misc/116898: panic: sleeping thread while using USB hard drive

Richard Puga puga at mauibuilt.com
Thu Oct 4 03:20:02 PDT 2007

>Number:         116898
>Category:       misc
>Synopsis:       panic: sleeping thread while using USB hard drive
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Oct 04 10:20:01 GMT 2007
>Originator:     Richard Puga
>Release:        FreeBSD i386 7-CURRENT
Maui Built Machines LLC
FreeBSD mauibuilt.com 7.0-CURRENT FreeBSD 7.0-CURRENT #15: Mon Sep 24 22:22:16 HST 2007     root at mauibuilt.com:/usr/src/sys/i386/compile/MAUIBUILT  i386
Core dumps and relevent message files are avalible at;


I have been installing FreeBSD 6.2 on IBM XSeries servers some of which
I need to run external USB  drives.

While backing up to a USB hard drive at random times the computer locks
up or reboots with some, but not all of the systems.

The XP3100's work fine and dmesg shows a ntel 82801GB/R ICH7 USB
The XP3400 shows a GENERIC usb 2.0 chipset and a scan of the PCI bus
shows a slightly differant motherboard chipset (I cant remember what it

I set up my Dell server at home with 2 differant USB/PCI cards each with
a differant chipset and got the same type of errors.

The errors on the screen which dont make it to the log are;

sleeping thread (tid 100015, pid 19) owns a non-sleepable-lock
panic: sleeping thread


panic: Trying sleep, but thread marked as sleeping prohimited
[thread pid 13 tid 100002]
stoped at kbd-enter + ox32: leave db7
backup to a usb drive, the problem will occur anywhere from 5 minutes to 5 hours.


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