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From: Robert Watson <rwatson@FreeBSD.org>
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To: Ed Schouten <ed@80386.nl>
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Cc: Lucius Windschuh <lwindschuh@googlemail.com>,
	FreeBSD Current <current@freebsd.org>
Subject: Re: uaudio attach panic: Giant not locked
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On Wed, 5 Aug 2009, Ed Schouten wrote:

> * Lucius Windschuh <lwindschuh@googlemail.com> wrote:
>> So I updated my machine to CURRENT r196062 and use a USB audio
>> converter. Attaching it to the machine leads to a kernel panic:
>>
>> <snip>
>
> I suspect this has something to do with the Newbus locking, which causes 
> some pieces of code to run without Giant held, while they previously did.

There's a patch in the re@ queue to re-add Giant around newbus attachment, per 
John Baldwin's request.  However, committing that patch is stalled while 
issues with the svn->cvs export of the new RELENG_8 branch are resolved.  I 
expect to see the patch go into the tree RSN.

Robert N M Watson
Computer Laboratory
University of Cambridge