From owner-freebsd-hackers@freebsd.org Sat Dec 23 05:26:31 2017 Return-Path: Delivered-To: freebsd-hackers@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 B540AE99B18 for ; Sat, 23 Dec 2017 05:26:31 +0000 (UTC) (envelope-from markmi@dsl-only.net) Received: from asp.reflexion.net (outbound-mail-210-161.reflexion.net [208.70.210.161]) (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 628EF7650D for ; Sat, 23 Dec 2017 05:26:30 +0000 (UTC) (envelope-from markmi@dsl-only.net) Received: (qmail 22174 invoked from network); 23 Dec 2017 05:26:24 -0000 Received: from unknown (HELO mail-cs-02.app.dca.reflexion.local) (10.81.19.2) by 0 (rfx-qmail) with SMTP; 23 Dec 2017 05:26:24 -0000 Received: by mail-cs-02.app.dca.reflexion.local (Reflexion email security v8.40.3) with SMTP; Sat, 23 Dec 2017 00:26:24 -0500 (EST) Received: (qmail 21688 invoked from network); 23 Dec 2017 05:26:23 -0000 Received: from unknown (HELO iron2.pdx.net) (69.64.224.71) by 0 (rfx-qmail) with (AES256-SHA encrypted) SMTP; 23 Dec 2017 05:26:23 -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 29A4CEC9398; Fri, 22 Dec 2017 21:26:23 -0800 (PST) From: Mark Millard Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Mime-Version: 1.0 (Mac OS X Mail 10.3 \(3273\)) Subject: TARGET_ARCH=powerpc64 jump from head -r326192 to -r327075: g_event crashes with "instruction storage interrupt" Message-Id: <39C042C5-9800-464C-84AC-677DB45DA1C1@dsl-only.net> Date: Fri, 22 Dec 2017 21:26:22 -0800 To: FreeBSD PowerPC ML , FreeBSD Hackers X-Mailer: Apple Mail (2.3273) X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 23 Dec 2017 05:26:31 -0000 [Note: I experiment with using clang as the build and system compiler for TARGET_ARCH=3Dpowerpc64 .] 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 =3D 0x400 (instruction storage interrupt) virtual address =3D 0x3c4c009438427518 srr0 =3D 0x3c4c009438427518 srr1 =3D 0x9000000040009032 lr =3D 0x14234e8 curthread =3D 0x3d52a80 pid =3D 13, comm =3D 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. =46rom 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. =3D=3D=3D Mark Millard markmi at dsl-only.net