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Date:   Wed, 1 Sep 2021 15:09:14 -0300
From:   Jason Gunthorpe <jgg@ziepe.ca>
To:     David Hildenbrand <david@redhat.com>
Cc:     Qi Zheng <zhengqi.arch@bytedance.com>, akpm@linux-foundation.org,
        tglx@linutronix.de, hannes@cmpxchg.org, mhocko@kernel.org,
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        mika.penttila@nextfour.com, linux-doc@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-mm@kvack.org,
        songmuchun@bytedance.com
Subject: Re: [PATCH v2 6/9] mm: free user PTE page table pages
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On Wed, Sep 01, 2021 at 07:58:47PM +0200, David Hildenbrand wrote:
> You'll most likely have to touch each and every place either way, for
> example when suddenly returning "null" instead of a pte. It's just a matter
> of making this easier to review and the changes as minimal and as clear as
> possible.

I imagine the leading series to add the simplified API would include
the null return already - the THP race avoidance requires it anyhow.

So you end up with a simpler self contained series that is a stand
alone improvement followed by a much smaller series here that doesn't
got back and re-touch the first series's changes.

Jason