Messages in this thread | | | Date | Fri, 24 Apr 2009 10:04:37 -0400 (EDT) | From | Steven Rostedt <> | Subject | Re: [PATCH 2/6] tracing: increase size of number of possible events |
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On Fri, 24 Apr 2009, Li Zefan wrote: > > console 1: > # cat /debug/tracing/trace_pipe > > console 2: > while (1) { > insmod trace-events-sample.ko > echo foo_bar > /debug/tracing/set_event > rmmod trace-events-sample.ko > } > > I got this immediately: > > BUG: unable to handle kernel NULL pointer dereference at 0000006f > IP: [<c05210f3>] bstr_printf+0x2ce/0x302 > ... > Call Trace: > [<c0476d12>] ? trace_seq_bprintf+0x28/0x41 > [<c0477569>] ? trace_bprint_print+0x58/0x6c > [<c0472ffc>] ? print_trace_line+0x2c5/0x2df > [<c0428a41>] ? sub_preempt_count+0x85/0xa0 > [<c04758cf>] ? tracing_read_pipe+0x118/0x191 > [<c04757b7>] ? tracing_read_pipe+0x0/0x191 > [<c04b09f9>] ? vfs_read+0x8f/0x136 > [<c04b0da3>] ? sys_read+0x40/0x65 > [<c0402a68>] ? sysenter_do_call+0x12/0x36 > > (We can even get other crashes..) >
Can you send me your full bootlog and config. I'm not able to reproduce this.
-- Steve
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