(kgdb) proc 1243
[Switching to thread 101 (Thread 100094)]#0  sched_switch (
    td=0xffffff0004fff3c0, newtd=0xffffff00024fc780, flags=Variable "flags" is not available.
)
    at /usr/src/sys/kern/sched_ule.c:1850
1850                    cpuid = PCPU_GET(cpuid);
(kgdb) bt
#0  sched_switch (td=0xffffff0004fff3c0, newtd=0xffffff00024fc780, flags=Variable "flags" is not available.
)
    at /usr/src/sys/kern/sched_ule.c:1850
#1  0xffffffff805b377d in mi_switch (flags=260, newtd=0x0)
    at /usr/src/sys/kern/kern_synch.c:449
#2  0xffffffff805e9073 in sleepq_switch (wchan=0xffffff8000bf59a1, pri=80)
    at /usr/src/sys/kern/subr_sleepqueue.c:530
#3  0xffffffff805e9c5d in sleepq_wait (wchan=0xffffff8000bf59a1, pri=80)
    at /usr/src/sys/kern/subr_sleepqueue.c:609
#4  0xffffffff805b3d97 in _sleep (ident=Variable "ident" is not available.
) at /usr/src/sys/kern/kern_synch.c:234
#5  0xffffff8000ac6b50 in afs_osi_Sleep (event=0xffffff8000bf59a1)
    at /usr/ports/net/openafs-devel/work/openafs/src/afs/FBSD/osi_sleep.c:142
#6  0xffffff8000a79d7c in Afs_Lock_Obtain (lock=0xffffff8000bf59a0, how=2)
    at /usr/ports/net/openafs-devel/work/openafs/src/afs/afs_lock.c:149
#7  0xffffff8000a6b272 in afs_Daemon ()
    at /usr/ports/net/openafs-devel/work/openafs/src/afs/afs_daemons.c:199
#8  0xffffff8000aca3fb in afs_syscall_call (parm=Variable "parm" is not available.
)
    at /usr/ports/net/openafs-devel/work/openafs/src/afs/afs_call.c:640
#9  0xffffff8000a854bd in afs3_syscall (p=0xffffff0004fff3c0, args=Variable "args" is not available.
)
    at /usr/ports/net/openafs-devel/work/openafs/src/afs/afs_syscall.c:699
#10 0xffffffff808a81c2 in syscall (frame=0xffffff8078099c80)
    at /usr/src/sys/amd64/amd64/trap.c:946
#11 0xffffffff8088d791 in Xfast_syscall ()