[Bug 225450] 11.1-* panics on AMD Opteron 2k due to EARLY_AP_STARTUP

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=225450

John Baldwin  changed:

   What|Removed |Added

 Resolution|--- |DUPLICATE
 Status|New |Closed

--- Comment #23 from John Baldwin  ---
Sorry I wasn't able to track this down earlier.  I knew when looking at the
other bug (228768) that I had tried to investigate this before but couldn't
find this bug.

*** This bug has been marked as a duplicate of bug 228768 ***

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[Bug 225450] 11.1-* panics on AMD Opteron 2k due to EARLY_AP_STARTUP

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=225450

--- Comment #22 from m...@rubenvos.com ---
Hi,

Just to follow up: 12.0 RC-1 boots perfectly on our Opteron cpu's. I upgraded
from 11.0 to 12.0 RC-1 , haven't tried 11.2.

Ruben

---<>---
Copyright (c) 1992-2018 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
The Regents of the University of California. All rights reserved.
FreeBSD is a registered trademark of The FreeBSD Foundation.
FreeBSD 12.0-RC1 r340470 GENERIC amd64
FreeBSD clang version 6.0.1 (tags/RELEASE_601/final 335540) (based on LLVM
6.0.1)
VT(vga): resolution 640x480
CPU: Quad-Core AMD Opteron(tm) Processor 2356 (2300.14-MHz K8-class CPU)
  Origin="AuthenticAMD"  Id=0x100f23  Family=0x10  Model=0x2  Stepping=3
 
Features=0x178bfbff
  Features2=0x802009
  AMD
Features=0xee500800
  AMD Features2=0x7ff
  SVM: NP,NAsids=64
  TSC: P-state invariant
real memory  = 25769803776 (24576 MB)
avail memory = 25003937792 (23845 MB)
Event timer "LAPIC" quality 100
ACPI APIC Table: 
FreeBSD/SMP: Multiprocessor System Detected: 8 CPUs
FreeBSD/SMP: 2 package(s) x 4 core(s)
random: unblocking device.
ioapic0  irqs 0-23 on motherboard
ioapic1  irqs 24-47 on motherboard
Launching APs: 4 5 2 6 3 7 1
Timecounter "TSC-low" frequency 1150069463 Hz quality 800
random: entropy device external interface
kbd1 at kbdmux0
netmap: loaded module
[ath_hal] loaded
module_register_init: MOD_LOAD (vesa, 0x810f8690, 0) error 19
nexus0
vtvga0:  on motherboard

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[Bug 225450] 11.1-* panics on AMD Opteron 2k due to EARLY_AP_STARTUP

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=225450

--- Comment #20 from John Baldwin  ---
Grrr, not sure why my patch didn't prevent it from recursing.  You could try
'|| cold' instead of '|| n == 1' perhaps.  You could also try changing the
'DELAY(1)' in _mtx_lock_indefinite_check() in sys/kern/kern_mutex.c to be
something like 'if (cold) cpu_spinwait(); else DELAY(1);' instead of the 'n ==
1' hack.

Oh, I see why 'n == 1' didn't help.  The early_delay callback that is used when
that 'n == 1' check fails is i8254_delay (set in amd64/amd64/machdep.c).

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[Bug 225450] 11.1-* panics on AMD Opteron 2k due to EARLY_AP_STARTUP

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=225450

--- Comment #19 from Pablo Ruiz  ---
Hi,

Did you guys had a chance to take another look at this? May I help with any
test?

Regards
Pablo

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[Bug 225450] 11.1-* panics on AMD Opteron 2k due to EARLY_AP_STARTUP

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=225450

--- Comment #18 from Pablo Ruiz  ---
I've tried the following patch:

diff --git a/sys/x86/x86/delay.c b/sys/x86/x86/delay.c
index 8cbe6012a96..00dfff48c19 100644
--- a/sys/x86/x86/delay.c
+++ b/sys/x86/x86/delay.c
@@ -70,7 +70,7 @@ delay_tc(int n)
func = get_tsc;
mask = ~0u;
} else {
-   if (tc->tc_quality <= 0)
+   if (tc->tc_quality <= 0 || n == 1)
return (0);
func = tc->tc_get_timecount;
mask = tc->tc_counter_mask;
diff --git a/sys/x86/x86/mp_x86.c b/sys/x86/x86/mp_x86.c
index 04975dd8a2e..c2a90e9a7d4 100644
--- a/sys/x86/x86/mp_x86.c
+++ b/sys/x86/x86/mp_x86.c
@@ -952,7 +952,7 @@ init_secondary_tail(void)
 #endif

mtx_unlock_spin(_boot_mtx);
-while(1);
+//while(1);

/* Wait until all the AP's are up. */
while (atomic_load_acq_int(_started) == 0)

.

But I got to 'db' prompt to:

cpu0 BSP:
 ID: 0x   VER: 0x80050010 LDR: 0x DFR: 0x
  lint0: 0x00010700 lint1: 0x0400 TPR: 0x SVR: 0x01ff
  timer: 0x000100ef therm: 0x0001 err: 0x00f0 pmc: 0x00010400
   AMD ext features: 0x00010003
   AMD elvt0: 0x0001
SMP: AP CPU #1 Launched!
cpu1 AP:


FFa
tFa

FFa

FFa
Fa
kFernel trap 12 with interrupts disabled


Fatal trap 12: page fault while in kernel mode
cpuid = 2; apic id = 02
fault virtual address   = 0x441
fault code  = supervisor read data, page not present
instruction pointer = 0x20:0x80ffb704
stack pointer   = 0x28:0xfe001b97ba90
frame pointer   = 0x28:0xfe001b97baa0
code segment= base 0x0, limit 0xf, type 0x1b
= DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags= resume, IOPL = 0
current process = 11 (idle: cpu2)
[ thread pid 11 tid 15 ]
Stopped at  spinlock_exit+0x14: movq0x440(%rbx),%rax
db> show thread
Thread 15 at 0xf8000332c000:
 proc (pid 11): 0xf80003328000
 name: idle: cpu2
 stack: 0xfe001b9a6000-0xfe001b9a9fff
 flags: 0x40024  pflags: 0x20
 state: CAN RUN
 priority: 255
 container lock: sched lock 0 (0x827ee880)
db> bt
Tracing pid 11 tid 15 td 0xf8000332c000
spinlock_exit() at spinlock_exit+0x14/frame 0xfe001b97baa0
_mtx_lock_spin_cookie() at _mtx_lock_spin_cookie+0xa5/frame 0xfe001b97bb10
i8254_delay() at i8254_delay+0x143/frame 0xfe001b97bb50
_mtx_lock_spin_cookie() at _mtx_lock_spin_cookie+0xa5/frame 0xfe001b97bbc0
i8254_delay() at i8254_delay+0x143/frame 0xfe001b97bc00
_mtx_lock_spin_cookie() at _mtx_lock_spin_cookie+0xa5/frame 0xfe001b97bc70
i8254_delay() at i8254_delay+0x143/frame 0xfe001b97bcb0
_mtx_lock_spin_cookie() at _mtx_lock_spin_cookie+0xa5/frame 0xfe001b97bd20
i8254_delay() at i8254_delay+0x143/frame 0xfe001b97bd60
_mtx_lock_spin_cookie() at _mtx_lock_spin_cookie+0xa5/frame 0xfe001b97bdd0
i8254_delay() at i8254_delay+0x143/frame 0xfe001b97be10
_mtx_lock_spin_cookie() at _mtx_lock_spin_cookie+0xa5/frame 0xfe001b97be80
i8254_delay() at i8254_delay+0x143/frame 0xfe001b97bec0
_mtx_lock_spin_cookie() at _mtx_lock_spin_cookie+0xa5/frame 0xfe001b97bf30
i8254_delay() at i8254_delay+0x143/frame 0xfe001b97bf70
_mtx_lock_spin_cookie() at _mtx_lock_spin_cookie+0xa5/frame 0xfe001b97bfe0
i8254_delay() at i8254_delay+0x143/frame 0xfe001b97c020
_mtx_lock_spin_cookie() at _mtx_lock_spin_cookie+0xa5/frame 0xfe001b97c090


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[Bug 225450] 11.1-* panics on AMD Opteron 2k due to EARLY_AP_STARTUP

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=225450

--- Comment #17 from Pablo Ruiz  ---
Hi John,

The CPU mode is 'AMD Opteron(tm) Processor SE (Dual Core)'.

I'll try the patch you suggested and report back..

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[Bug 225450] 11.1-* panics on AMD Opteron 2k due to EARLY_AP_STARTUP

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=225450

Mark Linimon  changed:

   What|Removed |Added

   Keywords||patch

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[Bug 225450] 11.1-* panics on AMD Opteron 2k due to EARLY_AP_STARTUP

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=225450

--- Comment #16 from John Baldwin  ---
(In reply to Pablo Ruiz from comment #14)
Thanks, this gives me what I was looking for.  We have infinite recursion
because the spin lock code is calling DELAY() which is trying to grab a spin
lock.

One question is why isn't DELAY using the tsc?

Hmm, it seems 'tsc_is_invariant' isn't set.  Are these older AMD CPUs?

You can try this as a hack-workaround to verify it fixes the issue, but I need
to think a bit more about what the right fix might be:

Index: x86/x86/delay.c
===
--- delay.c (revision 329004)
+++ delay.c (working copy)
@@ -72,7 +72,7 @@
func = get_tsc;
mask = ~0u;
} else {
-   if (tc->tc_quality <= 0)
+   if (tc->tc_quality <= 0 || n == 1)
return (0);
func = tc->tc_get_timecount;
mask = tc->tc_counter_mask;

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[Bug 225450] 11.1-* panics on AMD Opteron 2k due to EARLY_AP_STARTUP

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=225450

--- Comment #15 from Pablo Ruiz  ---
And, finally if I move the while(1) just after the mtx_unlock_spin call, like
this:

diff --git a/sys/x86/x86/mp_x86.c b/sys/x86/x86/mp_x86.c
index 1c257d87e58..04975dd8a2e 100644
--- a/sys/x86/x86/mp_x86.c
+++ b/sys/x86/x86/mp_x86.c
@@ -950,9 +950,9 @@ init_secondary_tail(void)
load_es(_udatasel);
load_fs(_ufssel);
 #endif
-while(1);

mtx_unlock_spin(_boot_mtx);
+while(1);

/* Wait until all the AP's are up. */
while (atomic_load_acq_int(_started) == 0)

We arrive to the original behaviour of no 'db' prompt, and somewhat garbaged
crash:

[...]
cpu0 BSP:
 ID: 0x   VER: 0x80050010 LDR: 0x DFR: 0x
  lint0: 0x00010700 lint1: 0x0400 TPR: 0x SVR: 0x01ff
  timer: 0x000100ef therm: 0x0001 err: 0x00f0 pmc: 0x00010400
   AMD ext features: 0x00010003
   AMD elvt0: 0x0001
SMP: AP CPU #1 Launched!
cpu1 AP:

Fa
Fa

FFa
Fa
Fa
Fa
Fata

.

I hope this helps.

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[Bug 225450] 11.1-* panics on AMD Opteron 2k due to EARLY_AP_STARTUP

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=225450

--- Comment #14 from Pablo Ruiz  ---
I've tried moving the while loop a bit down at mp_x86, and I got a db prompt
too:

diff --git a/sys/x86/x86/mp_x86.c b/sys/x86/x86/mp_x86.c
index 3cca61ca72e..1c257d87e58 100644
--- a/sys/x86/x86/mp_x86.c
+++ b/sys/x86/x86/mp_x86.c
@@ -925,7 +925,6 @@ init_secondary_tail(void)

CTR1(KTR_SMP, "SMP: AP CPU #%d Launched", cpuid);
printf("SMP: AP CPU #%d Launched!\n", cpuid);
-while(1);

/* Determine if we are a logical CPU. */
if (cpu_info[PCPU_GET(apic_id)].cpu_hyperthread)
@@ -951,6 +950,7 @@ while(1);
load_es(_udatasel);
load_fs(_ufssel);
 #endif
+while(1);

mtx_unlock_spin(_boot_mtx);

This is the relevant boot output:

[...]
cpu0 BSP:
 ID: 0x   VER: 0x80050010 LDR: 0x DFR: 0x
  lint0: 0x00010700 lint1: 0x0400 TPR: 0x SVR: 0x01ff
  timer: 0x000100ef therm: 0x0001 err: 0x00f0 pmc: 0x00010400
   AMD ext features: 0x00010003
   AMD elvt0: 0x0001
SMP: AP CPU #1 Launched!
cpu1 AP:

Fa
kFernel trap 12 with interrupts disabled


Fatal trap 12: page fault while in kernel mode
cpuid = 2; apic id = 02
fault virtual address   = 0x441
fault code  = supervisor read data, page not present
instruction pointer = 0x20:0x80ffb704
stack pointer   = 0x28:0xfe001b979d00
frame pointer   = 0x28:0xfe001b979d10
code segment= base 0x0, limit 0xf, type 0x1b
= DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags= resume, IOPL = 0
current process = 11 (idle: cpu2)
[ thread pid 11 tid 15 ]
Stopped at  spinlock_exit+0x14: movq0x440(%rbx),%rax
db> bt
Tracing pid 11 tid 15 td 0xf8000332c000
spinlock_exit() at spinlock_exit+0x14/frame 0xfe001b979d10
_mtx_lock_spin_cookie() at _mtx_lock_spin_cookie+0xa5/frame 0xfe001b979d80
i8254_delay() at i8254_delay+0x143/frame 0xfe001b979dc0
_mtx_lock_spin_cookie() at _mtx_lock_spin_cookie+0xa5/frame 0xfe001b979e30
i8254_delay() at i8254_delay+0x143/frame 0xfe001b979e70
_mtx_lock_spin_cookie() at _mtx_lock_spin_cookie+0xa5/frame 0xfe001b979ee0
i8254_delay() at i8254_delay+0x143/frame 0xfe001b979f20
_mtx_lock_spin_cookie() at _mtx_lock_spin_cookie+0xa5/frame 0xfe001b979f90
i8254_delay() at i8254_delay+0x143/frame 0xfe001b979fd0
_mtx_lock_spin_cookie() at _mtx_lock_spin_cookie+0xa5/frame 0xfe001b97a040
i8254_delay() at i8254_delay+0x143/frame 0xfe001b97a080
_mtx_lock_spin_cookie() at _mtx_lock_spin_cookie+0xa5/frame 0xfe001b97a0f0
i8254_delay() at i8254_delay+0x143/frame 0xfe001b97a130
_mtx_lock_spin_cookie() at _mtx_lock_spin_cookie+0xa5/frame 0xfe001b97a1a0
i8254_delay() at i8254_delay+0x143/frame 0xfe001b97a1e0
[... repeates quite a lot ]
_mtx_lock_spin_cookie() at _mtx_lock_spin_cookie+0x14a/frame 0xfe001b97cb90
i8254_delay() at i8254_delay+0x3a/frame 0xfe001b97cbd0
ns8250_putc() at ns8250_putc+0x2a/frame 0xfe001b97cc00
uart_cnputc() at uart_cnputc+0x47/frame 0xfe001b97cc20
cnputc() at cnputc+0x7d/frame 0xfe001b97cc50
cnputs() at cnputs+0x68/frame 0xfe001b97cc70
putchar() at putchar+0x14d/frame 0xfe001b97ccf0
kvprintf() at kvprintf+0x103d/frame 0xfe001b97cde0
vprintf() at vprintf+0x87/frame 0xfe001b97ceb0
printf() at printf+0x43/frame 0xfe001b97cf10
dblfault_handler() at dblfault_handler+0x26/frame 0xfe001b97cf30
Xdblfault() at Xdblfault+0xac/frame 0xfe001b97cf30
--- trap 0x17, rip = 0x81159ea5, rsp = 0xfe001b978000, rbp =
0xfe001b978030 ---
i8254_delay() at i8254_delay+0x35/frame 0xfe001b978030
_mtx_lock_spin_cookie() at _mtx_lock_spin_cookie+0x14a/frame 0xfe001b9780a0
i8254_delay() at i8254_delay+0x3a/frame 0xfe001b9780e0
_mtx_lock_spin_cookie() at _mtx_lock_spin_cookie+0x14a/frame 0xfe001b978150
[... more similar calls repeating omitted ...]
spinlock_exit() at spinlock_exit+0x14/frame 0xfe001b9785d0
[... more _mtx_lock_spin_cookie calls ...]

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[Bug 225450] 11.1-* panics on AMD Opteron 2k due to EARLY_AP_STARTUP

[bugzilla-noreply]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=225450

--- Comment #13 from Pablo Ruiz  ---
Hi again,

Adding the following patch:

diff --git a/sys/x86/x86/mp_x86.c b/sys/x86/x86/mp_x86.c
index 7cc02d663bf..3cca61ca72e 100644
--- a/sys/x86/x86/mp_x86.c
+++ b/sys/x86/x86/mp_x86.c
@@ -925,6 +925,7 @@ init_secondary_tail(void)

CTR1(KTR_SMP, "SMP: AP CPU #%d Launched", cpuid);
printf("SMP: AP CPU #%d Launched!\n", cpuid);
+while(1);

/* Determine if we are a logical CPU. */
if (cpu_info[PCPU_GET(apic_id)].cpu_hyperthread)

I get into db while crashing:

[...]
cpu0 BSP:
 ID: 0x   VER: 0x80050010 LDR: 0x DFR: 0x
  lint0: 0x00010700 lint1: 0x0400 TPR: 0x SVR: 0x01ff
  timer: 0x000100ef therm: 0x0001 err: 0x00f0 pmc: 0x00010400
   AMD ext features: 0x00010003
   AMD elvt0: 0x0001
SMP: AP CPU #1 Launched!
kkkerneel trap 12 with interrupts disabled


Fatal trap 12: page fault while in kernel mode
cpuid = 2; apic id = 02
fault virtual address   = 0x0
fault code  = supervisor write data, page not present
instruction pointer = 0x20:0x80bb739d
stack pointer   = 0x28:0xfe001b9835b0
frame pointer   = 0x28:0xfe001b983620
code segment= base 0x0, limit 0xf, type 0x1b
= DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags= resume, IOPL = 0
current process = 11 (idle: cpu2)
[ thread pid 11 tid 15 ]
Stopped at  putchar+0x15d:  movb$0,(%rax)
db> bt
Tracing pid 11 tid 15 td 0xf8000332c000
putchar() at putchar+0x15d/frame 0xfe001b983620
db> show all procs
  pid  ppid  pgrp   uid   state   wmesg wchancmd
   11 0 0 0  RL  (threaded)  [idle]
13   CanRun  [idle: cpu0]
14   CanRun  [idle: cpu1]
15   CanRun  [idle: cpu2]
16   CanRun  [idle: cpu3]
1 0 0 0  ?L  [kernel]
   10 0 0 0  RL  [audit]
0 0 0 0  RLs CPU 0   [swapper]
db> show all pcpu
Current CPU: 2

cpuid= 0
dynamic pcpu = 0x682000
curthread= 0x82883640: pid 0 "swapper"
curpcb   = 0x82c0ecc0
fpcurthread  = none
idlethread   = 0xf8000332d000: tid 13 "idle: cpu0"
curpmap  = 0x828af188
tssp = 0x828ad510
commontssp   = 0x828ad510
rsp0 = 0x82c0ecc0
gs32p= 0x828ad708
ldt  = 0x828ad748
tss  = 0x828ad738

cpuid= 1
dynamic pcpu = 0xfe00993f1000
curthread= 0xf8000332c580: pid 11 "idle: cpu1"
curpcb   = 0
fpcurthread  = none
idlethread   = 0xf8000332c580: tid 14 "idle: cpu1"
curpmap  = 0x828af188
tssp = 0x828ad578
commontssp   = 0x828ad578
rsp0 = 0x0
gs32p= 0x828ad770
ldt  = 0x828ad7b0
tss  = 0x828ad7a0

cpuid= 2
dynamic pcpu = 0xfe00993f9000
curthread= 0xf8000332c000: pid 11 "idle: cpu2"
curpcb   = 0
fpcurthread  = none
idlethread   = 0xf8000332c000: tid 15 "idle: cpu2"
curpmap  = 0x828af188
tssp = 0x828ad5e0
commontssp   = 0x828ad5e0
rsp0 = 0x0
gs32p= 0x828ad7d8
ldt  = 0x828ad818
tss  = 0x828ad808

cpuid= 3
dynamic pcpu = 0xfe0099401000
curthread= 0xf8000332b580: pid 11 "idle: cpu3"
curpcb   = 0
fpcurthread  = none
idlethread   = 0xf8000332b580: tid 16 "idle: cpu3"
curpmap  = 0x828af188
tssp = 0x828ad648
commontssp   = 0x828ad648
rsp0 = 0x0
gs32p= 0x828ad840
ldt  = 0x828ad880
tss  = 0x828ad870
db> show all trace

Tracing command idle pid 11 tid 13 td 0xf8000332d000
fork_trampoline() at fork_trampoline

Tracing command idle pid 11 tid 14 td 0xf8000332c580
fork_trampoline() at fork_trampoline

Tracing command idle pid 11 tid 15 td 0xf8000332c000
putchar() at putchar+0x15d/frame 0xfe001b983620

Tracing command idle pid 11 tid 16 td 0xf8000332b580
fork_trampoline() at fork_trampoline

Tracing command kernel pid 1 tid 12 td 0xf8000332d580
fork_trampoline() at fork_trampoline

Tracing command audit pid 10 tid 11 td 0xf8000332e000
fork_trampoline() at fork_trampoline

Tracing command kernel pid 0 tid 10 td 0x82883640
KDB: reentering
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfe001b982cc0
kdb_reenter() at kdb_reenter+0x2f/frame 0xfe001b982cd0
trap() at trap+0x4d/frame 

[Bug 225450] 11.1-* panics on AMD Opteron 2k due to EARLY_AP_STARTUP

[bugzilla-noreply]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=225450

--- Comment #11 from John Baldwin  ---
Hmm, I don't know why the previous simple lock didn't help.  One other possible
thing to try is placing 'while (1);' infinite loop in the init_secondary_tail()
function in sys/x86/x86/mp_x86.c and moving it around in the function to narrow
down when the APs are triggering the double fault (which is a stack overflow). 
If you put the while(1) before the smp_cpus++; the failure mode you should see
if the AP doesn't fault is a 'panic AP #x failed to start'.  After the
smp_cpus++ line you should at least no longer get the double fault panic if you
haven't hit the double fault yet.

Another thought is that it might be there is a missing MFC in 11 related to one
or more kthreads starting too early.  You could perhaps build a kernel with:

options KTR_COMPILE=KTR_PROC
options KTR_MASK=KTR_PROC
options KTR_VERBOSE

And see what messages are logged before the crash (to see if the APs are
starting to run other kthreads besides the idle thread).

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[Bug 225450] 11.1-* panics on AMD Opteron 2k due to EARLY_AP_STARTUP

[bugzilla-noreply]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=225450

--- Comment #10 from Pablo Ruiz  ---
Hi,

Is there anything I can help with this weekend? :)

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[Bug 225450] 11.1-* panics on AMD Opteron 2k due to EARLY_AP_STARTUP

[bugzilla-noreply]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=225450

--- Comment #9 from Pablo Ruiz  ---
Hi John,

I've tried your patch, but even after trying to boot quite a few times, I got
no stacktrace. All I got was:

[...]
MADT: Found IO APIC ID 17, Interrupt 56 at 0xfeafc000
ioapic2: Changing APIC ID to 17
ioapic2: WARNING: intbase 56 != expected base 55
ioapic2: ver 0x11 maxredir 0x06
MADT: Found IO APIC ID 14, Interrupt 24 at 0xfeaff000
ioapic3: WARNING: intbase 24 != expected base 63
ioapic3: ver 0x11 maxredir 0x17
MADT: Interrupt override: source 0, irq 2
ioapic0: Routing IRQ 0 -> intpin 2
MADT: Interrupt override: source 9, irq 9
ioapic0: intpin 9 trigger: level
ioapic3  irqs 24-47 on motherboard
ioapic0  irqs 0-23 on motherboard
ioapic1  irqs 48-54 on motherboard
ioapic2  irqs 56-62 on motherboard
cpu0 BSP:
 ID: 0x   VER: 0x80050010 LDR: 0x DFR: 0x
  lint0: 0x00010700 lint1: 0x0400 TPR: 0x SVR: 0x01ff
  timer: 0x000100ef therm: 0x0001 err: 0x00f0 pmc: 0x00010400
   AMD ext features: 0x00010003
   AMD elvt0: 0x0001
SMP: AP CPU #1 Launched!
cpu1 AP:




Some times it get to the point of printing 'Fa', or just ends up there w/o
showing anything else.. :(

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[Bug 225450] 11.1-* panics on AMD Opteron 2k due to EARLY_AP_STARTUP

[bugzilla-noreply]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=225450

--- Comment #8 from John Baldwin  ---
So it looks like the panic is a double fault.  Please try this hack patch to
see if it cleans up the printfs:

Index: amd64/amd64/trap.c
===
--- amd64/amd64/trap.c  (revision 328557)
+++ amd64/amd64/trap.c  (working copy)
@@ -830,6 +830,11 @@
 void
 dblfault_handler(struct trapframe *frame)
 {
+
+   static int dblflt_lock = 0;
+
+   while (!atomic_cmpset_int(_lock, 0, 1))
+   cpu_spinwait();
 #ifdef KDTRACE_HOOKS
if (dtrace_doubletrap_func != NULL)
(*dtrace_doubletrap_func)();

It won't fix the panic, but hopefully only one CPU will print out the messages
so we can debug this further.

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[Bug 225450] 11.1-* panics on AMD Opteron 2k due to EARLY_AP_STARTUP

[bugzilla-noreply]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=225450

--- Comment #7 from Pablo Ruiz  ---
Hi guys,

Did you need anything else from my side? May I help with some additional
diagnosis?

Best Regards

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[Bug 225450] 11.1-* panics on AMD Opteron 2k due to EARLY_AP_STARTUP

[bugzilla-noreply]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=225450

--- Comment #6 from Pablo Ruiz  ---
Created attachment 190117
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=190117=edit
verbose output of a kernel w/o EARLY_AP_STARTUP

For reference, attached is the verbose output of a kernel w/o EARLY_AP_STARTUP
from this same system.

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[Bug 225450] 11.1-* panics on AMD Opteron 2k due to EARLY_AP_STARTUP

[bugzilla-noreply]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=225450

--- Comment #5 from Pablo Ruiz  ---
Sure,

Here's a "boot -v" for a MAXCPU=4 kernel:

-
OK boot kernel.test -v
/boot/kernel.test/kernel text=0x16f3108 data=0xb66730+0x34fc98
syms=[0x8+0x1898e8+0x8+0x18a675]
Booting...
KDB: debugger backends: ddb
KDB: current backend: ddb
Table 'FACP' at 0xdbfb0290
Table 'APIC' at 0xdbfb0390
APIC: Found table at 0xdbfb0390
APIC: Using the MADT enumerator.
MADT: Found CPU APIC ID 0 ACPI ID 1: enabled
SMP: Added CPU 0 (AP)
MADT: Found CPU APIC ID 1 ACPI ID 2: enabled
SMP: Added CPU 1 (AP)
MADT: Found CPU APIC ID 2 ACPI ID 3: enabled
SMP: Added CPU 2 (AP)
MADT: Found CPU APIC ID 3 ACPI ID 4: enabled
SMP: Added CPU 3 (AP)
MADT: Found CPU APIC ID 132 ACPI ID 5: disabled
MADT: Found CPU APIC ID 133 ACPI ID 6: disabled
MADT: Found CPU APIC ID 134 ACPI ID 7: disabled
MADT: Found CPU APIC ID 135 ACPI ID 8: disabled
Copyright (c) 1992-2017 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
The Regents of the University of California. All rights reserved.
FreeBSD is a registered trademark of The FreeBSD Foundation.
FreeBSD 11.1-RELEASE-p6 #2 r313908+cac12d01a89(RELENG_2_4-EVI): Fri Jan 26
23:35:27 UTC 2018
root@builder:/usr/src/kernel/tmp/obj/usr/src/FreeBSD-src/sys/test amd64
FreeBSD clang version 4.0.0 (tags/RELEASE_400/final 297347) (based on LLVM
4.0.0)
Table 'FACP' at 0xdbfb0290
Table 'APIC' at 0xdbfb0390
Table 'SPCR' at 0xdbfb0440
Table 'SLIT' at 0xdbfb0490
Table 'SPMI' at 0xdbfb04c0
Table 'OEMB' at 0xdbfbe040
Table 'SRAT' at 0xdbfb7540
SRAT: Found table at 0xdbfb7540
SRAT: Found CPU APIC ID 0 domain 0: enabled
SRAT: Found CPU APIC ID 1 domain 0: enabled
SRAT: Found memory domain 0 addr 0x0 len 0xa: enabled
SRAT: Found memory domain 0 addr 0x10 len 0xbff0: enabled
SRAT: Found CPU APIC ID 2 domain 1: enabled
SRAT: Found CPU APIC ID 3 domain 1: enabled
SRAT: Found memory domain 1 addr 0xc000 len 0x1c00: enabled
SRAT: Found memory domain 1 addr 0x1 len 0xa400: enabled
Table 'FACP' at 0xdbfb0290
Table 'APIC' at 0xdbfb0390
Table 'SPCR' at 0xdbfb0440
Table 'SLIT' at 0xdbfb0490
SLIT: Found table at 0xdbfb0490
SLIT.Localities: 2
0: 10 10
1: 10 10
PPIM 0: PA=0xa, VA=0x82e1, size=0x1, mode=0
VT(vga): resolution 640x480
Preloaded elf kernel "/boot/kernel.test/kernel" at 0x82cbe000.
Calibrating TSC clock ... TSC clock: 2992117590 Hz
CPU: Dual-Core AMD Opteron(tm) Processor  SE (2992.12-MHz K8-class CPU)
  Origin="AuthenticAMD"  Id=0x40f13  Family=0xf  Model=0x41  Stepping=3
 
Features=0x178bfbff
  Features2=0x2001
  AMD Features=0xea500800
  AMD Features2=0x1f
  SVM: Features=0x0
Revision=1, ASIDs=64
L1 2MB data TLB: 8 entries, fully associative
L1 2MB instruction TLB: 8 entries, fully associative
L1 4KB data TLB: 32 entries, fully associative
L1 4KB instruction TLB: 32 entries, fully associative
L1 data cache: 64 kbytes, 64 bytes/line, 1 lines/tag, 2-way associative
L1 instruction cache: 64 kbytes, 64 bytes/line, 1 lines/tag, 2-way associative
L2 2MB unified TLB: 0 entries, disabled/not present
L2 4KB data TLB: 512 entries, 4-way associative
L2 4KB instruction TLB: 512 entries, 4-way associative
L2 unified cache: 1024 kbytes, 64 bytes/line, 1 lines/tag, 16-way associative
real memory  = 6442450944 (6144 MB)
Physical memory chunk(s):
0x0001 - 0x00097fff, 557056 bytes (136 pages)
0x0010 - 0x001f, 1048576 bytes (256 pages)
0x02d0d000 - 0xd1422fff, 3463536640 bytes (845590 pages)
0xdbfae000 - 0xdbfa, 8192 bytes (2 pages)
0x0001 - 0x0001a3fe7fff, 2751365120 bytes (671720 pages)
avail memory = 6190829568 (5904 MB)
Event timer "LAPIC" quality 100
LAPIC: ipi_wait() us multiplier 72 (r 4115237 tsc 2992117590)
ACPI APIC Table: 
Package ID shift: 1
L2 cache ID shift: 0
L1 cache ID shift: 0
Core ID shift: 0
INTR: Adding local APIC 1 as a target
INTR: Adding local APIC 2 as a target
INTR: Adding local APIC 3 as a target
FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs
FreeBSD/SMP: 2 package(s) x 2 core(s)
Package HW ID = 0 (0)
Core HW ID = 0 (0)
CPU0 (BSP): APIC ID: 0 (0)
Core HW ID = 1 (0x1)
CPU1 (AP): APIC ID: 1 (0x1)
Package HW ID = 1 (0x1)
Core HW ID = 2 (0x2)
CPU2 (AP): APIC ID: 2 (0x2)
Core HW ID = 3 (0x3)
CPU3 (AP): APIC ID: 3 (0x3)
APIC: CPU 0 has ACPI ID 1
APIC: CPU 1 has ACPI ID 2
APIC: CPU 2 has ACPI ID 3
APIC: CPU 3 has ACPI ID 4
SRAT: CPU 0 has memory domain 0
SRAT: CPU 1 has memory domain 0
SRAT: CPU 2 has memory domain 1
SRAT: CPU 3 has memory domain 1
x86bios:  IVT 0x00-0x0004ff at 

[Bug 225450] 11.1-* panics on AMD Opteron 2k due to EARLY_AP_STARTUP

[bugzilla-noreply]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=225450

--- Comment #4 from John Baldwin  ---
Can you get boot -v output?

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[Bug 225450] 11.1-* panics on AMD Opteron 2k due to EARLY_AP_STARTUP

[bugzilla-noreply]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=225450

--- Comment #2 from Pablo Ruiz  ---
I've built a kernel with MAXCPU=2, and funnily enough it boots ok.. it only
launches CPU#1 (along with #0), but it works ok..

This system has two physical CPUs, each with two cores. Dunno if this may be
related.. 

Here is the output:

---
OK boot kernel.test
/boot/kernel.test/kernel text=0x16f1f28 data=0xb66738+0x34cc58
syms=[0x8+0x1898e8+0x8+0x18a675]
Booting...
KDB: debugger backends: ddb
KDB: current backend: ddb
Copyright (c) 1992-2017 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
The Regents of the University of California. All rights reserved.
FreeBSD is a registered trademark of The FreeBSD Foundation.
FreeBSD 11.1-RELEASE-p6 #0 r313908+b1692e611a8(TEST): Fri Jan 26 22:52:47 UTC
2018
   
root@pfsense-builder:/usr/src/kernel/tmp/obj/usr/src/kernel/tmp/FreeBSD-src/sys/test
amd64
FreeBSD clang version 4.0.0 (tags/RELEASE_400/final 297347) (based on LLVM
4.0.0)
VT(vga): resolution 640x480
CPU: Dual-Core AMD Opteron(tm) Processor  SE (2992.11-MHz K8-class CPU)
  Origin="AuthenticAMD"  Id=0x40f13  Family=0xf  Model=0x41  Stepping=3
 
Features=0x178bfbff
  Features2=0x2001
  AMD Features=0xea500800
  AMD Features2=0x1f
  SVM: NAsids=64
real memory  = 6442450944 (6144 MB)
avail memory = 6190903296 (5904 MB)
Event timer "LAPIC" quality 100
ACPI APIC Table: 
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
FreeBSD/SMP: 2 package(s) x 2 core(s)
FreeBSD/SMP Online: 1 package(s) x 2 core(s)
ACPI BIOS Warning (bug): 32/64X length mismatch in FADT/Gpe0Block: 64/32
(20170303/tbfadt-748)
ACPI BIOS Warning (bug): 32/64X length mismatch in FADT/Gpe1Block: 128/64
(20170303/tbfadt-748)
ioapic1: Changing APIC ID to 16
ioapic2: Changing APIC ID to 17
ioapic3  irqs 24-47 on motherboard
ioapic0  irqs 0-23 on motherboard
ioapic1  irqs 48-54 on motherboard
ioapic2  irqs 56-62 on motherboard
SMP: AP CPU #1 Launched!
random: entropy device external interface
wlan: mac acl policy registered
kbd1 at kbdmux0
netmap: loaded module
module_register_init: MOD_LOAD (vesa, 0x81155cc0, 0) error 19
nexus0
vtvga0:  on motherboard
cryptosoft0:  on motherboard
padlock0: No ACE support.
acpi0:  on motherboard
acpi0: Power Button (fixed)
unknown: I/O range not supported
cpu0:  on acpi0
cpu1:  on acpi0
attimer0:  port 0x40-0x43 irq 0 on acpi0
Timecounter "i8254" frequency 1193182 Hz quality 0
Event timer "i8254" frequency 1193182 Hz quality 100
atrtc0:  port 0x70-0x71 irq 8 on acpi0
Event timer "RTC" frequency 32768 Hz quality 0
hpet0:  iomem 0xfed0-0xfed00fff on acpi0
Timecounter "HPET" frequency 2500 Hz quality 950
hpet1:  iomem 0xfed1-0xfed10fff on acpi0
Timecounter "ACPI-safe" frequency 3579545 Hz quality 850
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x2008-0x200b on acpi0
pcib0:  on acpi0
pcib0: _OSC returned error 0x10
pci0:  on pcib0
pci0:  at device 0.0 (no driver attached)
isab0:  at device 1.0 on pci0
isa0:  on isab0
ohci0:  mem 0xfe3ff000-0xfe3f irq 20 at
device 2.0 on pci0
usbus0 on ohci0
usbus0: 12Mbps Full Speed USB v1.0
ehci0:  mem 0xfe3fec00-0xfe3fecff irq
21 at device 2.1 on pci0
usbus1: EHCI version 1.0
usbus1 on ehci0
usbus1: 480Mbps High Speed USB v2.0
atapci0:  port
0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0x9100-0x910f at device 6.0 on pci0
ata0:  at channel 0 on atapci0
ata1:  at channel 1 on atapci0
pcib1:  at device 9.0 on pci0
pci1:  on pcib1
vgapci0:  port 0xa800-0xa8ff mem
0xfc00-0xfcff,0xfdbff000-0xfdbf irq 16 at device 3.0 on pci1
vgapci0: Boot video device
nfe0:  port 0xdc00-0xdc07 mem
0xfe3fd000-0xfe3fdfff irq 22 at device 10.0 on pci0
miibus0:  on nfe0
e1000phy0:  PHY 1 on miibus0
e1000phy0:  none, 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseSX,
1000baseSX-FDX, 1000baseT, 1000baseT-master, 1000baseT-FDX,
1000baseT-FDX-master, auto, auto-flow
nfe0: Using defaults for TSO: 65518/35/2048
nfe0: Ethernet address: 00:14:4f:e5:3a:3c
pcib2:  at device 11.0 on pci0
pci2:  on pcib2
pcib3:  at device 12.0 on pci0
pci3:  on pcib3
pcib4:  at device 13.0 on pci0
pci4:  on pcib4
em0:  port 0xbc00-0xbc1f mem
0xfdde-0xfddf,0xfddc-0xfddd irq 17 at device 0.0 on pci4
em0: Using an MSI interrupt
em0: Ethernet address: 00:15:17:c3:df:7c
em0: netmap queues/slots: TX 1/4096, RX 1/4096
em1:  port 0xb800-0xb81f mem
0xfdd8-0xfdd9,0xfdd6-0xfdd7 irq 16 at device 0.1 on pci4
em1: Using an MSI interrupt
em1: Ethernet address: 00:15:17:c3:df:7d
em1: netmap queues/slots: TX 1/4096, RX 1/4096
pcib5:  at device 14.0 on pci0
pci5:  on pcib5
ix0: 

[Bug 225450] 11.1-* panics on AMD Opteron 2k due to EARLY_AP_STARTUP

[bugzilla-noreply]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=225450

--- Comment #1 from John Baldwin  ---
Can you build a kernel with MAXCPU set to 2?  That will reduce the garbage by
only having 1 AP startup so the panic stack trace is cleaner.

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[Bug 225450] 11.1-* panics on AMD Opteron 2k due to EARLY_AP_STARTUP

[bugzilla-noreply]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=225450

Bug ID: 225450
   Summary: 11.1-* panics on AMD Opteron 2k due to
EARLY_AP_STARTUP
   Product: Base System
   Version: 11.1-STABLE
  Hardware: amd64
OS: Any
Status: New
  Severity: Affects Many People
  Priority: ---
 Component: kern
  Assignee: freebsd-bugs@FreeBSD.org
  Reporter: pablo.r...@gmail.com

The EARLY_AP_STARTUP kernel option causes kernel panics on AMD Opteron 2xxxSE
CPUs. Including SUN X4100, X4200, etc.

Commenting EARLY_AP_STARTUP while building kernel allows boot. Safe mode boot
works too because it disables smp.

An svn bisect was performed for 11-stable and the addition of EARLY_AP_STARTUP 
 at r318763 seems to be the culprit.

This has been reproduced with 11.1-RELEASE, 11.1-RELEASE-p1, 11.1-RELEASE-p2,
11.1-RELEASE-p4 & 11.1-RELEASE-p6. Meanwhile FreeBSD 10 works/boots fine.

Example boot output with failing kernel (includes garbage):

/boot/kernel.old/kernel text=0x14972f8 data=0x1384c0+0x4c15e8 
syms=[0x8+0x15e8b0+0x8+0x178422]
/boot/entropy size=0x1000
Booting...
Copyright (c) 1992-2017 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
The Regents of the University of California. All rights reserved.
FreeBSD is a registered trademark of The FreeBSD Foundation.
FreeBSD 11.1-RELEASE #0 r321309: Fri Jul 21 02:08:28 UTC 2017
r...@releng2.nyi.freebsd.org:/usr/obj/usr/src/sys/GENERIC amd64
FreeBSD clang version 4.0.0 (tags/RELEASE_400/final 297347) (based on LLVM 
4.0.0)
VT(vga): resolution 640x480
CPU: Dual-Core AMD Opteron(tm) Processor 2218 (2593.16-MHz K8-class CPU)
  Origin="AuthenticAMD"  Id=0x40f12  Family=0xf  Model=0x41  Stepping=2

Features=0x178bfbff
  Features2=0x2001
  AMD Features=0xea500800
  AMD Features2=0x1f
  SVM: NAsids=64
real memory  = 4563402752 (4352 MB)
avail memory = 4104478720 (3914 MB)
Event timer "LAPIC" quality 100
ACPI APIC Table: 
FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs
FreeBSD/SMP: 2 package(s) x 2 core(s)
random: unblocking device.
ACPI BIOS Warning (bug): 32/64X length mismatch in FADT/Gpe0Block: 64/32 
(20170303/tbfadt-748)
ACPI BIOS Warning (bug): 32/64X length mismatch in FADT/Gpe1Block: 128/64 
(20170303/tbfadt-748)
ioapic1: Changing APIC ID to 16
ioapic2: Changing APIC ID to 17
ioapic3  irqs 24-47 on motherboard
ioapic0  irqs 0-23 on motherboard
ioapic1  irqs 48-54 on motherboard
ioapic2  irqs 56-62 on motherboard
SMP: AP CPU

SMP: AP CPU
k


F
 aF
aFat



F
 aF
kkernel trap 12 with interrupts disabþÿÿÿÿ�ÿÿÿÿÿÿÿÿkernel trap 
12 with interrupts disabled


Fatal trap 60276736: UNÿÿkernel trap 12 with interrupts disabled


iatal trap -2130508367: UNKNOWN whilpanierc: staeck ovlerflowt detrected; 
backt1race mawy bei corrup ted
 cpuid t= 1
KrDB: stack bupackttrace:
#0 0xs80aada97 at lkdb_backtrace+0x67
x80a6bb76 aFat vpanic+0x1l86
 #r2 0xfpff1f80a6b9e3 at  panipc+0x43g
#3e 0xa80a9b072u at __tstackw_chkh_lfail+0x12
 i#4 0xff kff80eab3f2b eat vprintf+0 x10b
000 atcp dmapbase+0x397c000
Upt =ime: 12s
Au;toma tic rebpoot inc 15 secondsi - press a key on 0the con
 sole fto abort
-u-> Press a key on the iconsroule to reboot ,
-a-> or drswitech off   the =system xnow.
ke¡ÿÿÿÿÿÿÿÿkernel trap 12 with interrupts disabled


Fatal trap 12: page fault while in kernel mode
cð
c

---

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