linux-kernel - Re: [PATCH 9/11] Panic delay fix

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Message-ID: <20070214124901.2579bd12@localhost.localdomain>
Date:	Wed, 14 Feb 2007 12:49:01 +0000
From:	Alan <alan@...rguk.ukuu.org.uk>
To:	Zachary Amsden <zach@...are.com>
Cc:	Andi Kleen <ak@....de>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...l.org>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	Chris Wright <chrisw@...s-sol.org>
Subject: Re: [PATCH 9/11] Panic delay fix

> No, not that.  But the virtual keyboard I/O gets processed and converted 
> to physical keyboard I/O when a keyboard is attached to a VM.  The 
> result is that the virtual keyboard spinning out of control causes the 
> physical keyboard to receive the same commands, far too rapidly.
> 
> So the keyboard blinks out of control and acts as if possessed by demons.

Which is a good example of why breaking udelay is the wrong thing to do.
I bet vmware keyboard emulation isn't the only problematic case.

Alan
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