linux-kernel - Re: 2.6.26-rc2-mm1 - machine stuck while booting up with CONFIG_FTRACE_STARTUP

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Date:	Mon, 19 May 2008 19:38:02 +0530
From:	Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com>
To:	Steven Rostedt <srostedt@...hat.com>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	Andy Whitcroft <apw@...dowen.org>,
	Balbir Singh <balbir@...ux.vnet.ibm.com>
Subject: Re: 2.6.26-rc2-mm1 - machine stuck while booting up with CONFIG_FTRACE_STARTUP_TEST
 enabled

Steven Rostedt wrote:
> Kamalesh Babulal wrote:
>> Hi Andrew,
>>
>> The 2.6.26-rc2-mm1 kernel gets stuck, while booting up on x86_64 machine,
>> with the CONFIG_FTRACE_STARTUP_TEST enabled. The following .config
>> options related to FTRACE are enabled. 
>>
>> CONFIG_FTRACE_SELFTEST=y
>> CONFIG_FTRACE_STARTUP_TEST=y
>> CONFIG_FTRACE=y
>> CONFIG_HAVE_FTRACE=y
>> CONFIG_DYNAMIC_FTRACE=y
>>
> 
> [...]
> 
>> Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 1805035
>> Policy zone: Normal
>> Kernel command line: root=/dev/sda1 ro console=tty0 console=ttyS0,38400n1 noapci IDENT=1211176695
> 
> Hi, could you do nmi_watchdog=1 and see if that gives you a stack dump?
> 
> Thanks.
> 
> -- Steve

Hi Steven,

Passing nmi_watchdog=1 did not help in getting any extra information, over the previous
console log. The boot up message is stuck exactly at the same place.

> 
> [...]
> 
>> checking if image is initramfs... it is
>> Freeing initrd memory: 1466k freed
>> audit: initializing netlink socket (disabled)
>> type=2000 audit(1211176950.517:1): initialized
>> Testing tracer sched_switch: PASSED
>> Testing tracer sysprof: PASSED
>> Testing tracer ftrace: 
>>
> 

-- 
Thanks & Regards,
Kamalesh Babulal,
Linux Technology Center,
IBM, ISTL.
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