From owner-svn-src-head@freebsd.org Sat Feb 18 20:49:33 2017 Return-Path: Delivered-To: svn-src-head@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id E2767CE31C2 for ; Sat, 18 Feb 2017 20:49:33 +0000 (UTC) (envelope-from markmi@dsl-only.net) Received: from asp.reflexion.net (outbound-mail-210-75.reflexion.net [208.70.210.75]) (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 91B85C92 for ; Sat, 18 Feb 2017 20:49:32 +0000 (UTC) (envelope-from markmi@dsl-only.net) Received: (qmail 26631 invoked from network); 18 Feb 2017 20:49:31 -0000 Received: from unknown (HELO mail-cs-01.app.dca.reflexion.local) (10.81.19.1) by 0 (rfx-qmail) with SMTP; 18 Feb 2017 20:49:31 -0000 Received: by mail-cs-01.app.dca.reflexion.local (Reflexion email security v8.30.0) with SMTP; Sat, 18 Feb 2017 15:49:31 -0500 (EST) Received: (qmail 11745 invoked from network); 18 Feb 2017 20:49:31 -0000 Received: from unknown (HELO iron2.pdx.net) (69.64.224.71) by 0 (rfx-qmail) with (AES256-SHA encrypted) SMTP; 18 Feb 2017 20:49:31 -0000 Received: from [192.168.1.111] (c-67-170-167-181.hsd1.or.comcast.net [67.170.167.181]) by iron2.pdx.net (Postfix) with ESMTPSA id 59599EC807D; Sat, 18 Feb 2017 12:49:30 -0800 (PST) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 10.2 \(3259\)) Subject: Re: svn commit: r313268 - head/sys/kern [through -r313271 for atomic_fcmpset use and later: fails on PowerMac G5 "Quad Core"; -r313266 works] From: Mark Millard In-Reply-To: <2FD12B8F-2255-470A-98D4-2DCE9C7495F5@dsl-only.net> Date: Sat, 18 Feb 2017 12:49:29 -0800 Cc: svn-src-head@freebsd.org, FreeBSD PowerPC ML , FreeBSD Current Content-Transfer-Encoding: 7bit Message-Id: References: <2FD12B8F-2255-470A-98D4-2DCE9C7495F5@dsl-only.net> To: mjg@freebsd.org, Justin Hibbits X-Mailer: Apple Mail (2.3259) X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 18 Feb 2017 20:49:34 -0000 On 2017-Feb-18, at 4:18 AM, Mark Millard wrote: > [Note: I experiment with clang based powerpc64 builds, > reporting problems that I find. Justin is familiar > with this, as is Nathan.] > > I tried to update the PowerMac G5 (a so-called "Quad Core") > that I have access to from head -r312761 to -r313864 and > ended up with random panics and hang ups in fairly short > order after booting. > > Some approximate bisecting for the kernel lead to: > (sometimes getting part way into a buildkernel attempt > for a different version before a failure happens) > > -r313266: works (just before use of atomic_fcmpset) > vs. > -r313271: fails (last of the "use atomic_fcmpset" check-ins) > > (I did not try -r313268 through -r313270 as the use was > gradually added.) > > So I'm currently running a -r313864 world with a -r313266 > kernel. > > No kernel that I tried that was from before -r313266 had the > problems. > > Any kernel that I tried that was from after -r313271 had the > problems. > > Of course I did not try them all in other direction. :) [Of course: "either direction".] I'll note that the -r313864 buildworld was without MALLOC_PRODUCTION being defined. (Unusual for me but I'm testing if a jemalloc assert problem on arm64 also happens on powerpc64.) By contrast the buildkernels were production style (as is normal for me unless I'm trying to track something down that I think might be exposed by the extra checks). === Mark Millard markmi at dsl-only.net