Date: Tue, 31 Aug 2021 19:11:33 -0700 From: Craig Leres <leres@freebsd.org> To: Warner Losh <imp@bsdimp.com> Cc: FreeBSD Hackers <freebsd-hackers@freebsd.org> Subject: Re: Patched gpsd and /dev/pps0 results in "sleeping thread" kernel panic Message-ID: <5476ea21-9e8a-32f5-08ff-add46c02d910@freebsd.org> In-Reply-To: <CANCZdfos2NamQXXcjYyVAcJvUL21kQbjUR4KRTp1xXKsQN3SrA@mail.gmail.com> References: <dc4c4948-738e-c530-d96f-ade5cce5d3d2@freebsd.org> <CANCZdfos2NamQXXcjYyVAcJvUL21kQbjUR4KRTp1xXKsQN3SrA@mail.gmail.com>
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On 8/31/21 6:54 PM, Warner Losh wrote: > Can you post a traceback? We recently tightened up the sleeping conditions > and many of the panics are straight forward to fix Is this sufficient? Craig toc2 4 # kgdb /boot/kernel/kernel /var/crash/vmcore.1 GNU gdb (GDB) 10.2 [GDB v10.2 for FreeBSD] Copyright (C) 2021 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>; This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-portbld-freebsd12.2". Type "show configuration" for configuration details. For bug reporting instructions, please see: <https://www.gnu.org/software/gdb/bugs/>. Find the GDB manual and other documentation resources online at: <http://www.gnu.org/software/gdb/documentation/>. For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from /boot/kernel/kernel... Reading symbols from /boot/kernel.LBLNET/kernel.debug... Unread portion of the kernel message buffer: Sleeping thread (tid 101408, pid 2046) owns a non-sleepable lock KDB: stack backtrace of thread 101408: sched_switch() at sched_switch+0x630/frame 0xfffffe0070e4f760 mi_switch() at mi_switch+0xd4/frame 0xfffffe0070e4f790 sleepq_catch_signals() at sleepq_catch_signals+0x403/frame 0xfffffe0070e4f7e0 sleepq_timedwait_sig() at sleepq_timedwait_sig+0x14/frame 0xfffffe0070e4f820 _sleep() at _sleep+0x1b3/frame 0xfffffe0070e4f8a0 pps_ioctl() at pps_ioctl+0x298/frame 0xfffffe0070e4f8f0 ppsioctl() at ppsioctl+0x48/frame 0xfffffe0070e4f920 devfs_ioctl() at devfs_ioctl+0xb0/frame 0xfffffe0070e4f970 VOP_IOCTL_APV() at VOP_IOCTL_APV+0x7b/frame 0xfffffe0070e4f9a0 vn_ioctl() at vn_ioctl+0x16a/frame 0xfffffe0070e4fab0 devfs_ioctl_f() at devfs_ioctl_f+0x1e/frame 0xfffffe0070e4fad0 kern_ioctl() at kern_ioctl+0x2b7/frame 0xfffffe0070e4fb30 sys_ioctl() at sys_ioctl+0xfa/frame 0xfffffe0070e4fc00 amd64_syscall() at amd64_syscall+0x387/frame 0xfffffe0070e4fd30 fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe0070e4fd30 --- syscall (54, FreeBSD ELF64, sys_ioctl), rip = 0x8004c899a, rsp = 0x7fffdfdfc6a8, rbp = 0x7fffdfdfc730 --- panic: sleeping thread cpuid = 8 time = 1630456142 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe005ab73ab0 vpanic() at vpanic+0x17b/frame 0xfffffe005ab73b00 panic() at panic+0x43/frame 0xfffffe005ab73b60 propagate_priority() at propagate_priority+0x282/frame 0xfffffe005ab73b90 turnstile_wait() at turnstile_wait+0x30c/frame 0xfffffe005ab73be0 __mtx_lock_sleep() at __mtx_lock_sleep+0x199/frame 0xfffffe005ab73c70 ppcintr() at ppcintr+0x2a0/frame 0xfffffe005ab73c90 ithread_loop() at ithread_loop+0x23c/frame 0xfffffe005ab73cf0 fork_exit() at fork_exit+0x7e/frame 0xfffffe005ab73d30 fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe005ab73d30 --- trap 0, rip = 0, rsp = 0, rbp = 0 --- Uptime: 17m20s Dumping 607 out of 12240 MB:..3%..11%..22%..32%..43%..51%..61%..72%..82%..93% __curthread () at /usr/src/sys/amd64/include/pcpu_aux.h:55 55 /usr/src/sys/amd64/include/pcpu_aux.h: No such file or directory. (kgdb) bt #0 __curthread () at /usr/src/sys/amd64/include/pcpu_aux.h:55 #1 doadump (textdump=1) at ../../../kern/kern_shutdown.c:371 #2 0xffffffff80b83ada in kern_reboot (howto=260) at ../../../kern/kern_shutdown.c:451 #3 0xffffffff80b83f33 in vpanic (fmt=<optimized out>, ap=<optimized out>) at ../../../kern/kern_shutdown.c:880 #4 0xffffffff80b83d53 in panic (fmt=<unavailable>) at ../../../kern/kern_shutdown.c:807 #5 0xffffffff80be7152 in propagate_priority (td=0xfffff80196959740) at ../../../kern/subr_turnstile.c:228 #6 0xffffffff80be7d1c in turnstile_wait (ts=0xfffff8000357a780, owner=<optimized out>, queue=0) at ../../../kern/subr_turnstile.c:785 #7 0xffffffff80b62ca9 in __mtx_lock_sleep (c=0xfffff80003969bd0, v=<optimized out>) at ../../../kern/kern_mutex.c:654 #8 0xffffffff8086fcc0 in ppcintr (arg=0xfffff80003969b00) at ../../../dev/ppc/ppc.c:1546 #9 0xffffffff80b4637c in intr_event_execute_handlers (p=<optimized out>, ie=0xfffff800030d9d00) at ../../../kern/kern_intr.c:1143 #10 ithread_execute_handlers (p=<optimized out>, ie=0xfffff800030d9d00) at ../../../kern/kern_intr.c:1156 #11 ithread_loop (arg=0xfffff800039aa7e0) at ../../../kern/kern_intr.c:1236 #12 0xffffffff80b42e1e in fork_exit ( callout=0xffffffff80b46140 <ithread_loop>, arg=0xfffff800039aa7e0, frame=0xfffffe005ab73d40) at ../../../kern/kern_fork.c:1080 #13 <signal handler called> (kgdb)
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