linux-kernel - Re: [PATCH 04/15] mm/hmm: unregister mmu_notifier when last HMM client quit v3

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Date:   Thu, 22 Mar 2018 15:36:36 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     jglisse@...hat.com
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Evgeny Baskakov <ebaskakov@...dia.com>,
        Ralph Campbell <rcampbell@...dia.com>,
        Mark Hairgrove <mhairgrove@...dia.com>,
        John Hubbard <jhubbard@...dia.com>
Subject: Re: [PATCH 04/15] mm/hmm: unregister mmu_notifier when last HMM
 client quit v3

On Wed, 21 Mar 2018 21:30:25 -0400 jglisse@...hat.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.