8.0-RC USB/FS problem

Guojun Jin gjin at ubicom.com
Thu Nov 26 07:35:05 UTC 2009

Most crash had the same back trace. This is also true when USB access hangs, then unplug the drive.

More interesting is the third AMD laptop (dual core) had similar problem, but it is less crashing but hanging.

The core information is available at the same place (bt file is also attached):


-rw-r--r--  1 jin         wheel      4668 Nov 25 23:17 bt
-rw-------  1 4294967294  wheel     80074 Nov 25 22:59 core.txt.0
-rw-r--r--  1 4294967294  wheel  72108588 Nov 25 23:09 coredump-0.tbz

core.txt.0 is from savecore, and bt is I did back trace so it has slightly more information than core.txt.
The tbz file contains the kernel.symbol and all files from savecore.

I will continute to dig this and I will set more coredump if new crash happens at different place.
Please let me know anything I can help debug futher before Dec 3rd. I will on travel for a while and I do
not want to hold release for another two weeks. So let's resolve the problem before I am on travel if possible.

-----Original Message-----
From: Hans Petter Selasky [mailto:hselasky at c2i.net]
Sent: Wed 11/25/2009 12:37 AM
To: Guojun Jin
Cc: freebsd-usb at freebsd.org; bugs at freebsd.org; freebsd-stable at freebsd.org
Subject: Re: 8.0-RC USB/FS problem
On Wednesday 25 November 2009 00:08:59 Guojun Jin wrote:
> What other debug shall we turn on to analyze this problem.

Are you able to extract the panic message? Try enabling dump on the swap 


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