linux-kernel - Re: [PATCH v4 03/15] mm,madvise: call soft_offline_page() without MF_COUNT

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Message-ID: <0467947a-4306-bc36-2c5e-04e578990d36@oracle.com>
Date:   Thu, 16 Jul 2020 16:15:01 -0700
From:   Mike Kravetz <mike.kravetz@...cle.com>
To:     Oscar Salvador <osalvador@...e.de>, akpm@...ux-foundation.org
Cc:     mhocko@...e.com, linux-mm@...ck.org, david@...hat.com,
        aneesh.kumar@...ux.vnet.ibm.com, naoya.horiguchi@....com,
        linux-kernel@...r.kernel.org,
        Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
        Oscar Salvador <osalvador@...e.com>
Subject: Re: [PATCH v4 03/15] mm,madvise: call soft_offline_page() without
 MF_COUNT_INCREASED

On 7/16/20 5:37 AM, Oscar Salvador wrote:
> From: Naoya Horiguchi <n-horiguchi@...jp.nec.com>
> 
> The call to get_user_pages_fast is only to get the pointer to a struct
> page of a given address, pinning it is memory-poisoning handler's job,
> so drop the refcount grabbed by get_user_pages_fast
> 
> Signed-off-by: Naoya Horiguchi <n-horiguchi@...jp.nec.com>
> Signed-off-by: Oscar Salvador <osalvador@...e.com>

Reviewed-by: Mike Kravetz <mike.kravetz@...cle.com>

-- 
Mike Kravetz