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From: Thomas Gleixner <tglx@linutronix.de>
To: Michal Necasek <michal.necasek@oracle.com>
Cc: stern@rowland.harvard.edu, michael.thayer@oracle.com,
	knut.osmundsen@oracle.com, linux-kernel@vger.kernel.org
Subject: Re: PROBLEM: OHCI watchdog timeouts inside VirtualBox, probably due to timer wheel rework
Date: Fri, 21 Oct 2016 21:45:10 +0200 (CEST)	[thread overview]
Message-ID: <alpine.DEB.2.20.1610212142040.4855@nanos> (raw)
In-Reply-To: <fbf55df4-c6f1-4b3d-a179-747711ea7411@default>

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

  reply	other threads:[~2016-10-21 19:47 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-10-21 19:33 Michal Necasek
2016-10-21 19:45 ` Thomas Gleixner [this message]
2016-10-21 20:57 ` Alan Stern
  -- strict thread matches above, loose matches on Subject: below --
2016-10-21 15:29 Michael Thayer
2016-10-21 16:54 ` Alan Stern

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