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From: David Mosberger <davidm@hpl.hp.com>
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Date: Sat, 8 Dec 2001 08:41:23 -0800
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: davidm@hpl.hp.com, marcelo@conectiva.com.br (Marcelo Tosatti),
        akpm@zip.com.au (Andrew Morton), j-nomura@ce.jp.nec.com,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH] 2.4.16 kernel/printk.c (per processorinitializationcheck)
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>>>>> On Sat, 8 Dec 2001 11:27:19 +0000 (GMT), Alan Cox <alan@lxorguk.ukuu.org.uk> said:

  >> I'm no x86 expert, but I have the impression that
  >> current_cpu_data.loops_per_jiffy will be invalid (probably 0)
  >> until smp_store_cpu_info() is called in smp_callin().  If so, a
  >> console driver using udelay() might not work properly.  I suspect
  >> there are other issues, but this is just based on looking at the
  >> x86 source code for 5 minutes.

  Alan> x86_udelay_tsc wont have been set at that point so the main
  Alan> timer is still being used.

x86 does use current_cpu_data.loops_per_jiffy in the non-TSC case, no?

	--david
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