linux-kernel - Re: [RFC v9 PATCH 2/4] mm: mmap: zap pages with read mmap

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Message-ID: <20180911211645.GA12159@bombadil.infradead.org>
Date:   Tue, 11 Sep 2018 14:16:45 -0700
From:   Matthew Wilcox <willy@...radead.org>
To:     Yang Shi <yang.shi@...ux.alibaba.com>
Cc:     mhocko@...nel.org, ldufour@...ux.vnet.ibm.com, vbabka@...e.cz,
        akpm@...ux-foundation.org, dave.hansen@...el.com, oleg@...hat.com,
        srikar@...ux.vnet.ibm.com, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [RFC v9 PATCH 2/4] mm: mmap: zap pages with read mmap_sem in
 munmap

On Wed, Sep 12, 2018 at 04:58:11AM +0800, Yang Shi wrote:
>  mm/mmap.c | 97 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++--

I really think you're going about this the wrong way by duplicating
vm_munmap().