Re: ACPI hotplug panic with current git head

[James Bottomley <James.Bottomley@HansenPartnership.com>]

On Mon, 2009-01-12 at 18:48 -0600, James Bottomley wrote:
> On Mon, 2009-01-12 at 16:16 -0500, Len Brown wrote:
> > > This is on an IBM Maia system with the calgary IOMMU enabled. It's a
> > > fatal boot up panic.
> > > 
> > 
> > James,
> > A guided bisect...
> > Please let me know which of these fail
> > 
> > a3a798c88a14b35e5d4ca30716dbc9eb9a1ddfe2 is 2.6.29 at ACPI merge
> > efcb3cf7f00c3c424db012380a8a974c2676a3c8 is 2.6.29 before ACPI merge
> 
> Didn't try these (being after the failure)
> 
> > ec9f168fcc344d2ffec1c8c822076bf22dab5c33 is 2.6.28 with most ACPI
> 
> This is the failing one.
> 
> > e8443c358c34f3fe65236e24147ddf0cd0e61b08 is 2.6.28 plus just ACPICA
> 
> This one boots fine.
> 
> > Please test the "2.6.28+ACPICA" one first.
> > If it fails, we are close so you can skip the others above
> > and bisect between that and 2.6.28.
> 
> I'll try bisecting between ec9f168fcc344d2ffec1c8c822076bf22dab5c33 and
> e8443c358c34f3fe65236e24147ddf0cd0e61b08.

OK, bisection complete.  It's not actually coming from the ACPI tree but
from the PCI one (appropriate CC's added).

The commit causing the boot panic is:

commit e8c331e963c58b83db24b7d0e39e8c07f687dbc6
Author: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Date:   Wed Dec 17 12:09:12 2008 +0900

    PCI hotplug: introduce functions for ACPI slot detection

I'm still not sure why, though

James