[Bug 267225] Panic in pcpu

From: <bugzilla-noreply_at_freebsd.org>
Date: Thu, 20 Oct 2022 11:02:36 UTC 
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=267225

            Bug ID: 267225
           Summary: Panic in pcpu
           Product: Base System
           Version: 13.1-STABLE
          Hardware: riscv
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: mengzhuo1203@gmail.com

Panic with unknown reason.
kgdb
#0  get_pcpu () at /usr/src/sys/riscv/include/pcpu.h:63
#1  sched_switch (td=0xffffffc0009976e0 <thread0_st>, flags=<optimized out>) at
/usr/src/sys/kern/sched_ule.c:2245
#2  0xffffffc000359934 in mi_switch (flags=260) at
/usr/src/sys/kern/kern_synch.c:544
#3  0xffffffc0003a27e6 in sleepq_switch (wchan=<optimized out>, pri=<optimized
out>) at /usr/src/sys/kern/subr_sleepqueue.c:608
#4  0xffffffc0003a2e82 in sleepq_timedwait (wchan=<unavailable>,
pri=<unavailable>) at /usr/src/sys/kern/subr_sleepqueue.c:690
#5  0xffffffc000358f38 in _sleep (ident=0xffffffc0009971a0 <proc0>, lock=0x0,
priority=84, wmesg=0xffffffc000669a35 "swapin", sbt=42949670000, pr=0,
flags=256) at /usr/src/sys/kern/kern_synch.c:220
#6  0xffffffc0005c13b4 in swapper () at /usr/src/sys/vm/vm_swapout.c:755
#7  0xffffffc0002de920 in mi_startup () at /usr/src/sys/kern/init_main.c:344
#8  0xffffffc0000001be in va () at /usr/src/sys/riscv/riscv/locore.S:261

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