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Date: Sun, 11 Feb 2001 22:05:35 +1100
From: Andrew Morton <andrewm@uow.edu.au>
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To: Pavel Machek <pavel@suse.cz>
CC: Hacksaw <hacksaw@hacksaw.org>,
        Tom Eastep <teastep@seattlefirewall.dyndns.org>,
        linux-kernel@vger.kernel.org
Subject: Re: [OT] Major Clock Drift
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		<3A7EA9B3.3507DC8D@uow.edu.au>; from Andrew Morton on Tue, Feb 06, 2001 at 12:25:07AM +1100 <20010210225851.G7877@bug.ucw.cz>
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Pavel Machek wrote:
> 
> Hi!
> 
> > > >I've discovered that heavy use of vesafb can be a major source of clock
> > > >drift on my system, especially if I don't specify "ypan" or "ywrap". On my
> > >
> > > This is extremely interesting. What version of ntp are you using?
> >
> > Is vesafb one of the drivers which blocks interrupts for (many) tens
> > of milliseconds?
> 
> Vesafb is happy to block interrupts for half a second.

And has this been observed to cause clock drift?

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