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

From Thomas Gleixner <tglx@linutronix.de>
Newsgroups linux.kernel
Subject Re: PROBLEM: OHCI watchdog timeouts inside VirtualBox, probably due to timer wheel rework
Date 2016-10-21 21:50 +0200
Message-ID <suNZf-1D0-3@gated-at.bofh.it> (permalink)
References <suNPz-1zm-3@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Fri, 21 Oct 2016, Michal Necasek wrote:

> I'll get back to you on whether increasing the timeout helps, it'll take
> a bit of testing. Does it actually sound plausible that some controllers
> could not get things done in 250ms but could in 275ms?

There is a bug in the new timer wheel code, which causes a timer to fire
way too early. That USB timeout is just exposing the issue.

We do not yet understand the issue completely, but we are working on it.

Thanks,

	tglx

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Thread

Re: PROBLEM: OHCI watchdog timeouts inside VirtualBox, probably due  to timer wheel rework Michal Necasek <michal.necasek@oracle.com> - 2016-10-21 21:40 +0200
  Re: PROBLEM: OHCI watchdog timeouts inside VirtualBox, probably due  to timer wheel rework Thomas Gleixner <tglx@linutronix.de> - 2016-10-21 21:50 +0200
  Re: PROBLEM: OHCI watchdog timeouts inside VirtualBox, probably due  to timer wheel rework Alan Stern <stern@rowland.harvard.edu> - 2016-10-21 23:00 +0200

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