Subject: Re: s390 hugetlb oops with libhugetlbfs test-suite
From: Gerald Schaefer <gerald.schaefer@de.ibm.com>
To: Nishanth Aravamudan <nacc@us.ibm.com>
Cc: schwidefsky@de.ibm.com, LKML <linux-kernel@vger.kernel.org>,
       agl@us.ibm.com
In-Reply-To: <20080726034127.GA8338@us.ibm.com>
References: <20080725211035.GA19738@us.ibm.com>
	 <20080726033254.GA3810@us.ibm.com>  <20080726034127.GA8338@us.ibm.com>
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Date: Tue, 29 Jul 2008 19:22:43 +0200
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On Fri, 2008-07-25 at 20:41 -0700, Nishanth Aravamudan wrote:
> Odd, this is the same kernel as last time, which wasn't tainted. The reason for
> the taint is the following:
> 
> ------------[ cut here ]------------
> Badness at drivers/s390/cio/qdio_main.c:1361

Hi,

This was fixed by our qdio developer recently, but the fix is not yet
upstream. However, I doubt that this is related to the hugetlbfs problem.

I was able to reproduce the "Bad page state", with the current libhugetlbfs
development snapshot and your patch for s390. It only happened on machines
with software large page emulation, but we certainly have a problem there.
Thanks for reporting this bug and adding s390 support to libhugetlbfs, I
will look into this problem.

Thanks,
Gerald


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