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Date: Sat, 26 Jul 2003 01:08:26 -0700
From: Andrew Morton <akpm@osdl.org>
To: Romit Dasgupta <romit@myrealbox.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Debug: sleeping function called from invalid context at
 include/linux/rwsem.h:43
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Romit Dasgupta <romit@myrealbox.com> wrote:
>
>             Just found some debug messages like the subject above, from 
>  the latest kernel compiled with debug options. Attached are the dmesg 
>  output and the .config file. Not sure if anyone has seen this.

Probably some initcall has more spin_lock()s than spin_unlock()s and the
init process's preempt count ended up permanently out of whack.

Please boot with "initcall_debug=1" on the boot command line and if you see
a line of the form:

error in initcall at 0xXXXXXXXX: returned with preemption imbalance

then please look up 0xXXXXXXXX in System.map and let us know.