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From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: pavel@suse.cz (Pavel Machek)
Cc: arjanv@redhat.com (Arjan van de Ven),
	geg@iitb.fhg.de (Sven Geggus),
	linux-kernel@vger.kernel.org
Subject: Re: Changing CPU Speed while running Linux
Date: Sat, 16 Jun 2001 14:23:33 +0100 (BST)	[thread overview]
Message-ID: <E15BG33-00083s-00@the-village.bc.nu> (raw)
In-Reply-To: <20010614131220.A36@toy.ucw.cz> from "Pavel Machek" at Jun 14, 2001 01:12:20 PM

> Can you dig that out? I'd like to take a look.
> 
> [Of course, problem is *not* solved: you still have short time when
> kernel runs with wrong bogomips.]

Not really. WHen you do the speed change on most of these cpus you have to
do it with IRQs off and with the PCI bridge temporarily disabled as the CPU
disconnects from the bus during speed transititions and cannot take part in
cache coherency

  parent reply	other threads:[~2001-06-16 13:35 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2001-06-13 12:35 Sven Geggus
2001-06-13 13:21 ` Arjan van de Ven
2001-06-14 13:12   ` Pavel Machek
2001-06-16 10:46     ` arjan
2001-06-16 13:23     ` Alan Cox [this message]
2001-06-16 13:56       ` Ian Stirling
2001-06-13 13:41 ` Magnus Sandberg
2001-06-13 13:49   ` Dave Jones
2001-06-13 22:23 Dieter Nützel

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