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Re: kern/46232: netbsd-6 pad(4) panic: locking against myself

The following reply was made to PR kern/46232; it has been noted by GNATS.

From: Matthew Mondor <>
Subject: Re: kern/46232: netbsd-6 pad(4) panic: locking against myself
Date: Thu, 22 Mar 2012 02:34:26 -0400

 On Tue, 20 Mar 2012 17:05:01 +0000 (UTC)
 Matthew Mondor <> wrote:
 When attempting to reproduce the test today in order to see if the
 ddb.commandonenter=call ddb_vgapost  sysctl worked, I initially failed
 to crash the system, with instead a locked dd process stuck in an
 endless uninterruptible loop (and unkillable even with SIGKILL), and
 stuck audio writer process.
 There were two differences from my other tests in this case:
 - Playing a mono rather than stereo sample
 - Using -d /dev/sound1 rather than
   relinking /dev/sound, /dev/audio, /dev/audioctl to sound1, audio1 and
   audioctl1, respectively.
 With the symlinks pointing to the 1 devices, and playing stereo
 content, I still could reproduce the panic, and fortunately ddb_vgapost

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