Since a few days, I'm experiencing repeated panics in mutex_vector_enter.
Nothing was changed to the server in question, probably, it's experiencing more
load/forks than before. The machine is still on 6.1, but I can't tell whether
the problem is version specific.
The tracebacks look similar (third and fourth coulumn in "show reg" output are
from subsequend panics, missing values mean same as first one):
uvm_fault(0xffffffff8076d460, 0x0, 1) -> e
fatal page fault in supervisor mode
trap type 6 code 0 rip ffffffff8027663b cs 8 rflags 10286 cr2 8 cpl 0 rsp
fffffe811d83bbc0
kernel: page fault trap, code=0
Stopped in pid 0.67 (system) at netbsd:mutex_vector_enter+0x32c: movq
1
8(%rdx),%rax
db{5}> bt
mutex_vector_enter() at netbsd:mutex_vector_enter+0x32c
unp_thread() at netbsd:unp_thread+0x2eb
db{5}> show reg
ds 64Y ?
es d2a0 6405 ?
fs 269d 563 563
gs 0
rdi fffffe834689f040 fffffe83471f1700 fffffe83481f1700
rsi 1000
rbp fffffe811d83bc20 fffffe811d811c20 fffffe811d811c20
rbx fffffe834689f040 fffffe83481f1700 fffffe83481f1700
rdx fffffffffffffff0
rcx fffffffffffffff0
rax fffffe811d7ed2a0
r8 fffffe811d7ed2a0
r9 0
r10 0
r11 2 1 1
r12 0
r13 0
r14 fffffe811d7ed2a0
r15 0
rip fffffff8027663b mutex_vector_enter+0x32c
cs 8
rflags 10286
rsp fffffe811d83bbc0 fffffe811d811bc0 fffffe811d811bc0
ss 0
netbsd:mutex_vector_enter+0x32c: movq 18(%rdx),%rax
db{5}> reboot 4
The machine than hangs hard, I need to press reset.
