[Bug 258649] [ULE] Panic in sched_ule.c:2150

From: <bugzilla-noreply_at_freebsd.org>
Date: Tue, 21 Sep 2021 00:47:31 UTC 
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=258649

            Bug ID: 258649
           Summary: [ULE] Panic in sched_ule.c:2150
           Product: Base System
           Version: 13.0-STABLE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: iron.udjin@gmail.com

OS: stable/13-n247320-f941f0a06298

Reading symbols from /boot/kernel/kernel...
Reading symbols from /usr/lib/debug//boot/kernel/kernel.debug...
sched_switch (td=td@entry=0xffffffff80eb4320 <thread0_st>, flags=<optimized
out>, flags@entry=260) at /usr/src/sys/kern/sched_ule.c:2150
2150                    cpuid = td->td_oncpu = PCPU_GET(cpuid);
(kgdb) bt
#0  sched_switch (td=td@entry=0xffffffff80eb4320 <thread0_st>, flags=<optimized
out>, flags@entry=260) at /usr/src/sys/kern/sched_ule.c:2150
#1  0xffffffff8066f978 in mi_switch (flags=flags@entry=260) at
/usr/src/sys/kern/kern_synch.c:542
#2  0xffffffff806b7b87 in sleepq_switch (wchan=wchan@entry=0xffffffff80eb3de8
<proc0>, pri=pri@entry=84) at /usr/src/sys/kern/subr_sleepqueue.c:608
#3  0xffffffff806b809f in sleepq_timedwait (wchan=<unavailable>,
pri=<unavailable>) at /usr/src/sys/kern/subr_sleepqueue.c:690
#4  0xffffffff8066f145 in _sleep (ident=0xffffffff80eb3de8 <proc0>,
lock=<optimized out>, lock@entry=0x0, priority=priority@entry=84,
wmesg=0xffffffff809aea29 "swapin", sbt=42949670000, pr=<optimized out>,
pr@entry=0, flags=256) at /usr/src/sys/kern/kern_synch.c:219
#5  0xffffffff80897149 in swapper () at /usr/src/sys/vm/vm_swapout.c:752
#6  0xffffffff802c0122 in btext () at /usr/src/sys/amd64/amd64/locore.S:80
(kgdb)

I don't know how to reproduce this bug. I didn't work on the PC when the panic
occur.

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