linux-kernel - Re: [PATCH 0/2] ftrace: updates for linux-tip

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Date:	Tue, 11 Nov 2008 10:02:59 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 0/2] ftrace: updates for linux-tip


-tip testing found this new ftrace self-test failure on a 64-bit 
testbox:

[    4.381253] calling  init_wakeup_tracer+0x0/0x12 @ 1
[    4.386298] Testing tracer wakeup: <4>------------[ cut here ]------------
[    4.599754] WARNING: at kernel/trace/ring_buffer.c:1655 rb_advance_reader+0x2b/0xa3()
[    4.600014] Pid: 1, comm: swapper Not tainted 2.6.28-rc4-tip #51129
[    4.600014] Call Trace:
[    4.600014]  [<ffffffff8023beb7>] warn_on_slowpath+0x58/0x75
[    4.600014]  [<ffffffff8025d596>] ? trace_hardirqs_off+0xd/0xf
[    4.600014]  [<ffffffff8025e499>] ? mark_lock+0x1c/0x361
[    4.600014]  [<ffffffff8025d596>] ? trace_hardirqs_off+0xd/0xf
[    4.600014]  [<ffffffff8027ba07>] ? rb_get_reader_page+0x13f/0x159
[    4.600014]  [<ffffffff8025d596>] ? trace_hardirqs_off+0xd/0xf
[    4.600014]  [<ffffffff802818cb>] ? time_hardirqs_off+0x21/0x26
[    4.600014]  [<ffffffff8027ba07>] ? rb_get_reader_page+0x13f/0x159
[    4.600014]  [<ffffffff8025d596>] ? trace_hardirqs_off+0xd/0xf
[    4.600014]  [<ffffffff8027ba07>] ? rb_get_reader_page+0x13f/0x159
[    4.600014]  [<ffffffff8027ba4c>] rb_advance_reader+0x2b/0xa3
[    4.600014]  [<ffffffff8027bb76>] ring_buffer_peek+0xb2/0xdf
[    4.600014]  [<ffffffff8027c758>] ring_buffer_consume+0x24/0x4e
[    4.600014]  [<ffffffff8027da3e>] trace_test_buffer+0x8f/0xcb
[    4.600014]  [<ffffffff80280ae2>] trace_selftest_startup_wakeup+0xa8/0x113
[    4.600014]  [<ffffffff80c6bdf0>] ? wait_for_common+0xcd/0x12d
[    4.600014]  [<ffffffff8027fd4d>] register_tracer+0xe0/0x183
[    4.600014]  [<ffffffff80252bec>] ? timespec_to_ktime+0x1a/0x1c
[    4.600014]  [<ffffffff813985e4>] ? init_wakeup_tracer+0x0/0x12
[    4.600014]  [<ffffffff813985f4>] init_wakeup_tracer+0x10/0x12
[    4.600014]  [<ffffffff8020905d>] do_one_initcall+0x5d/0x13d
[    4.600014]  [<ffffffff80c6e07b>] ? _spin_unlock+0x2b/0x2f
[    4.600014]  [<ffffffff802f642e>] ? proc_register+0x184/0x199
[    4.600014]  [<ffffffff802f6561>] ? create_proc_entry+0x79/0x8f
[    4.600014]  [<ffffffff80277100>] ? register_irq_proc+0x12/0xcf
[    4.600014]  [<ffffffff802f0000>] ? sys_quotactl+0x56e/0x5ad
[    4.600014]  [<ffffffff8137f8f8>] kernel_init+0x127/0x17b
[    4.600014]  [<ffffffff80c6dd38>] ? trace_hardirqs_on_thunk+0x3a/0x3f
[    4.600014]  [<ffffffff8020c979>] child_rip+0xa/0x11
[    4.600014]  [<ffffffff80209b5b>] ? __unlazy_fpu+0x9/0x79
[    4.600014]  [<ffffffff8020be94>] ? restore_args+0x0/0x30
[    4.600014]  [<ffffffff80254504>] ? up+0x14/0x3e
[    4.600014]  [<ffffffff8137f7d1>] ? kernel_init+0x0/0x17b
[    4.600014]  [<ffffffff8020c96f>] ? child_rip+0x0/0x11
[    4.600014] ---[ end trace a7919e7f17c0a725 ]---
[    4.908030] PASSED

config attached.

	Ingo

View attachment "config" of type "text/plain" (60853 bytes)