kern/120282: panic: resource_list_release: resource entry is
not busy in FreeBSD-7.0
ganbold
ganbold at freebsd.org
Sat May 3 12:49:22 UTC 2008
More information (with recent 7.0-STABLE FreeBSD 7.0-STABLE #4: Sat May
3 19:15:56 ULAT 2008):
...
Unread portion of the kernel message buffer:
panic: resource_list_release: resource entry is not busy
cpuid = 0
KDB: stack backtrace:
db_trace_self_wrapper(c08d3a30,e43d0bb8,c065d76f,c08f78d4,0,...) at
db_trace_self_wrapper+0x26
kdb_backtrace(c08f78d4,0,c08d3536,e43d0bc4,0,...) at kdb_backtrace+0x29
panic(c08d3536,3,10,0,c4093940,...) at panic+0x10f
resource_list_release(c409b404,c4053480,c40a4d00,3,10,...) at
resource_list_release+0xc2
bus_generic_rl_release_resource(c4053480,c40a4d00,3,10,c4080180) at
bus_generic_rl_release_resource+0x77
bus_release_resource(c40a4d00,3,10,c4080180,c40a4d00,...) at
bus_release_resource+0x67
ath_pci_detach(c40a4d00,c3f51850,c0967e90,979,4,...) at ath_pci_detach+0xb2
device_detach(c40a4d00,e43d0cac,e43d0cb0,c09b7e10,0,...) at
device_detach+0x8c
cardbus_detach_card(c4053480,c3faa0b8,c0926c3c,1df,c09ba780,...) at
cardbus_detach_card+0xcd
cbb_event_thread(c3fbc000,e43d0d38,c08cd248,307,c404d804,...) at
cbb_event_thread+0x15a
fork_exit(c05570e0,c3fbc000,e43d0d38) at fork_exit+0xb8
fork_trampoline() at fork_trampoline+0x8
--- trap 0, eip = 0, esp = 0xe43d0d70, ebp = 0 ---
KDB: enter: panic
panic: from debugger
cpuid = 0
Uptime: 1m2s
Physical memory: 1002 MB
Dumping 61 MB: 46 30 14
#0 doadump () at pcpu.h:195
195 __asm __volatile("movl %%fs:0,%0" : "=r" (td));
(kgdb) bt
#0 doadump () at pcpu.h:195
#1 0xc065d4de in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:418
#2 0xc065d7a3 in panic (fmt=Variable "fmt" is not available.
) at /usr/src/sys/kern/kern_shutdown.c:572
#3 0xc04668d7 in db_panic (addr=Could not find the frame base for
"db_panic".
) at /usr/src/sys/ddb/db_command.c:446
#4 0xc04672dc in db_command (last_cmdp=0xc0999974, cmd_table=0x0,
dopager=1) at /usr/src/sys/ddb/db_command.c:413
#5 0xc04673ea in db_command_loop () at /usr/src/sys/ddb/db_command.c:466
#6 0xc0468bdd in db_trap (type=3, code=0) at /usr/src/sys/ddb/db_main.c:228
#7 0xc0686276 in kdb_trap (type=3, code=0, tf=0xe43d0b44) at
/usr/src/sys/kern/subr_kdb.c:524
#8 0xc0860f5f in trap (frame=0xe43d0b44) at
/usr/src/sys/i386/i386/trap.c:648
#9 0xc084710b in calltrap () at /usr/src/sys/i386/i386/exception.s:139
#10 0xc06863fa in kdb_enter_why (why=0xc08d0f30 "panic", msg=0xc08d0f30
"panic") at cpufunc.h:60
#11 0xc065d78c in panic (fmt=0xc08d3536 "resource_list_release: resource
entry is not busy") at /usr/src/sys/kern/kern_shutdown.c:556
#12 0xc0682b22 in resource_list_release (rl=0xc409b404, bus=0xc4053480,
child=0xc40a4d00, type=3, rid=16, res=0xc4080180)
at /usr/src/sys/kern/subr_bus.c:2777
#13 0xc0682c17 in bus_generic_rl_release_resource (dev=0xc4053480,
child=0xc40a4d00, type=3, rid=16, r=0xc4080180)
at /usr/src/sys/kern/subr_bus.c:3328
#14 0xc06827c7 in bus_release_resource (dev=0xc40a4d00, type=3, rid=16,
r=0xc4080180) at bus_if.h:347
#15 0xc04aaaf2 in ath_pci_detach (dev=0xc40a4d00) at
/usr/src/sys/dev/ath/if_ath_pci.c:223
#16 0xc0680ddc in device_detach (dev=0xc40a4d00) at device_if.h:212
#17 0xc04c3afd in cardbus_detach_card (cbdev=0xc4053480) at
/usr/src/sys/dev/cardbus/cardbus.c:236
#18 0xc055723a in cbb_event_thread (arg=0xc3fbc000) at card_if.h:95
#19 0xc063bcb8 in fork_exit (callout=0xc05570e0 <cbb_event_thread>,
arg=0xc3fbc000, frame=0xe43d0d38) at /usr/src/sys/kern/kern_fork.c:783
#20 0xc0847180 in fork_trampoline () at
/usr/src/sys/i386/i386/exception.s:205
(kgdb) list
205 call fork_exit
206 addl $12,%esp
207 /* cut from syscall */
208
209 /*
210 * Return via doreti to handle ASTs.
211 */
212 MEXITCOUNT
213 jmp doreti
214
(kgdb) up
#1 0xc065d4de in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:418
418 doadump();
(kgdb) up
#2 0xc065d7a3 in panic (fmt=Variable "fmt" is not available.
) at /usr/src/sys/kern/kern_shutdown.c:572
572 boot(bootopt);
(kgdb) up
#3 0xc04668d7 in db_panic (addr=Could not find the frame base for
"db_panic".
) at /usr/src/sys/ddb/db_command.c:446
446 panic("from debugger");
(kgdb) up
#4 0xc04672dc in db_command (last_cmdp=0xc0999974, cmd_table=0x0,
dopager=1) at /usr/src/sys/ddb/db_command.c:413
413 (*cmd->fcn)(addr, have_addr, count, modif);
(kgdb) up
#5 0xc04673ea in db_command_loop () at /usr/src/sys/ddb/db_command.c:466
466 db_command(&db_last_command, &db_command_table, /*
dopager */ 1);
(kgdb) up
#6 0xc0468bdd in db_trap (type=3, code=0) at /usr/src/sys/ddb/db_main.c:228
228 db_command_loop();
(kgdb) up
#7 0xc0686276 in kdb_trap (type=3, code=0, tf=0xe43d0b44) at
/usr/src/sys/kern/subr_kdb.c:524
524 handled = kdb_dbbe->dbbe_trap(type, code);
(kgdb) up
#8 0xc0860f5f in trap (frame=0xe43d0b44) at
/usr/src/sys/i386/i386/trap.c:648
648 if (kdb_trap(type, 0, frame))
(kgdb) up
#9 0xc084710b in calltrap () at /usr/src/sys/i386/i386/exception.s:139
139 call trap
Current language: auto; currently asm
(kgdb) up
#10 0xc06863fa in kdb_enter_why (why=0xc08d0f30 "panic", msg=0xc08d0f30
"panic") at cpufunc.h:60
60 __asm __volatile("int $3");
Current language: auto; currently c
(kgdb) up
#11 0xc065d78c in panic (fmt=0xc08d3536 "resource_list_release: resource
entry is not busy") at /usr/src/sys/kern/kern_shutdown.c:556
556 kdb_enter_why(KDB_WHY_PANIC, "panic");
(kgdb) list
551
552 #ifdef KDB
553 if (newpanic && trace_on_panic)
554 kdb_backtrace();
555 if (debugger_on_panic)
556 kdb_enter_why(KDB_WHY_PANIC, "panic");
557 #ifdef RESTARTABLE_PANICS
558 /* See if the user aborted the panic, in which case we
continue. */
559 if (panicstr == NULL) {
560 #ifdef SMP
(kgdb) up
#12 0xc0682b22 in resource_list_release (rl=0xc409b404, bus=0xc4053480,
child=0xc40a4d00, type=3, rid=16, res=0xc4080180)
at /usr/src/sys/kern/subr_bus.c:2777
2777 panic("resource_list_release: resource entry is not busy");
(kgdb) list
2772 rle = resource_list_find(rl, type, rid);
2773
2774 if (!rle)
2775 panic("resource_list_release: can't find resource");
2776 if (!rle->res)
2777 panic("resource_list_release: resource entry is not busy");
2778
2779 error = BUS_RELEASE_RESOURCE(device_get_parent(bus), child,
2780 type, rid, res);
2781 if (error)
(kgdb) print rle
$1 = (struct resource_list_entry *) 0xc08d0f30
(kgdb) print rle->res
$2 = (struct resource *) 0x705f6e6f
(kgdb) up
#13 0xc0682c17 in bus_generic_rl_release_resource (dev=0xc4053480,
child=0xc40a4d00, type=3, rid=16, r=0xc4080180)
at /usr/src/sys/kern/subr_bus.c:3328
3328 return (resource_list_release(rl, dev, child, type, rid, r));
(kgdb)
-------------------------------------------------------------------------------------------------------------------------------
I've made some printfs in subr_bus.c something like:
...
printf("calling resource_list_release: ***1***\n");
if (passthrough) {
printf("passthrough: calling resource_list_release: ***1***\n");
return (BUS_RELEASE_RESOURCE(device_get_parent(bus), child,
type, rid, res));
}
rle = resource_list_find(rl, type, rid);
printf("resource_list_release: rle: %p\n",rle);
printf("resource_list_release: res: %p\n",rle->res);
if (!rle)
panic("resource_list_release: can't find resource");
if (!rle->res)
panic("resource_list_release: resource entry is not busy");
printf("calling resource_list_release: ***2***\n");
error = BUS_RELEASE_RESOURCE(device_get_parent(bus), child,
type, rid, res);
if (error)
return (error);
rle->res = NULL;
return (0);
...
printf messages appear in following order when I detach ath0 card:
...
calling bus_release_resource: ***1***
calling resource_list_release: ***1***
resource_list_release: rle: 0xc4057840
resource_list_release: res: 0xc4093940
calling resource_list_release: ***2***
calling resource_list_release: ***1***
passthrough: calling resource_list_release: ***1***
calling bus_generic_release_resource: ***1***
calling resource_list_release: ***1***
passthrough: calling resource_list_release: ***1***
calling bus_generic_release_resource: ***1***
calling bus_release_resource: ***1***
calling resource_list_release: ***1***
resource_list_release: rle: 0xc4057600
resource_list_release: res: 0
panic: resource_list_release: resource entry is not busy
...
I have a question here.
Why is resource_list_release() called several times? Is it because it is
trying to release resources from bottom to up of device tree?
Correct me if I'm wrong here.
As I understand during the last function call rle->res is null and it
panics with message.
Following fixes the problem:
...
/* if (!rle->res)
panic("resource_list_release: resource entry is not busy");
*/
if (rle->res != NULL){
error = BUS_RELEASE_RESOURCE(device_get_parent(bus), child,
type, rid, res);
if (error)
return (error);
rle->res = NULL;
}
...
However I think this is a just bad workaround and not the correct fix.
I think it is not fixing the root of the problem.
Is there any idea how to fix this problem?
Warner, can you look at this issue if you have time?
thanks,
Ganbold
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