linux-kernel - Re: [RFC 2/4] Deactivate mmap

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Date:   Wed, 19 Apr 2017 14:30:51 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Laurent Dufour <ldufour@...ux.vnet.ibm.com>
Cc:     linux-mm@...ck.org, Davidlohr Bueso <dave@...olabs.net>,
        akpm@...ux-foundation.org, Jan Kara <jack@...e.cz>,
        "Kirill A . Shutemov" <kirill@...temov.name>,
        Michal Hocko <mhocko@...nel.org>,
        Mel Gorman <mgorman@...hsingularity.net>,
        haren@...ux.vnet.ibm.com, aneesh.kumar@...ux.vnet.ibm.com,
        khandual@...ux.vnet.ibm.com, Paul.McKenney@...ibm.com,
        linux-kernel@...r.kernel.org
Subject: Re: [RFC 2/4] Deactivate mmap_sem assert

On Wed, Apr 19, 2017 at 02:18:25PM +0200, Laurent Dufour wrote:
> When mmap_sem will be moved to a range lock, some assertion done in
> the code are no more valid, like the one ensuring mmap_sem is held.
> 

Why are they no longer valid?