linux-kernel - Re: [PATCH] mm/hugetlb: __get_user_pages ignores certain follow_hugetlb

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Date:   Fri, 21 Jul 2017 20:05:02 -0400
From:   Daniel Jordan <daniel.m.jordan@...cle.com>
To:     Punit Agrawal <punit.agrawal@....com>
Cc:     linux-mm@...ck.org, aarcange@...hat.com, akpm@...ux-foundation.org,
        aneesh.kumar@...ux.vnet.ibm.com, gerald.schaefer@...ibm.com,
        james.morse@....com, kirill.shutemov@...ux.intel.com,
        mhocko@...e.com, mike.kravetz@...cle.com,
        n-horiguchi@...jp.nec.com, zhongjiang@...wei.com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm/hugetlb: __get_user_pages ignores certain
 follow_hugetlb_page errors

Hi Punit,

On 07/21/2017 05:20 AM, Punit Agrawal wrote:
> The change makes sense.
> FWIW,
>
> Acked-by: Punit Agrawal <punit.agrawal@....com>

Thanks, I appreciate that.

> I was wondering how you hit the issue. Is there a test case that could
> have spotted this earlier?

This was actually just by inspection.

I checked selftests/vm, but there's nothing in there that would have 
come close to spotting this, so unfortunately there's no existing test case.

Thanks,
Daniel