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Date: Thu, 22 Mar 2018 15:36:36 -0700
From: Andrew Morton <akpm@linux-foundation.org>
To: jglisse@redhat.com
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
        Evgeny Baskakov <ebaskakov@nvidia.com>,
        Ralph Campbell <rcampbell@nvidia.com>,
        Mark Hairgrove <mhairgrove@nvidia.com>,
        John Hubbard <jhubbard@nvidia.com>
Subject: Re: [PATCH 04/15] mm/hmm: unregister mmu_notifier when last HMM
 client quit v3
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        <20180322013025.7008-1-jglisse@redhat.com>
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On Wed, 21 Mar 2018 21:30:25 -0400 jglisse@redhat.com wrote:

> This code was lost in translation at one point. This properly call
> mmu_notifier_unregister_no_release() once last user is gone. This
> fix the zombie mm_struct as without this patch we do not drop the
> refcount we have on it.

OK, I'm officially all messed up and confused ;) I'll await the next
full resend, please.