From owner-svn-src-all@FreeBSD.ORG Wed Sep 24 12:39:13 2014 Return-Path: Delivered-To: svn-src-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 6DB8876E; Wed, 24 Sep 2014 12:39:13 +0000 (UTC) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:1900:2254:2068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 593603E8; Wed, 24 Sep 2014 12:39:13 +0000 (UTC) Received: from svn.freebsd.org ([127.0.1.70]) by svn.freebsd.org (8.14.9/8.14.9) with ESMTP id s8OCdDWp058742; Wed, 24 Sep 2014 12:39:13 GMT (envelope-from kib@FreeBSD.org) Received: (from kib@localhost) by svn.freebsd.org (8.14.9/8.14.9/Submit) id s8OCdDSq058741; Wed, 24 Sep 2014 12:39:13 GMT (envelope-from kib@FreeBSD.org) Message-Id: <201409241239.s8OCdDSq058741@svn.freebsd.org> X-Authentication-Warning: svn.freebsd.org: kib set sender to kib@FreeBSD.org using -f From: Konstantin Belousov Date: Wed, 24 Sep 2014 12:39:13 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r272069 - head/lib/libthr/thread X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 24 Sep 2014 12:39:13 -0000 Author: kib Date: Wed Sep 24 12:39:12 2014 New Revision: 272069 URL: http://svnweb.freebsd.org/changeset/base/272069 Log: Switch the defaults to not split the RLIMIT_STACK-sized initial thread stack into the stacks of the created threads. Add knob LIBPTHREAD_SPLITSTACK_MAIN to restore the older behaviour. Sponsored by: The FreeBSD Foundation MFC after: 3 weeks Modified: head/lib/libthr/thread/thr_init.c Modified: head/lib/libthr/thread/thr_init.c ============================================================================== --- head/lib/libthr/thread/thr_init.c Wed Sep 24 12:19:00 2014 (r272068) +++ head/lib/libthr/thread/thr_init.c Wed Sep 24 12:39:12 2014 (r272069) @@ -445,7 +445,7 @@ init_private(void) struct rlimit rlim; size_t len; int mib[2]; - char *env; + char *env, *env_bigstack, *env_splitstack; _thr_umutex_init(&_mutex_static_lock); _thr_umutex_init(&_cond_static_lock); @@ -473,8 +473,9 @@ init_private(void) len = sizeof (_usrstack); if (sysctl(mib, 2, &_usrstack, &len, NULL, 0) == -1) PANIC("Cannot get kern.usrstack from sysctl"); - env = getenv("LIBPTHREAD_BIGSTACK_MAIN"); - if (env != NULL) { + env_bigstack = getenv("LIBPTHREAD_BIGSTACK_MAIN"); + env_splitstack = getenv("LIBPTHREAD_SPLITSTACK_MAIN"); + if (env_bigstack != NULL || env_splitstack == NULL) { if (getrlimit(RLIMIT_STACK, &rlim) == -1) PANIC("Cannot get stack rlimit"); _thr_stack_initial = rlim.rlim_cur;