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From: Punit Agrawal <punit.agrawal@arm.com>
Subject: Re: [PATCH v2] mm: hwpoison: disable memory error handling on 1GB hugepage
References: <20180130013919.GA19959@hori1.linux.bs1.fc.nec.co.jp>
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	<20180208121749.0ac09af2b5a143106f339f55@linux-foundation.org>
Date: Fri, 09 Feb 2018 11:06:31 +0000
In-Reply-To: <20180208121749.0ac09af2b5a143106f339f55@linux-foundation.org>
	(Andrew Morton's message of "Thu, 8 Feb 2018 12:17:49 -0800")
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To: Andrew Morton <akpm@linux-foundation.org>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>, "linux-mm@kvack.org" <linux-mm@kvack.org>, Michal Hocko <mhocko@kernel.org>, Mike Kravetz <mike.kravetz@oracle.com>, "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>, Anshuman Khandual <khandual@linux.vnet.ibm.com>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, Benjamin Herrenschmidt <benh@kernel.crashing.org>, Michael Ellerman <mpe@ellerman.id.au>

Andrew Morton <akpm@linux-foundation.org> writes:

> On Thu, 08 Feb 2018 12:30:45 +0000 Punit Agrawal <punit.agrawal@arm.com> wrote:
>
>> >
>> > So I don't think that the above test result means that errors are properly
>> > handled, and the proposed patch should help for arm64.
>> 
>> Although, the deviation of pud_huge() avoids a kernel crash the code
>> would be easier to maintain and reason about if arm64 helpers are
>> consistent with expectations by core code.
>> 
>> I'll look to update the arm64 helpers once this patch gets merged. But
>> it would be helpful if there was a clear expression of semantics for
>> pud_huge() for various cases. Is there any version that can be used as
>> reference?
>
> Is that an ack or tested-by?

It's an ack - I should've been more explicit.

Acked-by: Punit Agrawal <punit.agrawal@arm.com>

Thanks,
Punit

[...]

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