From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtpde02.sap-ag.de (smtpde02.sap-ag.de [194.39.131.53]) by dsl2.external.hp.com (Postfix) with ESMTP id 2069B482B for ; Fri, 28 Dec 2001 03:23:40 -0700 (MST) Content-Type: text/plain; charset="iso-8859-1" From: Helge Deller To: James Bottomley Date: Fri, 28 Dec 2001 11:23:37 +0100 Cc: parisc-linux@parisc-linux.org References: <200112272023.fBRKN4g21408@localhost.localdomain> In-Reply-To: <200112272023.fBRKN4g21408@localhost.localdomain> MIME-Version: 1.0 Message-Id: Subject: [parisc-linux] Re: rmmod lasi700 hangs the machine Sender: parisc-linux-admin@lists.parisc-linux.org Errors-To: parisc-linux-admin@lists.parisc-linux.org List-Help: List-Post: List-Subscribe: , List-Id: parisc-linux developers list List-Unsubscribe: , List-Archive: Hi James, After adding the disable_irq(host->irq); to the lasi700 driver the kernel no longer crashes, but the rmmod command now hangs and doesn't return. The good thing is, that I now could log in on anther terminal and get some (hopefully) useful info for you: All info below are taken after the "rmmod lasi700" command: hw1306:d036493> lsmod Module Size Used by lasi700 1908 0 (deleted) 53c700 28396 0 [lasi700] d036493@hw1306:/ > pstree -ap init,1) |-atd,312) |-(keventd,2) |-(kjournald,7) |-.......... |-(scsi_eh_1,402) <- is this normal ?? |-sshd,298) | |-sshd,367) | | `-csh,368) | | `-bash,391) | | `-rmmod,404) lasi700 hw1306:~# strace rmmod lasi700 execve("/sbin/rmmod", ["rmmod", "lasi700"], [/* 14 vars */]) = 0 newuname({sys="Linux", node="hw1306", ...}) = 0 brk(0) = 0x45000 open("/etc/ld.so.preload", O_RDONLY) = -1 ENOENT (No such file or directory) open("/etc/ld.so.cache", O_RDONLY) = 3 fstat64(3, {st_mode=0, st_size=0, ...}) = 0 mmap(NULL, 34267, PROT_READ, MAP_PRIVATE, 3, 0) = 0x40019000 close(3) = 0 open("/lib/libc.so.6", O_RDONLY) = 3 read(3, "\177ELF\1\2\1\3\0\0\0\0\0\0\0\0\0\3\0\17\0\0\0\1\0\2?@"..., 1024) = 1024 fstat64(3, {st_mode=0, st_size=0, ...}) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x40022000 mmap(NULL, 1404268, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0x4002a000 mprotect(0x40164000, 118124, PROT_NONE) = 0 mmap(0x40173000, 45056, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 0x139000) = 0x40173000 mmap(0x4017e000, 11628, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x4017e000 close(3) = 0 munmap(0x40019000, 34267) = 0 query_module(NULL, 0, NULL, 0) = 0 brk(0) = 0x45000 brk(0x45120) = 0x45120 brk(0x46000) = 0x46000 query_module(NULL, QM_MODULES, { /* 6 entries */ }, 6) = 0 query_module("lasi700", QM_INFO, {address=0x870000, size=1908, flags=MOD_RUNNING, usecount=0}, 16) = 0 query_module("lasi700", QM_SYMBOLS, { /* 5 entries */ }, 5) = 0 query_module("53c700", QM_INFO, {address=0x868000, size=28396, flags=MOD_RUNNING|MOD_USED_ONCE, usecount=0}, 16) = 0 query_module("53c700", QM_SYMBOLS, { /* 7 entries */ }, 7) = 0 query_module("nfsd", QM_INFO, {address=0x854000, size=75216, flags=MOD_RUNNING|MOD_AUTOCLEAN|MOD_VISITED|MOD_USED_ONCE, usecount=8}, 16) = 0 query_module("nfsd", QM_SYMBOLS, { /* 4 entries */ }, 4) = 0 query_module("lockd", QM_INFO, {address=0x846000, size=51400, flags=MOD_RUNNING|MOD_AUTOCLEAN|MOD_VISITED|MOD_USED_ONCE, usecount=1}, 16) = 0 brk(0x47000) = 0x47000 query_module("lockd", QM_SYMBOLS, { /* 9 entries */ }, 9) = 0 query_module("sunrpc", QM_INFO, {address=0x834000, size=66284, flags=MOD_RUNNING|MOD_AUTOCLEAN|MOD_VISITED|MOD_USED_ONCE, usecount=1}, 16) = 0 query_module("sunrpc", QM_SYMBOLS, 0x46270, 1024, 1719) = -1 ENOSPC (No space left on device) query_module("sunrpc", QM_SYMBOLS, { /* 68 entries */ }, 68) = 0 query_module("autofs", QM_INFO, {address=0x830000, size=11508, flags=MOD_RUNNING|MOD_AUTOCLEAN|MOD_VISITED|MOD_USED_ONCE, usecount=2}, 16) = 0 query_module("autofs", QM_SYMBOLS, { /* 22 entries */ }, 22) = 0 brk(0x4c000) = 0x4c000 query_module(NULL, QM_SYMBOLS, 0x46d40, 16384, 22587) = -1 ENOSPC (No space left on device) brk(0x52000) = 0x52000 query_module(NULL, QM_SYMBOLS, { /* 984 entries */ }, 984) = 0 delete_module("lasi700" Sadly I don't have a gdb here... Helge On Thursday 27 December 2001 21:23, James Bottomley wrote: > As Grant says, its hard to debug this type of thing. However, I do have a > theory: The free_irq() call in parisc doesn't do an irq shutdown (which > disables the irq). This looks like an omission, since I thought the > behaviours of the arch irq.c's were all converging. It is possible that an > unhandled interrupt would cause the type of problem you describe > > A simple test of the theory is to try the attached patch and see if that > fixes the problem. If that doesn't work, I'll try to reproduce (although > this will take a while since I'll have to construct an NFS boot > environment). > > James