continuation of calcru: runtime went backwards and hang on 5.4-STABLE

[Jason]

so my system was running for about 1.5 days now and now there is no sign of the 
Aug 22 17:20:18 monsterjam kernel: calcru: runtime went backwards from 17036511 usec to 16590577 
usec for pid 71 (schedcpu)
message..

but it appears to have dumped into the debugger today for no apparent reason.


here is a trace..

db> AT S7=45 S0=0 L1 V1 X4 &c1 E1 Q0
No such command
db>
db> trace
Tracing pid 12 tid 100004 td 0xc2284600
kdb_enter(c0807c53) at kdb_enter+0x2b
siointr1(c2438800,c08ee3c0,0,c0807a1b,6ad) at siointr1+0xce
siointr(c2438800) at siointr+0x21
intr_execute_handlers(c2278c90,e3392cb4,4,e3392cf8,c07754a3) at intr_execute_handlers+0x9d
lapic_handle_intr(34) at lapic_handle_intr+0x2e
Xapic_isr1() at Xapic_isr1+0x33
--- interrupt, eip = 0xc077c87d, esp = 0xe3392cf8, ebp = 0xe3392cf8 ---
cpu_idle_default(e3392d0c,c05ed9c5,c2283a98,e3392d24,c05ed78c) at cpu_idle_default+0x5
cpu_idle(c2283a98,e3392d24,c05ed78c,0,e3392d38) at cpu_idle+0x28
idle_proc(0,e3392d38,0,c05ed968,0) at idle_proc+0x5d
fork_exit(c05ed968,0,e3392d38) at fork_exit+0xa4
fork_trampoline() at fork_trampoline+0x8
--- trap 0x1, eip = 0, esp = 0xe3392d6c, ebp = 0 ---
db>

and i did "continue"
and now its seeming to be running ok.

please advise.

Jason