Bug 13668

Summary: Can't boot 2.6.30 powerpc kernel under qemu.
Product: Platform Specific/Hardware Reporter: Rafael J. Wysocki (rjw)
Component: PPC-32Assignee: platform_ppc-32
Status: CLOSED DOCUMENTED    
Severity: normal CC: jk
Priority: P1    
Hardware: All   
OS: Linux   
Kernel Version: 2.6.30 Subsystem:
Regression: Yes Bisected commit-id:
Bug Depends on:    
Bug Blocks: 13070    

Description Rafael J. Wysocki 2009-06-28 23:14:34 UTC 
Subject    : Can't boot 2.6.30 powerpc kernel under qemu.
Submitter  : Rob Landley <rob@landley.net>
Date       : 2009-06-27 18:08
References : http://lkml.org/lkml/2009/6/27/159

This entry is being used for tracking a regression from 2.6.29.  Please don't
close it until the problem is fixed in the mainline.

Bisected down to:

60ee031940c1b09c137b617a8829e2f081961fe0 is first bad commit
commit 60ee031940c1b09c137b617a8829e2f081961fe0
Author: Jeremy Kerr <jk@ozlabs.org>
Date:   Tue Feb 17 11:44:14 2009 +1100

    powerpc/spufs: Use correct return value for spu_handle_mm_fault

    Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
    Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Comment 1 Jeremy Kerr 2009-06-29 01:51:22 UTC 
Sent a reply to this on lkml, but looks like I lost the reply-to:

 http://lkml.org/lkml/2009/6/27/175

In short: the config posted on the original mail does not have CONFIG_SPU_BASE, so the only file touched by 60ee031940c1b09c137b617a8829e2f081961fe0 is never compiled.

I'd suggest re-bisecting to find the actual culprit.
Comment 2 Rafael J. Wysocki 2009-07-07 11:06:16 UTC 
On Tuesday 07 July 2009, Rob Landley wrote:
> On Monday 06 July 2009 19:01:05 Rafael J. Wysocki wrote:
> > This message has been generated automatically as a part of a report
> > of regressions introduced between 2.6.29 and 2.6.30.
> >
> > The following bug entry is on the current list of known regressions
> > introduced between 2.6.29 and 2.6.30.  Please verify if it still should
> > be listed and let me know (either way).
> >
> >
> > Bug-Entry   : http://bugzilla.kernel.org/show_bug.cgi?id=13668
> > Subject             : Can't boot 2.6.30 powerpc kernel under qemu.
> > Submitter   : Rob Landley <rob@landley.net>
> > Date                : 2009-06-27 18:08 (10 days old)
> > References  : http://lkml.org/lkml/2009/6/27/159
> 
> Resolved, it just required a configuration change.