I diffed the two console log files and found no interesting differences
except for the fact that eth0 comes up for
Linus' kernel and not for the perfmon kernel.  Below is the diff of the two
logs.

$ diff eranian torvalds
38c38
< Starting Linux PPC64 #1 SMP Tue Jul 8 20:05:21 EDT 2008
---
> Starting Linux PPC64 #1 SMP Tue Jul 8 19:33:36 EDT 2008
45c45
< Linux version 2.6.26-rc9-02187-gd0c241a ([EMAIL PROTECTED])
(gcc version 4.1.2 20071124 (Red Hat 4.1.2-42)) #1 SMP Tue Jul 8 20:05:21
EDT 2008
---
> Linux version 2.6.26-rc9-00047-gf57e916 ([EMAIL PROTECTED])
(gcc version 4.1.2 20071124 (Red Hat 4.1.2-42)) #1 SMP Tue Jul 8 19:33:36
EDT 2008
80c80
< Memory: 31972132k/32505856k available (6912k kernel code, 533724k
reserved, 1164k data, 615k bss, 284k init)
---
> Memory: 31972132k/32505856k available (6908k kernel code, 533724k
reserved, 1168k data, 615k bss, 284k init)
109c109
< type=2000 audit(1215549563.756:1): initialized
---
> type=2000 audit(1215549911.808:1): initialized
244c244
< Setting clock  (localtime): Tue Jul  8 20:39:34 EDT 2008 [  OK  ]
---
> Setting clock  (localtime): Tue Jul  8 20:45:22 EDT 2008 [  OK  ]
253c253
< /dev/sda6: clean, 214250/6209536 files, 1945033/12414208 blocks
---
> /dev/sda6: clean, 214252/6209536 files, 1945047/12414208 blocks
265,266c265:
< Bringing up interface eth0:  Device eth0 does not seem to be present,
delaying initialization.
< [FAILED]
---
> Bringing up interface eth0:  [  OK  ]
306c306
< Kernel 2.6.26-rc9-02187-gd0c241a on an ppc64
---
> Kernel 2.6.26-rc9-00047-gf57e916 on an ppc64


[EMAIL PROTECTED] wrote on 07/08/2008 05:30:25
PM:
>
> Hi Stephane,
>
> For some reason, the 2.6.26-rc9 perfmon kernel will not boot correctly
> on my POWER6 machine, even though I have perfmon disabled completely.
> The ethernet interface will not come up.
>
> I tried building a 2.6.26-rc9 from Linus Torvalds' git using the exact
> same .config file, and it does come up ok.
>
> In case it matters, the base machine's distro is RHEL 5.2.
>
> Do you know of any differences between these two kernels - 2.6.26-rc9
> and the perfmon version - when perfmon is disabled?
>
> Do you have any ideas as to why this might be happening?  I will get
> some boot log files to see where they start diverging.
>
> Thanks,
>
> - Corey
>
>
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