From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Mosberger <davidm@napali.hpl.hp.com>
Date: Tue, 06 Jul 2004 23:43:30 +0000
Subject: Re: BUG 2.6.7 hangs on boot (rx2600)
Message-Id: <16619.14626.608748.32977@napali.hpl.hp.com>
List-Id: <linux-ia64.vger.kernel.org>
References: <20040622061505.GA23075@cup.hp.com>
In-Reply-To: <20040622061505.GA23075@cup.hp.com>
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To: linux-ia64@vger.kernel.org

>>>>> On Wed, 30 Jun 2004 09:17:18 -0700, Jesse Barnes <jbarnes@engr.sgi.com> said:

  Jesse> On Tuesday, June 29, 2004 4:18 pm, David Mosberger wrote:
  >> >>>>> On Tue, 29 Jun 2004 11:19:34 -0700, "Chen, Kenneth W"
  >> >>>>> <kenneth.w.chen@intel.com> said:

  Ken> Looks like there are more places where kernel does "virt ->
  Ken> phys -> virt".  And conversion from phys to virt is setting 3
  Ken> msb to 1.

  >> Your fixes work fine on the machines I have tried so far (variety of
  >> Itanium 2 boxen and a Big Sur Merced box).

  >> Jesse, do you know if unapplying the "move current to region 5" patch
  >> fixes your boot-problem?  For convenience, I attached the (original)
  >> patch below.

  Jesse> Yes, reverting that patch does fix the hang I'm seeing.

A quick grep shows that MINSTATE_END_SAVE_MIN_PHYS would also convert
the region 5 "current" into a region 7 address.  An MCA at the right
time might cause problems, I think.

	--david