From owner-svn-src-all@FreeBSD.ORG Thu Nov 21 18:37:11 2013 Return-Path: Delivered-To: svn-src-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 8D171202; Thu, 21 Nov 2013 18:37:11 +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)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 7CA1C2B07; Thu, 21 Nov 2013 18:37:11 +0000 (UTC) Received: from svn.freebsd.org ([127.0.1.70]) by svn.freebsd.org (8.14.7/8.14.7) with ESMTP id rALIbB6F006194; Thu, 21 Nov 2013 18:37:11 GMT (envelope-from emaste@svn.freebsd.org) Received: (from emaste@localhost) by svn.freebsd.org (8.14.7/8.14.5/Submit) id rALIbBdU006191; Thu, 21 Nov 2013 18:37:11 GMT (envelope-from emaste@svn.freebsd.org) Message-Id: <201311211837.rALIbBdU006191@svn.freebsd.org> From: Ed Maste Date: Thu, 21 Nov 2013 18:37:11 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r258431 - head/sys/amd64/amd64 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: 2.1.16 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: Thu, 21 Nov 2013 18:37:11 -0000 Author: emaste Date: Thu Nov 21 18:37:11 2013 New Revision: 258431 URL: http://svnweb.freebsd.org/changeset/base/258431 Log: Disable amd64 boot time memory test by default The page presence memory test takes a long time on large memory systems and has little value on contemporary amd64 hardware. Sponsored by: The FreeBSD Foundation Modified: head/sys/amd64/amd64/machdep.c Modified: head/sys/amd64/amd64/machdep.c ============================================================================== --- head/sys/amd64/amd64/machdep.c Thu Nov 21 17:49:56 2013 (r258430) +++ head/sys/amd64/amd64/machdep.c Thu Nov 21 18:37:11 2013 (r258431) @@ -1476,13 +1476,15 @@ getmemsize(caddr_t kmdp, u_int64_t first Maxmem = atop(physmem_tunable); /* - * By default enable the memory test on real hardware, and disable - * it if we appear to be running in a VM. This avoids touching all - * pages unnecessarily, which doesn't matter on real hardware but is - * bad for shared VM hosts. Use a general name so that - * one could eventually do more with the code than just disable it. + * The boot memory test is disabled by default, as it takes a + * significant amount of time on large-memory systems, and is + * unfriendly to virtual machines as it unnecessarily touches all + * pages. + * + * A general name is used as the code may be extended to support + * additional tests beyond the current "page present" test. */ - memtest = (vm_guest > VM_GUEST_NO) ? 0 : 1; + memtest = 0; TUNABLE_ULONG_FETCH("hw.memtest.tests", &memtest); /*