From owner-freebsd-ppc@freebsd.org Sat Dec 23 11:25:17 2017 Return-Path: Delivered-To: freebsd-ppc@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 482E7EA2FCB for ; Sat, 23 Dec 2017 11:25:17 +0000 (UTC) (envelope-from markmi@dsl-only.net) Received: from asp.reflexion.net (outbound-mail-210-159.reflexion.net [208.70.210.159]) (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 DD114800D1 for ; Sat, 23 Dec 2017 11:25:16 +0000 (UTC) (envelope-from markmi@dsl-only.net) Received: (qmail 22802 invoked from network); 23 Dec 2017 05:58:35 -0000 Received: from unknown (HELO rtc-sm-01.app.dca.reflexion.local) (10.81.150.1) by 0 (rfx-qmail) with SMTP; 23 Dec 2017 05:58:35 -0000 Received: by rtc-sm-01.app.dca.reflexion.local (Reflexion email security v8.40.3) with SMTP; Sat, 23 Dec 2017 00:58:35 -0500 (EST) Received: (qmail 31663 invoked from network); 23 Dec 2017 05:58:34 -0000 Received: from unknown (HELO iron2.pdx.net) (69.64.224.71) by 0 (rfx-qmail) with (AES256-SHA encrypted) SMTP; 23 Dec 2017 05:58:34 -0000 Received: from [192.168.1.25] (c-76-115-7-162.hsd1.or.comcast.net [76.115.7.162]) by iron2.pdx.net (Postfix) with ESMTPSA id 1F942EC9398; Fri, 22 Dec 2017 21:58:34 -0800 (PST) From: Mark Millard Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (Mac OS X Mail 10.3 \(3273\)) Subject: Re: TARGET_ARCH=powerpc64 jump from head -r326192 to -r327075: g_event crashes with "instruction storage interrupt" [sidestepped by avoiding use of drive labels] Date: Fri, 22 Dec 2017 21:58:33 -0800 References: <39C042C5-9800-464C-84AC-677DB45DA1C1@dsl-only.net> To: FreeBSD PowerPC ML , FreeBSD Hackers In-Reply-To: <39C042C5-9800-464C-84AC-677DB45DA1C1@dsl-only.net> Message-Id: X-Mailer: Apple Mail (2.3273) X-BeenThere: freebsd-ppc@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: Porting FreeBSD to the PowerPC List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 23 Dec 2017 11:25:17 -0000 [Avoiding referencing partitions via labels avoided the crash.] On 2017-Dec-22, at 9:26 PM, Mark Millard wrote: > [Note: I experiment with using clang as the build and > system compiler for TARGET_ARCH=powerpc64 .] > > I attempted to update a old so-called PowerMac "Quad Core" > from head -r326192 to -r328075, noting special instructions > that have been published. (This was a non-debug kernel > build.) > > Unfortunately around the: > > . . . > cd0: 66.700MB/s transfers (UDMA4, ATPI 12bytes, PIO 65534bytes) > cd0: Attempt > Trying to mount from ufs:/dev/ufs/FBSDG5Lrootfs [rw,noatime]. . . > > There ends up being a repeatable kernel trap: > (transcribed from pictures, but with notes added) > > fatal kernel trap: > (NOTE: The above can be the line before the "Trying to mount" line, > after the "cd0: Attempt" line.) > > exception = 0x400 (instruction storage interrupt) > virtual address = 0x3c4c009438427518 > srr0 = 0x3c4c009438427518 > srr1 = 0x9000000040009032 > lr = 0x14234e8 > curthread = 0x3d52a80 > pid = 13, comm = g_event > > [ thread pid 13 tid 100019 ] > Stopped at 0x3c4c009438427518 > > It reports: > > Tracing command geom pid 13 tid 100019 td 0x3d52a80 (CPU 0) > 0xC0000000032966b0: at g_new_provider_event+0x144 > 0xC0000000032966f0: at g_run_events+0x530 > 0xC000000003296830: at g_event_procbody+0x94 > 0xC000000003296860: at fork_exit+0xd8 > 0xC0000000032968f0: at fork_trampoline+0x18 > 0xC000000003296920: at blocked_loop+0x38 > > These details do not vary between attempts. > > From what I gather the code jumped to 0x3c4c009438427518 > but that is not from an executable page for the context > at the time. > > On the -r326192 powerpc system /dev/ufs/FBSDG5Lrootfs > mounts just fine. > I adjusted: /boot/loader.conf /etc/rc.conf /etc/fstab to avoid use of: geom_label_load="YES" dumpdev="/dev/label/FBSDG5Lswap" /dev/ufs/FBSDG5Lrootfs / ufs rw,noatime 1 1 /dev/label/FBSDG5Lswap none swap sw 0 0 Using instead: dumpdev="/dev/ada0s4" /dev/ada0s3 / ufs rw,noatime 1 1 /dev/ada0s4 none swap sw 0 0 This allowed the boot to work normally. === Mark Millard markmi at dsl-only.net