1 message in org.freebsd.freebsd-smallRe: error 6: panic : cannot mount roo...| From | Sent On | Attachments |
|---|---|---|
| John Birrell | May 20, 1999 2:32 pm |
| Subject: | Re: error 6: panic : cannot mount root(2) with PicoBSD current | |
|---|---|---|
| From: | John Birrell (jb...@cimlogic.com.au) | |
| Date: | May 20, 1999 2:32:40 pm | |
| List: | org.freebsd.freebsd-small | |
Roger Hardiman wrote:
Help
I'm trying to get the PicoBSD code on -current compiling again as it has got a bit stale. But I get a kernel Panic.
I brought the kernel config files up to date. Booting with the 'dial' disk (build without ssh) panics with
error 6: panic: cannot mount root (2)
This comes just ater the sio and ie0 probes.
I wonder if it has anything to do with the old entry config kernel root on wd0
which the new config program ignores.
In a kernel with only mfs, MFS_ROOT means _no_ rootdev.
This breakage was caused by phk when he changed src/sys/kern/vfs_conf.c for his "jail" implementation. The problem is that with MFS_ROOT, the cpu_rootconf() function in src/i386/i386/autoconf.c correctly chooses mfs, but doesn't set the global rootdev variable that phk's code requires. I've reported this problem to current (got no response) and to phk (with a patch which he responded to with "what am I missing?").
Here is the patch I sent (cut'n'pasted from my copy of the email. so tabs are smashed).
NB: I have an axe too. Mine is an Oz version though, so if I turn it over, it works like a hammer. I'll use it on Sunday (23rd) and commit this patch if nobody fixes the MFS_ROOT problem before then.
Index: vfs_conf.c =================================================================== RCS file: /home/ncvs/src/sys/kern/vfs_conf.c,v retrieving revision 1.26 diff -c -r1.26 vfs_conf.c *** vfs_conf.c 1998/09/14 19:56:40 1.26 --- vfs_conf.c 1999/05/11 09:53:33 *************** *** 52,57 **** --- 52,58 ---- * on SMP reentrancy */ #include "opt_bootp.h" + #include "opt_mfs.h"
#include <sys/param.h> /* dev_t (types.h)*/ #include <sys/kernel.h> *************** *** 136,141 **** --- 137,145 ---- /* * Attempt the mount */ + #ifdef MFS_ROOT + err = VFS_MOUNT(mp, NULL, NULL, NULL, p); + #else err = ENXIO; orootdev = rootdev; if (rootdevs[0] == NODEV) *************** *** 154,159 **** --- 158,164 ---- if (err != ENXIO) break; } + #endif if (err) { /* * XXX should ask the user for the name in some cases.
-- John Birrell - jb...@cimlogic.com.au; jb...@freebsd.org http://www.cimlogic.com.au/ CIMlogic Pty Ltd, GPO Box 117A, Melbourne Vic 3001, Australia +61 418 353 137
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