Messages in this thread | | | Subject | Re: [PATCH 1/6] UML - Deal with host time going backwards | From | Nix <> | Date | Tue, 03 Jun 2008 20:52:18 +0100 |
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On 3 Jun 2008, Daniel Hazelton said:
> On Tuesday 03 June 2008 03:32:11 pm Andrew Morton wrote: >> On Tue, 3 Jun 2008 15:02:35 -0400 >> >> Jeff Dike <jdike@addtoit.com> wrote: >> > Protection against the host's time going backwards - keep track of the >> > time at the last tick and if it's greater than the current time, keep >> > time stopped until the host catches up. >> >> Strange. What would cause the host's time (or at least UML's perception >> of it) to go backwards? > > A wild guess would be that the UML process is running "fast" at some point and > its expectation of the host's time is skewed forward because of that.
Quite so. Simply running ntp on the host (in slew-only mode, no less!) can cause this.
> Another possibility is that the hosts clock got reset between the times UML > has checked it and the correction was a negative one.
That too.
-- `If you are having a "ua luea luea le ua le" kind of day, I can only assume that you are doing no work due [to] incapacitating nausea caused by numerous lazy demons.' --- Frossie
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