main [so: 15] on Ryzen 9 7950X3D [so: amd64]: panic: Unknown caching mode 31 [pmap_cache_bits at sys/amd64/amd64/pmap.c:2697]
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Date: Thu, 04 Jan 2024 02:05:02 UTC
I've had a couple of 7950X3D crashes when I've not been around to
observe, not frequent. I was finally had one happen while I was
present. I do not know a way to force a failure on demand.
[Note: I currently only have internet access via a limited use
cell phone for some number of days. So my report is just the
prefix of /var/crash/core.txt.3 .]
The system was not running a debug build. Also, it is my personal
build. For this I'm unlikely to manage to set up a reproduction
via an official build.
# more /var/crash/core.txt.3
7950X3D-ZFS dumped core - see /var/crash/vmcore.3
Wed Jan 3 15:07:58 PST 2024
FreeBSD 7950X3D-ZFS 15.0-CURRENT FreeBSD 15.0-CURRENT #134 main-n266876-e183039f0882-dirty: Fri Dec 8 14:22:35 PST 2023 root@7950X3D-ZFS:/usr/obj/BUILDs/main-amd64-nodbg-clang/usr/main-src/amd64.amd64/sys/GENERIC-NODBG amd64
panic: Unknown caching mode 31
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Reading symbols from /boot/kernel/kernel...
Reading symbols from /usr/lib/debug//boot/kernel/kernel.debug...
Unread portion of the kernel message buffer:
panic: Unknown caching mode 31
cpuid = 8
time = 1704322675
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe04293f39e0
vpanic() at vpanic+0x131/frame 0xfffffe04293f3b10
panic() at panic+0x43/frame 0xfffffe04293f3b70
pmap_enter() at pmap_enter+0x104b/frame 0xfffffe04293f3c40
vm_fault() at vm_fault+0x1340/frame 0xfffffe04293f3d60
vm_fault_trap() at vm_fault_trap+0x6b/frame 0xfffffe04293f3db0
trap_pfault() at trap_pfault+0x1d6/frame 0xfffffe04293f3e10
trap() at trap+0x45d/frame 0xfffffe04293f3f30
calltrap() at calltrap+0x8/frame 0xfffffe04293f3f30
--- trap 0xc, rip = 0x8268267a5, rsp = 0x8279aced8, rbp = 0x8279acf10 ---
KDB: enter: panic
__curthread () at /usr/main-src/sys/amd64/include/pcpu_aux.h:57
57 __asm("movq %%gs:%P1,%0" : "=r" (td) : "n" (offsetof(struct pcpu,
(kgdb) #0 __curthread () at /usr/main-src/sys/amd64/include/pcpu_aux.h:57
td = <optimized out>
#1 doadump (textdump=textdump@entry=0)
at /usr/main-src/sys/kern/kern_shutdown.c:403
error = 0
coredump = <optimized out>
#2 0xffffffff804a476a in db_dump (dummy=<optimized out>, dummy2=<optimized out>, dummy3=<optimized out>, dummy4=<optimized out>)
at /usr/main-src/sys/ddb/db_command.c:590
error = <optimized out>
#3 0xffffffff804a4570 in db_command (last_cmdp=<optimized out>, cmd_table=<optimized out>, dopager=true)
at /usr/main-src/sys/ddb/db_command.c:503
modif = "\000\000\000\000\000\000\000\000$p\033\202\377\377\377\377x\222\227\001\001\370\377\377\000\000\000\000\000\000\000\000\b\000\000\0000\000\000\000\2605?)\004\376\377\377P5?)\004\376\377\377$p\033\202\377\377\377\377\3605?)\004\376\377\377\biJ\200\377\377\377\377\320\302\001\202\377\377\377\377%L'\201\377\377\377\377 p\033\202\377\377\377\377\000\000\000\000\000\000\000\000\320\302\001\202\377\377\377\377"
addr = -2135186029
count = -1
cmd = 0xffffffff8201b768 <db_cmds+616>
have_addr = <optimized out>
t = <optimized out>
result = <optimized out>
#4 0xffffffff804a422d in db_command_loop ()
at /usr/main-src/sys/ddb/db_command.c:550
No locals.
#5 0xffffffff804a7bc6 in db_trap (type=<optimized out>, code=<optimized out>)
at /usr/main-src/sys/ddb/db_main.c:267
jb = {{_jb = {0, -2181151377896, -2181151377760, -2113813808, 0, -2181151377888, -8782373759168, -2142602412, -2181151377792, -2137341649, -2110266400, 3}}}
bkpt = false
watchpt = false
prev_jb = 0x0
why = <optimized out>
#6 0xffffffff80bbaff7 in kdb_trap (type=type@entry=3, code=code@entry=0, tf=tf@entry=0xfffffe04293f3920) at /usr/main-src/sys/kern/subr_kdb.c:790
__pc = <optimized out>
__pc = <optimized out>
other_cpus = {__bits = {5914799713661383268, 0, -2181151377264, 0, -2135156224, -2128969052, -2181151377280, -2135161210, 35024195344, 0, 43641681928, -2128969053, -2128649111, 5, 692009152, -4294967296}}
be = 0xffffffff8201c2d0 <ddb_dbbe>
intr = 70
did_stop_cpus = <optimized out>
handled = <optimized out>
#7 0xffffffff81051cdd in trap (frame=0xfffffe04293f3920)
at /usr/main-src/sys/amd64/amd64/trap.c:606
__pc = <optimized out>
__pc = <optimized out>
__pc = <optimized out>
ksi = {ksi_link = {tqe_next = 0xffffffff804a7d5c <db_printf+92>, tqe_prev = 0xfffffe04293f3858}, ksi_info = {si_signo = 692009128, si_errno = -508, si_code = 0, si_pid = 0, si_uid = 692009112, si_status = -508, si_addr = 0x521597006a5e7264, si_value = {
sival_int = 1016, sival_ptr = 0x3f8, sigval_int = 1016, sigval_ptr = 0x3f8}, _reason = {_fault = {_trapno = 692010816}, _timer = {_timerid = 692010816, _overrun = -508}, _mesgq = {
_mqd = 692010816}, _poll = {_band = -2181151375552}, _capsicum = {_syscall = 692010816}, __spare__ = {
__spare1__ = -2181151375552, __spare2__ = {664456920, 8, 1784574564, 1377146624, 256, 0, -1}}}}, ksi_flags = -866898064, ksi_sigq = 0xffffffff8126824c}
signo = 692009312
ucode = -508
td = <optimized out>
p = 0xfffffe041d0cfae0
dr6 = 0
type = 3
addr = <optimized out>
pf = <optimized out>
i = <optimized out>
#8 <signal handler called>
No locals.
#9 kdb_enter (why=<optimized out>, msg=<optimized out>)
at /usr/main-src/sys/kern/subr_kdb.c:556
No locals.
#10 0xffffffff80b6b582 in vpanic (
fmt=0xffffffff8126824c "Unknown caching mode %d\n", ap=ap@entry=0xfffffe04293f3b50)
at /usr/main-src/sys/kern/kern_shutdown.c:953
buf = "Unknown caching mode 31\n", '\000' <repeats 231 times>
__pc = <optimized out>
__pc = <optimized out>
__pc = <optimized out>
other_cpus = {__bits = {4294967039, 0 <repeats 15 times>}}
td = 0xfffff80331bb5740
bootopt = <optimized out>
newpanic = <optimized out>
#11 0xffffffff80b6b413 in panic (
fmt=0xffffffff820aa2a8 <vt_conswindow+16> "3\370 \201\377\377\377\377")
at /usr/main-src/sys/kern/kern_shutdown.c:889
ap = {{gp_offset = 16, fp_offset = 48, overflow_arg_area = 0xfffffe04293f3b80, reg_save_area = 0xfffffe04293f3b20}}
#12 0xffffffff8103d8db in pmap_cache_bits (pmap=0xfffff80389ca8ad0, mode=64, is_pde=<optimized out>) at /usr/main-src/sys/amd64/amd64/pmap.c:2697
pat_idx = <optimized out>
cache_bits = <optimized out>
pat_flag = <optimized out>
#13 pmap_enter (pmap=0xfffff80389ca8ad0, va=<optimized out>, va@entry=8189072760832, m=0xfffffe00cc5c2fb0, prot=<optimized out>, flags=2, psind=psind@entry=0 '\000')
at /usr/main-src/sys/amd64/amd64/pmap.c:7196
lock = 0x0
PG_A = <optimized out>
PG_G = <optimized out>
PG_M = <optimized out>
PG_V = <optimized out>
PG_RW = 0
pa = 18446741878114365296
newpte = <optimized out>
rv = <optimized out>
mpte = <optimized out>
pde = <optimized out>
nosleep = <optimized out>
pte = <optimized out>
origpte = <optimized out>
pv = <optimized out>
opa = <optimized out>
om = <optimized out>
#14 0xffffffff80ef3d80 in vm_fault (map=map@entry=0xfffff80389ca89a0,
vaddr=vaddr@entry=8189072760832, fault_type=fault_type@entry=2 '\002', fault_flags=fault_flags@entry=0, m_hold=m_hold@entry=0x0)
at /usr/main-src/sys/vm/vm_fault.c:1756
ahead = 692010240
behind = -1
fs = <optimized out>
faultcount = 1
hardfault = false
rv = <optimized out>
res = <optimized out>
res_next = <optimized out>
#15 0xffffffff80ef292b in vm_fault_trap (map=0xfffff80389ca89a0, vaddr=vaddr@entry=8189072760832, fault_type=<optimized out>, fault_flags=fault_flags@entry=0, signo=0xfffffe04293f3f00, ucode=0xfffffe04293f3f04) at /usr/main-src/sys/vm/vm_fault.c:710
result = <optimized out>
#16 0xffffffff81052956 in trap_pfault (frame=frame@entry=0xfffffe04293f3f40, usermode=true, signo=0x0, signo@entry=0xfffffe04293f3f00, ucode=0xfffffe04293f3620, ucode@entry=0xfffffe04293f3f04)
at /usr/main-src/sys/amd64/amd64/trap.c:843
__pc = <optimized out>
__pc = <optimized out>
__pc = <optimized out>
td = 0xfffff80331bb5740
p = <optimized out>
eva = 8189072760832
map = 0xffffffff820aa2a8 <vt_conswindow+16>
ftype = 18 '\022'
rv = <optimized out>
#17 0xffffffff81051eed in trap (frame=0xfffffe04293f3f40)
at /usr/main-src/sys/amd64/amd64/trap.c:382
__pc = <optimized out>
__pc = <optimized out>
__pc = <optimized out>
ksi = {ksi_link = {tqe_next = 0xfffff80331bb5740, tqe_prev = 0x69d4aff}, ksi_info = {si_signo = 1, si_errno = 0, si_code = 0, si_pid = 0, si_uid = 2812281728, si_status = 1906, si_addr = 0xfffffe04293f3e70, si_value = {
sival_int = -2129519781, sival_ptr = 0xffffffff81121b5b <lapic_handle_timer+171>, sigval_int = -2129519781, sigval_ptr = 0xffffffff81121b5b <lapic_handle_timer+171>}, _reason = {_fault = {_trapno = 664456992}, _timer = {
_timerid = 664456992, _overrun = 8}, _mesgq = {
_mqd = 664456992}, _poll = {_band = 35024195360}, _capsicum = {_syscall = 664456992}, __spare__ = {
__spare1__ = 35024195360, __spare2__ = {12330184, 0, 664456976, 8, -2130533455, -1, -1446252544}}}}, ksi_flags = 0, ksi_sigq = 0x34ea5840}
signo = 0
ucode = 0
td = 0xfffff80331bb5740
p = 0xfffffe041d0cfae0
dr6 = 0
type = 12
addr = 35005818789
pf = <optimized out>
i = <optimized out>
#18 <signal handler called>
No locals.
#19 0x00000008268267a5 in ?? ()
No symbol table info available.
Backtrace stopped: Cannot access memory at address 0x8279aced8
(kgdb)
. . .
FYI:
/*
* Determine the appropriate bits to set in a PTE or PDE for a specified
* caching mode.
*/
int
pmap_cache_bits(pmap_t pmap, int mode, boolean_t is_pde)
{
int cache_bits, pat_flag, pat_idx;
if (!pmap_is_valid_memattr(pmap, mode))
panic("Unknown caching mode %d\n", mode);
That is all for now.
===
Mark Millard
marklmi at yahoo.com