Date: Sun, 28 Jun 1998 23:19:30 +0200 From: Ollivier Robert <roberto@keltia.freenix.fr> To: current@FreeBSD.ORG Subject: Re: Softupdate related panic :( Message-ID: <19980628231930.A11745@keltia.freenix.fr> In-Reply-To: <Pine.BSF.3.96.980626175051.15032A-100000@duey.hs.wolves.k12.mo.us>; from Chris Dillon on Fri, Jun 26, 1998 at 06:00:16PM -0500 References: <Pine.BSF.3.96.980626175051.15032A-100000@duey.hs.wolves.k12.mo.us>
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According to Chris Dillon:
> to tell you the truth. If i used 'config -g' when building my kernel,
> would that give more informative crashdumps? How about doing something
Argument given to functions and ability to print values of various
variables. Here is what I sent to Julian a couple days ago:
GDB is free software and you are welcome to distribute copies of it
under certain conditions; type "show copying" to see the conditions.
There is absolutely no warranty for GDB; type "show warranty" for details.
GDB 4.16 (i386-unknown-freebsd), Copyright 1996 Free Software Foundation, Inc.
(kgdb) symbol-file kernel.debug
Reading symbols from kernel.debug...done.
(kgdb) exec-file /var/crash/kernel.30
(kgdb) core-file /var/crash/vmcore.30
IdlePTD 231000
initial pcb at 1dd5cc
panicstr: handle_workitem_freeblocks: block count
panic messages:
---
dmesg: magic number incorrect
---
#0 boot (howto=260) at ../../kern/kern_shutdown.c:296
296 break;
(kgdb) where
#0 boot (howto=260) at ../../kern/kern_shutdown.c:296
#1 0xf0113797 in panic (fmt=0xf0101498 "from debugger")
at ../../kern/kern_shutdown.c:436
[...]
#13 0xf010696e in kproc_start (udata=0xf01cdea4) at ../../kern/init_main.c:245
#14 0xf0197e39 in fork_trampoline ()
Cannot access memory at address 0x1.
(kgdb) up 9
#9 0xf011378e in panic (
fmt=0xf01746fc "handle_workitem_freeblocks: block count")
at ../../kern/kern_shutdown.c:434
434 */
(kgdb) up
#10 0xf017496f in handle_workitem_freeblocks (freeblks=0xf0b0ad80)
at ../../ufs/ffs/ffs_softdep.c:1966
1966 softdep_error("handle_workitem_freeblks", allerror);
(kgdb) list
1961
1962 #ifdef DIAGNOSTIC
1963 if (freeblks->fb_chkcnt != blocksreleased)
1964 panic("handle_workitem_freeblocks: block count");
1965 if (allerror)
1966 softdep_error("handle_workitem_freeblks", allerror);
1967 #endif /* DIAGNOSTIC */
1968 WORKITEM_FREE(freeblks, D_FREEBLKS);
1969 num_freeblks -= 1;
1970 }
(kgdb) print *freeblks
$2 = {fb_list = {wk_list = {le_next = 0xf0bb1ca0, le_prev = 0xf01e35c8},
wk_type = 8, wk_state = 0}, fb_previousinum = 17410,
fb_devvp = 0xf5867ba0, fb_fs = 0xf09a2800, fb_oldsize = 0x000000000002e000,
fb_newsize = 0x0000000000000000, fb_chkcnt = 384, fb_uid = 0, fb_dblks = {
111464, 111472, 111480, 111488, 111496, 111504, 111512, 111520, 111528,
111536, 111544, 111552}, fb_iblks = {111560, 0, 0}}
(kgdb) print blocksreleased
$3 = 400
--
Ollivier ROBERT -=- FreeBSD: The Power to Serve! -=- roberto@keltia.freenix.fr
FreeBSD keltia.freenix.fr 3.0-CURRENT #11: Sat Jun 27 00:41:06 CEST 1998
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