... SMP: AP CPU #3 Launched! cpu3 AP: ID: 0x00000003 VER: 0x01060015 LDR: 0x00000008 DFR: 0x00000000 x2APIC: 1 lint0: 0x00010700 lint1: 0x00000400 TPR: 0x00000000 SVR: 0x000011ff timer: 0x000100ef therm: 0x00010000 err: 0x000000f0 pmc: 0x00010400 cmci: 0x000100f2 SMP: AP CPU #6 Launched! cpu6 AP: ID: 0x00000006 VER: 0x01060015 LDR: 0x00000040 DFR: 0x00000000 x2APIC: 1 lint0: 0x00010700 lint1: 0x00000400 TPR: 0x00000000 SVR: 0x000011ff timer: 0x000100ef therm: 0x00010000 err: 0x000000f0 pmc: 0x00010400 cmci: 0x000100f2 panic: sched_pickcpu: Failed to find a cpu. cpuid = 0 time = 1 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xffffffff82550830 vpanic() at vpanic+0x19d/frame 0xffffffff82550880 panic() at panic+0x43/frame 0xffffffff825508e0 sched_pickcpu() at sched_pickcpu+0x4c1/frame 0xffffffff82550990 sched_add() at sched_add+0x6e/frame 0xffffffff825509d0 gtaskqueue_start_threads() at gtaskqueue_start_threads+0x124/frame 0xffffffff82550a70 taskqgroup_cpu_create() at taskqgroup_cpu_create+0x135/frame 0xffffffff82550ab0 taskqgroup_adjust() at taskqgroup_adjust+0x1ad/frame 0xffffffff82550b20 mi_startup() at mi_startup+0x210/frame 0xffffffff82550b70 btext() at btext+0x2c KDB: enter: panic [ thread pid 0 tid 100000 ] Stopped at kdb_enter+0x3b: movq $0,kdb_why db> This is an Intel amd64 on a 4-core, 2 threads/core machine; I note that src/sys/kern/sched_ule.c was modified in this update: ------------------------------------------------------------------------ r352658 | mav | 2019-09-24 13:01:20 -0700 (Tue, 24 Sep 2019) | 24 lines Fix/improve interrupt threads scheduling. .... A copy of "dmesg.boot" from a verbose boot from yesterday for the machine may be found at http://www.catwhisker.org/~david/FreeBSD/history/freebeast.13_dmesg.txt I'm about to find out if my laptop (which shares the above salient characteristics, and is being updated in parallel) exhibits similar symptoms. Peace, david -- David H. Wolfskill david_at_catwhisker.org "I am the Chosen One!" -- Donald Trump [Cf. Mt 24:23-24; Mk 13:21-23; Jn 5:31] See http://www.catwhisker.org/~david/publickey.gpg for my public key.
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