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From:   Liam Howlett <liam.howlett@oracle.com>
To:     Michel Lespinasse <michel@lespinasse.org>
CC:     "maple-tree@lists.infradead.org" <maple-tree@lists.infradead.org>,
        "linux-mm@kvack.org" <linux-mm@kvack.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Song Liu <songliubraving@fb.com>,
        Davidlohr Bueso <dave@stgolabs.net>,
        "Paul E . McKenney" <paulmck@kernel.org>,
        Matthew Wilcox <willy@infradead.org>,
        Laurent Dufour <ldufour@linux.ibm.com>,
        David Rientjes <rientjes@google.com>,
        Axel Rasmussen <axelrasmussen@google.com>,
        Suren Baghdasaryan <surenb@google.com>,
        Vlastimil Babka <vbabka@suse.cz>,
        Rik van Riel <riel@surriel.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Michel Lespinasse <walken.cr@gmail.com>
Subject: Re: [PATCH 94/94] mm: Move mas locking outside of munmap() path.
Thread-Topic: [PATCH 94/94] mm: Move mas locking outside of munmap() path.
Thread-Index: AQHXPERDRfg+Yjl5x0SvTuH2bZDirarOKbOAgAPJ7wA=
Date:   Mon, 3 May 2021 16:05:09 +0000
Message-ID: <20210503160456.avsjwschcfua7uzy@revolver>
References: <20210428153542.2814175-1-Liam.Howlett@Oracle.com>
 <20210428153542.2814175-95-Liam.Howlett@Oracle.com>
 <20210501061335.GD5188@lespinasse.org>
In-Reply-To: <20210501061335.GD5188@lespinasse.org>
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* Michel Lespinasse <michel@lespinasse.org> [210501 02:13]:
> On Wed, Apr 28, 2021 at 03:36:32PM +0000, Liam Howlett wrote:
> > Now that there is a split variant that allows splitting to use a maple =
state,
> > move the locks to a more logical position.
>=20
> In this patch set, is the maple tree lock ever held outside of code
> sections already protected by the mmap write lock ?


No, the maple tree lock is a currently a subset of the mmap write lock.

Thanks,
Liam=