Date: Sat, 09 Nov 2002 14:26:56 -0800 From: "Joel M. Baldwin" <qumqats@outel.org> To: current@freebsd.org Subject: Panics instead of Hard Locks Message-ID: <40095464.1036852016@[192.168.1.20]>
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Since going from a SMP to nonSMP kernel the Hard Locks don't
seem to be happening. However I'm getting panics.
I've gotten 4 'sleeping thread owns a mutex' panics and one each
of 'Assertion i != 0 failed at ../../../kern/subr_witness.c:669'
and 'Duplicate free of item 0xc3895cc0 from zone 0xc0ea63c0(VMSPACE)'
More info follows. I finally got a debugger kernel built so I'll
have even more info after the next panic. Let me know what I can
do to help.
--------------------------------------------------------------
panic: Assertion i != 0 failed at ../../../kern/subr_witness.c:669
Debugger("panic")
Stopped at Debugger+0x54: xchgl %ebx,in_Debugger.0
db> bt
No such command
db> x
Debugger+0x54: 29401d87
db> t
Debugger(c038693f,c03f6020,c0389a7b,cd2e2b00,1) at Debugger+0x54
panic(c0389a7b,c0389cee,c038993f,29d,cd2e2b64) at panic+0xab
witness_lock(c03c29a0,8,c0386f4e,134,c0385a95) at witness_lock+0x513
_mtx_lock_flags(c03c29a0,0,c0386f4e,134,cd2e2b90) at
_mtx_lock_flags+0xb1
msleep(c265d504,c03f4974,44,c039acd9,0) at msleep+0x644
acquire(c265d504,1000000,600,e3,5) at acquire+0xa7
lockmgr(c265d504,2,0,c0eadea0,cd2e2c2c) at lockmgr+0x378
_vm_map_lock_read(c265d4c8,c039ad3c,153,c0385a95,c265c700) at
_vm_map_lock_read+0x5b
vmspace_swap_count(c265d4c8,0,c039c4d2,493,0) at vmspace_swap_count+0x29
vm_pageout_scan(0,0,44,c039c590,1f4) at vm_pageout_scan+0xa48
vm_pageout(0,cd2e2d48,c0384133,354,0) at vm_pageout+0x262
fork_exit(c03163b0,0,cd2e2d48) at fork_exit+0xa5
fork_trampoline() at fork_trampoline+0x1a
--- trap 0x1, eip = 0, esp = 0xcd2e2d7c, ebp = 0 ---
------------------------------------------------------------------------
panic: Duplicate free of item 0xc3895cc0 from zone 0xc0ea63c0(VMSPACE)
Debugger("panic")
Stopped at Debugger+0x54: xchgl %ebx,in_Debugger.0
db> t
Debugger(c038693f,c03f6020,c039cbea,cdccac4c,1) at Debugger+0x54
panic(c039cbea,c3895cc0,c0ea63c0,c039ad51,693) at panic+0xab
uma_dbg_free(c0ea63c0,0,c3895cc0,693,0) at uma_dbg_free+0x122
uma_zfree_arg(c0ea63c0,c3895cc0,0,12d,c2f75e00) at uma_zfree_arg+0xfa
vmspace_free(c3895cc0,c039a9c3,31d,31c,186a0) at vmspace_free+0xbe
swapout_procs(1,0,68,c039c590,0) at swapout_procs+0x387
vm_daemon(0,cdccad48,c0384133,354,0) at vm_daemon+0x6e
fork_exit(c03166b0,0,cdccad48) at fork_exit+0xa5
fork_trampoline() at fork_trampoline+0x1a
--- trap 0x1, eip = 0, esp = 0xcdccad7c, ebp = 0 ---
------------------------------------------------------------------
panic: sleeping thread owns a mutex
Debugger("panic")
Stopped at Debugger+0x54: xchgl %ebx,in_Debugger.0
db> t
Debugger(c038693f,c03f6020,c0385b1e,cd29ac14,1) at Debugger+0x54
panic(c0385b1e,1,c0385a95,6b,0) at panic+0xab
propagate_priority(c0eaca90,2,c0385a95,23b,c0eaca90) at
propagate_priority+0x13c
_mtx_lock_sleep(c2c090b0,0,c0392b8d,182,c03f90f8) at
_mtx_lock_sleep+0x219
_mtx_lock_flags(c2c090b0,0,c0392b8d,182,c038760b) at
_mtx_lock_flags+0x97
syncache_timer(0,0,c038760b,bf,2edb5a) at syncache_timer+0xaf
softclock(0,0,c03843cc,230,c0eaba80) at softclock+0x19c
ithread_loop(c0e9fa00,cd29ad48,c0384133,354,0) at ithread_loop+0x182
fork_exit(c01fb6b0,c0e9fa00,cd29ad48) at fork_exit+0xa5
fork_trampoline() at fork_trampoline+0x1a
--- trap 0x1, eip = 0, esp = 0xcd29ad7c, ebp = 0 ---
-----------------------------------------------------------------
panic: sleeping thread owns a mutex
Debugger("panic")
Stopped at Debugger+0x54: xchgl %ebx,in_Debugger.0
db> t
Debugger(c038693f,c03f6020,c0385b1e,cd29ac14,1) at Debugger+0x54
panic(c0385b1e,1,c0385a95,6b,0) at panic+0xab
propagate_priority(c0eaca90,2,c0385a95,23b,c0eaca90) at
propagate_priority+0x13c
_mtx_lock_sleep(c2da9c7c,0,c0392b8d,182,c03f90f8) at
_mtx_lock_sleep+0x219
_mtx_lock_flags(c2da9c7c,0,c0392b8d,182,c038760b) at
_mtx_lock_flags+0x97
syncache_timer(0,0,c038760b,bf,20be24) at syncache_timer+0xaf
softclock(0,0,c03843cc,230,c0eaba80) at softclock+0x19c
ithread_loop(c0e9fa00,cd29ad48,c0384133,354,0) at ithread_loop+0x182
fork_exit(c01fb6b0,c0e9fa00,cd29ad48) at fork_exit+0xa5
fork_trampoline() at fork_trampoline+0x1a
--- trap 0x1, eip = 0, esp = 0xcd29ad7c, ebp = 0 ---
-----------------------------------------------------------------
anic: sleeping thread owns a mutex
Debugger("panic")
Stopped at Debugger+0x54: xchgl %ebx,in_Debugger.0
db> t
Debugger(c038693f,c03f6020,c0385b1e,cd29ac14,1) at Debugger+0x54
panic(c0385b1e,1,c0385a95,6b,0) at panic+0xab
propagate_priority(c0eaca90,2,c0385a95,23b,c0eaca90) at
propagate_priority+0x13c
_mtx_lock_sleep(c2f630b0,0,c0392b8d,182,c03f90f8) at
_mtx_lock_sleep+0x219
_mtx_lock_flags(c2f630b0,0,c0392b8d,182,c038760b) at
_mtx_lock_flags+0x97
syncache_timer(2,0,c038760b,bf,124b9a) at syncache_timer+0xaf
softclock(0,0,c03843cc,230,c0eaba80) at softclock+0x19c
ithread_loop(c0e9fa00,cd29ad48,c0384133,354,0) at ithread_loop+0x182
fork_exit(c01fb6b0,c0e9fa00,cd29ad48) at fork_exit+0xa5
fork_trampoline() at fork_trampoline+0x1a
--- trap 0x1, eip = 0, esp = 0xcd29ad7c, ebp = 0 ---
-----------------------------------------------------------------
panic: sleeping thread owns a mutex
Debugger("panic")
Stopped at Debugger+0x54: xchgl %ebx,in_Debugger.0
db> t
Debugger(c038693f,c03f6020,c0385b1e,cd29ac14,1) at Debugger+0x54
panic(c0385b1e,1,c0385a95,6b,0) at panic+0xab
propagate_priority(c0eaca90,2,c0385a95,23b,c0eaca90) at
propagate_priority+0x13c
_mtx_lock_sleep(c2856c7c,0,c0392b8d,182,c03f90f8) at
_mtx_lock_sleep+0x219
_mtx_lock_flags(c2856c7c,0,c0392b8d,182,c038760b) at
_mtx_lock_flags+0x97
syncache_timer(3,0,c038760b,bf,bc26) at syncache_timer+0xaf
softclock(0,0,c03843cc,230,c0eaba80) at softclock+0x19c
ithread_loop(c0e9fa00,cd29ad48,c0384133,354,0) at ithread_loop+0x182
fork_exit(c01fb6b0,c0e9fa00,cd29ad48) at fork_exit+0xa5
fork_trampoline() at fork_trampoline+0x1a
--- trap 0x1, eip = 0, esp = 0xcd29ad7c, ebp = 0 ---
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