kern/74968: cdparanoia torture wedges CD-drive and PANICS kernel

[Mikhail Teterin]

The following reply was made to PR kern/74968; it has been noted by GNATS.

From: Mikhail Teterin <mi at corbulon.video-collage.com>
To: simon at FreeBSD.org (Simon L. Nielsen)
Cc: FreeBSD-gnats-submit at FreeBSD.org
Subject: Re: kern/74968: cdparanoia torture wedges CD-drive and PANICS kernel
Date: Sun, 12 Dec 2004 16:24:06 -0500 (EST)

 > On 2004.12.11 22:56:06 -0500, Mikhail Teterin wrote:
  
 > >  I have an oldish CD, with a particularly bad last track. It takes
 > >  cdparanoia many hours to move through it and it never finishes.
 > >  Two thirds through the track something happens and the ata driver
 > >  "loses" the CD. This is promptly followed by a panic with g_event
 > >  being the "current process".
 
 > Could you please obtain a back trace of the panic as described in the
 > Developers Handbook? Otherwise it's more or less impossible for anyone
 > to figure out what's going wrong.
 
 I've rebuilt the kernel with 5.x as of this morning and the problem
 appears gone. The track still generates plenty of errors, but the acd0
 devices no longer gets "lost" in the middle.
 
 I know, that backtraces are usually useful, but expected Soren to just
 figure it out by himself :-) There was, probably, a race there, which
 must've been closed since my previous kernel was built.
 
 If cdparanoia finishes chewing on this track without panicing the kernel
 again, I suppose, this PR can be closed. Yours,
 
 	-mi