sys/i386/i386/machdep.c
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@ -182,6 +182,7 @@ static void freebsd4_sendsig(sig_t catcher, int sig, sigset_t *mask,
#endif
long Maxmem = 0;
long realmem = 0;
vm_paddr_t phys_avail[10];
@ -214,6 +215,7 @@ cpu_startup(dummy)
#endif
printf("real memory = %ju (%ju MB)\n", ptoa((uintmax_t)Maxmem),
ptoa((uintmax_t)Maxmem) / 1048576);
realmem = Maxmem;
/*
* Display any holes after the first chunk of extended memory.
*/

9
sys/kern/kern_mib.c
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@ -167,6 +167,15 @@ SYSCTL_PROC(_hw, HW_PHYSMEM, physmem, CTLTYPE_ULONG | CTLFLAG_RD,
0, 0, sysctl_hw_physmem, "LU", "");
static int
sysctl_hw_realmem(SYSCTL_HANDLER_ARGS)
{
u_long val;
val = ctob(realmem);
return (sysctl_handle_long(oidp, &val, 0, req));
}
SYSCTL_PROC(_hw, HW_REALMEM, realmem, CTLTYPE_ULONG | CTLFLAG_RD,
0, 0, sysctl_hw_realmem, "LU", "");
static int
sysctl_hw_usermem(SYSCTL_HANDLER_ARGS)
{
u_long val;

4
sys/sys/sysctl.h
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@ -458,7 +458,8 @@ TAILQ_HEAD(sysctl_ctx_list, sysctl_ctx_entry);
#define HW_DISKSTATS 9 /* struct: diskstats[] */
#define HW_FLOATINGPT 10 /* int: has HW floating point? */
#define HW_MACHINE_ARCH 11 /* string: machine architecture */
#define HW_MAXID 12 /* number of valid hw ids */
#define HW_REALMEM 12 /* int: 'real' memory */
#define HW_MAXID 13 /* number of valid hw ids */
#define CTL_HW_NAMES { \
{ 0, 0 }, \
@ -472,6 +473,7 @@ TAILQ_HEAD(sysctl_ctx_list, sysctl_ctx_entry);
{ "disknames", CTLTYPE_STRUCT }, \
{ "diskstats", CTLTYPE_STRUCT }, \
{ "floatingpoint", CTLTYPE_INT }, \
{ "realmem", CTLTYPE_ULONG }, \
}
/*

1
sys/sys/systm.h
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@ -61,6 +61,7 @@ extern struct mtx sellock; /* select lock variable */
extern struct cv selwait; /* select conditional variable */
extern long physmem; /* physical memory */
extern long realmem; /* 'real' memory */
extern char *rootdevnames[2]; /* names of possible root devices */