linux-kernel - [BUG RT] - rcupreempt.c:133 on 2.6.23-rc1-rt7

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Date:	Sun, 05 Aug 2007 00:51:24 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	"Paul E. McKenney" <paulmck@...ibm.com>
Cc:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	RT <linux-rt-users@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: [BUG  RT] - rcupreempt.c:133 on 2.6.23-rc1-rt7

Why is it, that every time I go to write examples for my chapter in a
book, that I hit a bug!

I got this on bootup of my Thinkpad G41 running SMP.

Installing knfsd (copyright (C) 1996 okir@...ad.swb.de).
WARNING: at kernel/rcupreempt.c:133 __rcu_read_lock()
 [<c010557a>] show_trace_log_lvl+0x35/0x54
 [<c01061bd>] show_trace+0x2c/0x2e
 [<c01061e8>] dump_stack+0x29/0x2b
 [<c01660d9>] __rcu_read_lock+0x13f/0x14e
 [<c02f61fd>] ip_local_deliver+0x73/0x2b6
 [<c02f5e74>] ip_rcv+0x2d8/0x5ee
 [<c02d4324>] netif_receive_skb+0x2b7/0x3fc
 [<c02d68b4>] process_backlog+0xb0/0x148
 [<c02d6b6a>] net_rx_action+0xe0/0x1dd
 [<c01311a8>] ksoftirqd+0x126/0x240
 [<c013f9d2>] kthread+0x44/0x69
 [<c0105147>] kernel_thread_helper+0x7/0x10
 =======================


I don't have time to look further now, and it's something that isn't
easily reproducible (Well, it happened once out of two boots). If you
need me to look further, or need a config or dmesg (I have both), then
just give me a holler.

-- Steve


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