Subject: Re: [ppc64] 2.6.29-git7 : offlining a cpu causes an exception

From: Sachin Sant <[email-masked]>
Date: Wed, 01 Apr 2009 17:18:14 +0530

Sachin Sant wrote:
> Benjamin Herrenschmidt wrote:
>> On Tue, 2009-03-31 at 14:57 +0530, Sachin Sant wrote:
>>  
>>> While executing CPU HotPlug[1] tests i observed that during
>>> every cpu offline process an exception is thrown.
>>>     
>>
>> Looks like a BUG_ON() to me... can you look at what other
>> messages just before that ?  
>
Ben, seems like the following patch is causing the cpu hotplug
test failure. 

[PATCH 6/6] powerpc/mm: Introduce early_init_mmu() on 64-bit

http://ozlabs.org/pipermail/linuxppc-dev/2009-March/069613.html

If i back out this patch, i am able to offline/online cpu's
without any issue.

Thanks
-Sachin

-- 

---------------------------------
Sachin Sant
IBM Linux Technology Center
India Systems and Technology Labs
Bangalore, India
---------------------------------