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Subject: Re: [Bug 204789] New: Boot failure with more than 256G of memory
To: Cameron Berkenpas <cam@neo-zeon.de>,
 Andrew Morton <akpm@linux-foundation.org>
References: <bug-204789-27@https.bugzilla.kernel.org/>
 <20190911073153.9df4d4618d7f99752cd18edd@linux-foundation.org>
 <875zlw7q5s.fsf@linux.ibm.com> <87zhj85lac.fsf@linux.ibm.com>
 <a18615a4-be8b-4df0-addb-7841567923f6@neo-zeon.de>
From: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Message-ID: <28de8cb6-3213-56aa-8ed6-fbdb109ab3df@linux.ibm.com>
Date: Fri, 13 Sep 2019 21:43:04 +0530
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On 9/13/19 8:35 PM, Cameron Berkenpas wrote:
> Yep, the box comes up now, but with 256G memory as expected.
> 
> I'll get back to you on when I'll be able to bisect.
> 
> Thanks!

I am sure this is due to

commit: 0034d395f89d ("powerpc/mm/hash64: Map all the kernel regions in 
the same 0xc range"),

We reduced the linear map range for 4K page size to 16TB there.


-aneesh