PROBLEM: OHCI watchdog timeouts inside VirtualBox, probably due to timer wheel rework

From	Michael Thayer <michael.thayer@oracle.com>
Newsgroups	linux.kernel
Subject	PROBLEM: OHCI watchdog timeouts inside VirtualBox, probably due to timer wheel rework
Date	2016-10-21 17:30 +0200
Message-ID	<suJVF-7tM-55@gated-at.bofh.it> (permalink)
Organization	ORACLE Deutschland B.V. und Co. KG

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Hello Alan (LKML on CC),

Contacting you about this on Thomas Gleixner's (also on CC) suggestion. 
The short summary is that when Linux 4.8.0 (also tested with a few later 
kernels) is run on a VirtualBox virtual machine with USB enabled, OHCI 
fails with the log messages "frame counter not updated; disabled" and 
"HC died; cleaning up".  This seems to be due to the 250 ms interval 
watchdog running with far too short intervals, which we think is a 
consequence of the timer wheel code rework.  I will refer you to a bug 
filed in Launchpad<1> for a longer description.

Hope this is of interest to you.

Regards,

Michael

<1> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1634737
-- 
Michael Thayer | VirtualBox engineer
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PROBLEM: OHCI watchdog timeouts inside VirtualBox, probably due to  timer wheel rework Michael Thayer <michael.thayer@oracle.com> - 2016-10-21 17:30 +0200
  Re: PROBLEM: OHCI watchdog timeouts inside VirtualBox, probably due  to timer wheel rework Alan Stern <stern@rowland.harvard.edu> - 2016-10-21 19:00 +0200

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