From owner-svn-src-head@FreeBSD.ORG  Sat May  7 12:20:55 2011
Return-Path: <owner-svn-src-head@FreeBSD.ORG>
Delivered-To: svn-src-head@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 6E4631065670;
	Sat,  7 May 2011 12:20:55 +0000 (UTC) (envelope-from jh@FreeBSD.org)
Received: from gw03.mail.saunalahti.fi (gw03.mail.saunalahti.fi
	[195.197.172.111])
	by mx1.freebsd.org (Postfix) with ESMTP id 22B948FC18;
	Sat,  7 May 2011 12:20:54 +0000 (UTC)
Received: from a91-153-123-205.elisa-laajakaista.fi
	(a91-153-123-205.elisa-laajakaista.fi [91.153.123.205])
	by gw03.mail.saunalahti.fi (Postfix) with SMTP id 1B89D216754;
	Sat,  7 May 2011 15:20:49 +0300 (EEST)
Date: Sat, 7 May 2011 15:20:48 +0300
From: Jaakko Heinonen <jh@FreeBSD.org>
To: Kostik Belousov <kostikbel@gmail.com>
Message-ID: <20110507122048.GA1846@a91-153-123-205.elisa-laajakaista.fi>
References: <201105071110.p47BAwmU096094@svn.freebsd.org>
	<20110507114856.GN48734@deviant.kiev.zoral.com.ua>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20110507114856.GN48734@deviant.kiev.zoral.com.ua>
User-Agent: Mutt/1.5.21 (2010-09-15)
Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org,
	src-committers@freebsd.org
Subject: Re: svn commit: r221597 - head/sys/kern
X-BeenThere: svn-src-head@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: SVN commit messages for the src tree for head/-current
	<svn-src-head.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-head>,
	<mailto:svn-src-head-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-head>
List-Post: <mailto:svn-src-head@freebsd.org>
List-Help: <mailto:svn-src-head-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-head>,
	<mailto:svn-src-head-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sat, 07 May 2011 12:20:55 -0000

On 2011-05-07, Kostik Belousov wrote:
> > @@ -310,6 +310,7 @@ getenv(const char *name)
> >  	int len;
> >  
> >  	if (dynamic_kenv) {
> > +		WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL, "getenv");
> >  		mtx_lock(&kenv_lock);
> >  		cp = _getenv_dynamic(name, NULL);
> >  		if (cp != NULL) {
> 
> This might be somewhat excessive. Since malloc() warns or panics anyway,
> what about moving the WITNESS_WARN into "not found" branch ?

Is this better?

%%%
Index: sys/kern/kern_environment.c
===================================================================
--- sys/kern/kern_environment.c	(revision 221597)
+++ sys/kern/kern_environment.c	(working copy)
@@ -310,7 +310,6 @@ getenv(const char *name)
 	int len;
 
 	if (dynamic_kenv) {
-		WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL, "getenv");
 		mtx_lock(&kenv_lock);
 		cp = _getenv_dynamic(name, NULL);
 		if (cp != NULL) {
@@ -322,6 +321,8 @@ getenv(const char *name)
 		} else {
 			mtx_unlock(&kenv_lock);
 			ret = NULL;
+			WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL,
+			    "getenv");
 		}
 	} else
 		ret = _getenv_static(name);
%%%

-- 
Jaakko