linux-kernel - Re: [PATCH v4 4/5] mm: Fix page reference leak in soft_offline

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Message-ID: <c470b3d344e560e5c1c7b57f9bf83a37@suse.de>
Date:   Thu, 14 Jan 2021 07:30:11 +0100
From:   Oscar Salvador <osalvador@...e.de>
To:     Dan Williams <dan.j.williams@...el.com>
Cc:     HORIGUCHI NAOYA(堀口 直也) 
        <naoya.horiguchi@....com>, akpm@...ux-foundation.org,
        Naoya Horiguchi <nao.horiguchi@...il.com>,
        Michal Hocko <mhocko@...nel.org>,
        David Hildenbrand <david@...hat.com>, stable@...r.kernel.org,
        linux-mm@...ck.org, linux-nvdimm@...ts.01.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 4/5] mm: Fix page reference leak in soft_offline_page()

On 2021-01-14 07:18, Dan Williams wrote:
> To be honest I dislike the entire flags based scheme for communicating
> the fact that page reference obtained by madvise needs to be dropped
> later. I'd rather pass a non-NULL 'struct page *' than redo
> pfn_to_page() conversions in the leaf functions, but that's a much
> larger change.

We tried to remove that flag in the past but for different reasons.
I will have another look to see what can be done.

Thanks

-- 
Oscar Salvador
SUSE L3