Hi, I try to run kernel 2.6.22.1 plus -rt8 on my PowerPC MPC5200C based system. The kernel comes up, userspace comes up, and I can log in via serial console. *After* login, it see bash's prompt. But then when I press any key I get the following output (every time): [...] phyCORE-MPC5200B-tiny login: root root@phyCORE-MPC5200B-tiny:~ ------------[ cut here ]------------ kernel BUG at kernel/rtmutex.c:682! stopped custom tracer. Oops: Exception in kernel mode, sig: 5 [#1] PREEMPT pcm030 Modules linked in: mpc52xx_can mscan can_raw can eeprom rtc_pcf8563 rtc_core rtc_lib NIP: c01bdbe4 LR: c01bdb98 CTR: c0118260 REGS: c0245d00 TRAP: 0700 Not tainted (2.6.22.1-rt8) MSR: 00021032 <ME,IR,DR> CR: 22004042 XER: 20000000 TASK = c3fa9660[93] 'IRQ-131' THREAD: c0244000 GPR00: 00000001 c0245db0 c3fa9660 00000000 c3f22800 c3cf8521 00000001 00000005 GPR08: c3fa9660 00000000 c028b498 c3fa9660 22004042 ffffbfff 03fbe000 ffffffff GPR16: 00000001 00000000 007ffc00 00000000 c027a000 c025e09c c0260000 c0210000 GPR24: c0210000 00000000 c3cf8421 00000000 c028b488 c3f22800 c0244000 00009032 NIP [c01bdbe4] rt_spin_lock_slowlock+0x98/0x224 LR [c01bdb98] rt_spin_lock_slowlock+0x4c/0x224 Call Trace: [c0245db0] [c01bdb98] rt_spin_lock_slowlock+0x4c/0x224 (unreliable) [c0245e10] [c011823c] uart_start+0x24/0x48 [c0245e30] [c0113ff4] n_tty_receive_buf+0x170/0xfd4 [c0245ef0] [c010f0dc] flush_to_ldisc+0xe0/0x130 [c0245f20] [c011b51c] mpc52xx_uart_int+0x194/0x350 [c0245f50] [c0046dfc] handle_IRQ_event+0x6c/0x110 [c0245f80] [c00475ec] thread_simple_irq+0x90/0xf8 [c0245fa0] [c00479a0] do_irqd+0x34c/0x3cc [c0245fd0] [c0033380] kthread+0x48/0x84 [c0245ff0] [c00104ac] kernel_thread+0x44/0x60 Instruction dump: 70090008 40820144 80010064 bb410048 38210060 7c0803a6 4e800020 801c0010 5400003a 7c001278 7c000034 5400d97e <0f000000> 39600004 91610008 80010008 note: IRQ-131[93] exited with preempt_count 1 The system runs glibc 2.5 and busybox shell. Any idea? Same behavior with -rt4. But command line works with a plain vanilla 2.6.22.1 kernel. BTW: Working with the shell via telnet is possible without such an error message. Juergen - To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
