The following reply was made to PR usb/176913; it has been noted by GNATS.
From: Christian Jurk <co...@commx.ws>
Subject: Re: usb/176913: High interrupt load with ehci
Date: Wed, 13 Mar 2013 18:08:28 +0100
Not sure if that problem is directly a USB problem, might be better to =
move it into a more appropriate category if possible.
What I did recently: Did a reboot (by using command `reboot') - the =
system did not reboot on its own. All I got on the screen was:
Syncing disks, vnodes remaining=859 2 2 2 1 1 1 0 0 done
All buffers synced.
usbus0: Controller shutdown
uhub0: at usbus0, port 1, addr 1 (disconnected)
ugen0.2: <vendor 0x8087> at usbus0 (disconnected)
uhub4: at uhub0, port 1, addr 2 (disconnected)
usbus0: Controller shutdown complete
re0: link state changed to DOWN
re0: link state changed to UP
usbus1: Controller shutdown
After waiting 30 minutes, I decided to power cycle the machine. After =
reboot, the Zpool on the USB disk was not be able to mount because of a =
missing label (the error message referred to =
http://illumos.org/msg/ZFS-8000-5E). Thus, I had to destroy the zpool =
and re-created it. I've copied lots of files to a ZFS volume on top of =
the zpool and tried to reboot the machine. Got the same problem again. =
Seeing usbub1: Controller shutdown but nothing happens. I see a relation =
between the high interrupt rate and the USB device for some reason. =
`zpool iostat 1` shows me that there are no read or write operations on =
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