linux-kernel - Re: [PATCH v3 0/6] hid: Introduce device groups

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Message-ID: <alpine.LNX.2.00.1204301043340.1856@pobox.suse.cz>
Date:	Mon, 30 Apr 2012 10:44:21 +0200 (CEST)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Henrik Rydberg <rydberg@...omail.se>
Cc:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 0/6] hid: Introduce device groups

On Mon, 30 Apr 2012, Jiri Kosina wrote:

> > Here is the third version of the extension to the device-driver
> > matching mechanism. AFAICT, there are no outstanding issues. I think
> > we are getting close. :-)
> 
> I think so, and overall I like the aproach and the implementation. Thanks!
> 
> Just got the stacktrace on [1] though when running kernel with this 
> patchset. The trace popped during shutdown, and the machine froze 
> completely; I didn't have any kind of external console connected, so 
> unfortunately I don't have the beginning of the whole thing.
> 
> I haven't been able to reproduce it so far. This was after several 
> "parallel" plug/remove cycles of multiple HID devices driven by multiple 
> different drivers.
> 
> I haven't performed any analysis what this might be yet.
> 
> [1] http://www.jikos.cz/jikos/junk/autoloading-trace.jpg

It actually seems to be spinlock lockup (due to the NMI trigger being 
apparent at the very first line) on kbd_event_lock ...

-- 
Jiri Kosina
SUSE Labs
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