From owner-freebsd-arch  Mon Jan 15 12:17:14 2001
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Date: Mon, 15 Jan 2001 12:16:56 -0800
From: Alfred Perlstein <bright@wintelcom.net>
To: Hajimu UMEMOTO <ume@FreeBSD.ORG>
Cc: arch@FreeBSD.ORG
Subject: Re: dynamic vs static sysctls?
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* Hajimu UMEMOTO <ume@FreeBSD.ORG> [010115 11:47] wrote:
> >>>>> On Mon, 15 Jan 2001 11:14:39 -0800
> >>>>> Alfred Perlstein <bright@wintelcom.net> said:
> 
> bright> Just do this:
> 
> bright> static unsigned int nforks = 0;
> bright> SYSCTL_UINT(_kern, OID_AUTO, nforks, CTLFLAG_RD, &nforks, 0,
> bright> 	"number of fork()s since boot");
> 
> bright> document the sysctl. :)
> 
> Okey.  Thanks.
> 
> bright> Oh, you mean in a kernel module?  I think you need to use
> bright> kernel_sysctl() (from kern/kern_sysctl.c), I'm not sure if it's
> bright> documented anywhere, if not it'd be nice to have a sysctl(9) manpage.
> bright> :)
> 
> No.  I just want to distinguish the version from userland.

I think sysctl probably returns something like ENOENT if getsysctlbyname
fails.  If not it should.

> > Do you mean ALLPROC_LOCK(AP_EXCLUSIVE) / ALLPROC_LOCK(AP_RELEASE) ?
> > If so, I'll move nforks++ between them.
> 
> bright> No, don't do that, we'll figure out how to lock it later, you may
> bright> want to use the mp_fixme (mpfixme?) macro near the sysctl variable
> bright> though.
> 
> Okey, I see.

-- 
-Alfred Perlstein - [bright@wintelcom.net|alfred@freebsd.org]
"I have the heart of a child; I keep it in a jar on my desk."


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