On Mon, Jan 23, 2012 at 08:24:10PM +0400, Gleb Smirnoff wrote: T> On Mon, Jan 23, 2012 at 04:01:20PM +0200, Andriy Gapon wrote: T> A> > A> Can you try to change printfs in witness to db_printfs? Perhaps this will allow T> A> > A> to get the details of the LOR in uart_cnputc. Maybe that will reveal some T> A> > A> important additional details. T> A> > T> A> > Should I do s/printf/db_printf/ throughout entire subr_witness.c, or only T> A> > in special places? T> A> T> A> I think that "replace all" should work for this test. T> T> Yes, s/ printf/ db_printf/ in subr_witness.c fixes my problem. Sorry. I was testing wrong kernel. The substitute doesn't help. Panic trace is almost the same: db> bt Tracing pid 1 tid 100001 td 0xfffffe0001d5e000 kdb_enter() at kdb_enter+0x3b panic() at panic+0x1c7 _mtx_lock_spin_flags() at _mtx_lock_spin_flags+0x10f cnputs() at cnputs+0x7a vprintf() at vprintf+0xcb printf() at printf+0x67 db_putc() at db_putc+0x81 kvprintf() at kvprintf+0x83 db_printf() at db_printf+0x86 witness_checkorder() at witness_checkorder+0x773 _mtx_lock_spin_flags() at _mtx_lock_spin_flags+0x99 uart_cnputc() at uart_cnputc+0x3e cnputc() at cnputc+0x4c cnputs() at cnputs+0x26 putchar() at putchar+0x11f kvprintf() at kvprintf+0x83 vprintf() at vprintf+0x85 printf() at printf+0x67 cpu_reset() at cpu_reset+0x81 kern_reboot() at kern_reboot+0x3a5 sys_reboot() at sys_reboot+0x42 amd64_syscall() at amd64_syscall+0x39e Xfast_syscall() at Xfast_syscall+0xf7 --- syscall (55, FreeBSD ELF64, sys_reboot), rip = 0x40ea3c, rsp = 0x7fffffffd6d8, rbp = 0x49 --- db> -- Totus tuus, Glebius.Received on Mon Jan 23 2012 - 15:26:07 UTC
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