From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailserv2.iuinc.com (qmailr@mailserv2.iuinc.com [206.245.164.55]) by puffin.external.hp.com (8.8.7/8.8.7) with SMTP id QAA04735 for ; Thu, 16 Sep 1999 16:05:30 -0600 Received: from milano.cup.hp.com (root@milano.cup.hp.com [15.16.124.11]) by palrel3.hp.com (8.8.6 (PHNE_17135)/8.8.5tis) with ESMTP id PAA24548 for ; Thu, 16 Sep 1999 15:00:05 -0700 (PDT) Received: from localhost (grundler@localhost [127.0.0.1]) by milano.cup.hp.com with SMTP (8.8.6 (PHNE_14041)/8.7.3 TIS Messaging 5.0) id OAA21289 for ; Thu, 16 Sep 1999 14:58:14 -0700 (PDT) Message-Id: <199909162158.OAA21289@milano.cup.hp.com> To: parisc-linux@thepuffingroup.com Date: Thu, 16 Sep 1999 14:58:14 -0700 From: Grant Grundler Subject: [parisc-linux] 715/100 data page fault and msg output List-ID: Here's the output from the 715/100 followed by some comments: ... mem_init 0xC01667E0 0xC1000000 mem_map c0116000 &_stext c0010000 &_data_start c0071000 start_mem c0167000 Memory: 14948k available (388k kernel code, 984k data, 64k init) [c0000000,c1000000] here here here here here here here here here here VM test c007640c c0013288 c0076000 POSIX conformance testing by UNIFIX do_basic setup 2 do_basic setup 2 interrupted with code 15, regs c0076874 IAOQ: c0067c4c c0067c50 ISR: 00000000 IOR: c00167a8 IIR: 02a008b8 ior 00000004 sp c0076ac0 c0078000 c0078000 bad pgd 00000000 at c0078000 address 00000004 (vma) vma 00000000 bad_area bad address 00000004 PSW : 0004000b GR 1 : 00000000 GR 2 : 00014de8 GR 3 : c0079000 GR 4 : c0079000 GR 5 : c010dd48 GR 6 : c00fe000 GR 7 : c0105800 GR 8 : 00002000 GR 9 : 00000008 GR10 : c0015e84 GR11 : fc3ffe1f GR12 : 00000000 GR13 : 00000001 GR14 : 0000000a GR15 : f0000704 GR16 : f000b858 GR17 : 00000002 GR18 : 00000000 GR19 : c00eb92c GR20 : 0001aa03 GR21 : f0105800 GR22 : 00000000 GR23 : 00000060 GR24 : f0105800 GR25 : 00000001 GR26 : c00ddc8c GR27 : c0071000 GR28 : 00000000 GR29 : 00000000 GR30 : 00000000 GR31 : c0017840 SR0 : 00000000 SR1 : 00000000 SR2 : 00000000 SR3 : 00000000 SR4 : 00000000 SR5 : 00000000 SR6 : 00000000 SR7 : 00000000 IAOQ : c0067c4c c0067c50 SHR 1: 50000800 SHR 8: 00000008 SHR 9: c00d7000 SHR16: c0076874 SHR17: 00000002 SHR24: f0105800 SHR25: 00000001 Kernel panic: bad address In swapper task - not syncing ================================================ I think this is a "Data Page Fault". The processor tried to access an address which wasn't valid in the Page directory. Couple of things in the trap handler would help here: o More white space - makes what to cut/paste easier to determine o clear text describing the fault o In this case the offending instruction and a stack trace. o printing the invalid address, IOAQ and general registers was good o a message about please reset the machine to restart or something like that. On a different note, the kernel prints lots of useful stuff along with plenty of garbage. As a general rule, I would like to propose folks use file name and line number instead of "here" and "Heya". Remember we will be debugging stuff via other folks console output quite a bit. thanks, grant ps. Alex showed me the "la la la" work around in init_task.c. Is anyone already working to make this a runtime check? Grant Grundler Communications Infrastructure Computer Operations +1.408.447.7253