linux-kernel - Re: rcu_read_lock() used illegally while idle!

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Message-ID: <20130524224152.GC17786@redhat.com>
Date:	Fri, 24 May 2013 18:41:52 -0400
From:	Dave Jones <davej@...hat.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	paulmck@...ux.vnet.ibm.com,
	Linux Kernel <linux-kernel@...r.kernel.org>, fweisbec@...il.com
Subject: Re: rcu_read_lock() used illegally while idle!

On Fri, May 24, 2013 at 03:23:40PM -0400, Steven Rostedt wrote:
 > On Fri, 2013-05-24 at 10:23 -0400, Dave Jones wrote:
 > 
 > > .config: http://paste.fedoraproject.org/14281/94052971/raw/
 > > 
 > > trace shows the problem process was 'cc1', so I was likely building a kernel
 > > at the time.  There was also a trinity run going on in the background.
 > > 
 > > cmdline: nothing special..
 > > 
 > > BOOT_IMAGE=/vmlinuz-3.10.0-rc2+ root=UUID=bee21cd9-1852-4d1d-9e9d-2e44332b8df1 ro rd.md=0 rd.lvm=0 rd.dm=0 vconsole.keymap=us rd.luks=0 vconsole.font=latarcyrheb-sun16 consoleblank=0 console=ttyUSB0,115200 console=tty0 pause_on_oops=30 audit=0
 > > 
 > 
 > OK, I'm able to reproduce this. Looks like the same issue happens from
 > other ways from userspace into the kernel (the next way was tracing
 > system calls).
 > 
 > Forget the other patch. Here's a new patch that is more specific to
 > tracing and context tracking.
 > 
 > Can you try this one out, please.

It's looking good so far.

	Dave

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