The following reply was made to PR port-xen/35557; it has been noted by GNATS.

From: "Thomas Feddersen" <thomas.feddersen@t-online.de>
To: <gnats-bugs@NetBSD.org>
Cc: 
Subject: RE: port-xen/35557: Xen 3.0.3 crashes when attempting to mount a usb-drive
Date: Wed, 7 Feb 2007 19:43:42 +0100

 >Environment:=20
 In the meantime I have updated to:
 $ uname -a
 NetBSD Ximus.feddersen.xx 4.0_BETA2 NetBSD 4.0_BETA2 (XEN3_DOM0) #0: Mon =
 Feb
 5 06:26:05 UTC 2007
 builds@b1.netbsd.org:/home/builds/ab/netbsd-4/i386/200702040000Z-obj/home=
 /bu
 ilds/ab/netbsd-4/src/sys/arch/i386/compile/XEN3_DOM0 i386
 
 >Description:
 The problem remains. I made another attempt with the 2,5" drive: The =
 system
 stalled when I only touched the usb-socket with the outer (shield) metal
 without actually making contact through the pins. I assume there was a
 static discharge - I held the 2,5" drive in my hand when I touched the
 socket.
 
 After reboot I made a second attempt by plugging the 3,5" drive in first =
 and
 leaving it pugged in. This time I was able to actually connect and mount =
 the
 2,5" drive. It's formatted MS-DOS, I copied a file from the 2,5" =
 usb-drive
 to /tmp, but the system response was extremely sluggish. Echo of my
 keystrokes was very irregular, delay between 0 and 20 seconds, output =
 from a
 command took up to one minute. Below is a term-shot of
 # systat vmstat 1=20
 -->=20
     2 users    Load  1.04  0.41  0.19                  Wed Feb  7 =
 16:53:32
 
 Proc:r  d  s  w     Csw    Trp    Sys   Int   Sof    Flt      PAGING
 SWAPPING
      3    12          2      6     20 95329     1      6      in  out   =
 in
 out
                                                         ops
    0.1% Sy   0.0% Us   0.0% Ni  99.9% In   0.0% Id    pages
 |    |    |    |    |    |    |    |    |    |    |
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 forks
 =20
 fkppw
            memory totals (in kB)           95329 Interrupts
 fksvm
           real  virtual     free                 vcpu0 softclock
 pwait
 Active   18416    20088     1252                 vcpu0 softnet
 relck
 All      52840    54512   131592                 vcpu0 xenevt
 rlkok
                                                2 ioapic0 pin 21
 noram
 Namei         Sys-cache     Proc-cache     95227 ioapic0 pin 17
 ndcpy
     Calls     hits    %     hits     %           ioapic0 pin 23
 fltcp
         9        9  100                          ioapic0 pin 19
 zfod
                                                  vcpu0 irq1
 cow
 Disks: seeks xfers bytes %busy               100 vcpu0 clock           =
 64
 fmin
    md0                                           vcpu0 xenbus          =
 85
 ftarg
    cd0
 itarg
    wd0              9885   0.1                                       =
 3780
 wired
    wd1
 pdfre
    wd2
 pdscn
    wd3
    wd4
    wd5
  raid0
    sd0              2471   100
 <--
 
 Even after I unmounted and unplugged the usb-drives, the system =
 perfomance
 didn't return, the shutdown took about ten times as long as usual.=20
 
 >Fix:
 Before the attempts described above, I tested a lot of connecting, =
 touching,
 mounting and copying with usb-drives under netbsd-GENERIC.MPACPI - with =
 no
 problems.
 
 Kind Regards
 Thomas
  --
 Dipl.-Ing. Thomas Feddersen
 Beratender Ingenieur
 engineering for pleasure and profit