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Message-ID: <51A5913A.5030302@gmail.com> Date: Wed, 29 May 2013 13:25:14 +0800 From: jgq516@...il.com To: linux-kernel@...r.kernel.org CC: linux-arm-kernel@...ts.infradead.org Subject: ftrace calltrace when boot through kexec Hello, When I reboot a preempt_rt 3.4 kernel with cortex a15 tc2 board thru kexec, I got below calltrace appeared: ------------[ cut here ]------------ WARNING: at kernel/trace/ftrace.c:1584 ftrace_bug+0x1e0/0x224() Modules linked in: [<c0017e14>] (unwind_backtrace+0x0/0x104) from [<c062a468>] (dump_stack+0x20/0x24) [<c062a468>] (dump_stack+0x20/0x24) from [<c00265a4>] (warn_slowpath_common+0x64/0x74) [<c00265a4>] (warn_slowpath_common+0x64/0x74) from [<c00265e0>] (warn_slowpath_null+0x2c/0x34) [<c00265e0>] (warn_slowpath_null+0x2c/0x34) from [<c00bf70c>] (ftrace_bug+0x1e0/0x224) [<c00bf70c>] (ftrace_bug+0x1e0/0x224) from [<c00c03b4>] (ftrace_process_locs+0x880/0x930) [<c00c03b4>] (ftrace_process_locs+0x880/0x930) from [<c082d018>] (ftrace_init+0xb4/0x194) [<c082d018>] (ftrace_init+0xb4/0x194) from [<c081e8c4>] (start_kernel+0x338/0x348) [<c081e8c4>] (start_kernel+0x338/0x348) from [<80008054>] (0x80008054) ---[ end trace af5b256dd27bb7ab ]--- ftrace failed to modify [<c0022b88>] platform_cpu_kill+0x10/0x1c actual: 00:40:bd:e8 Add notrace before platform_cpu_kill can workaround this calltrace, but it is weird that this problem can't reproduce in another cortex-a9 (xilinx-zynq) board, could someone give some hints about this? Thanks. Regards, Xiao -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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