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Date:   Tue, 13 Mar 2018 15:00:40 -0700
From:   Matthew Wilcox <willy@infradead.org>
To:     Igor Stoppa <igor.stoppa@huawei.com>
Cc:     david@fromorbit.com, rppt@linux.vnet.ibm.com,
        keescook@chromium.org, mhocko@kernel.org, labbott@redhat.com,
        linux-security-module@vger.kernel.org, linux-mm@kvack.org,
        linux-kernel@vger.kernel.org, kernel-hardening@lists.openwall.com
Subject: Re: [PATCH 4/8] struct page: add field for vm_struct
Message-ID: <20180313220040.GA15791@bombadil.infradead.org>
References: <20180313214554.28521-1-igor.stoppa@huawei.com>
 <20180313214554.28521-5-igor.stoppa@huawei.com>
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On Tue, Mar 13, 2018 at 11:45:50PM +0200, Igor Stoppa wrote:
> When a page is used for virtual memory, it is often necessary to obtain
> a handler to the corresponding vm_struct, which refers to the virtually
> continuous area generated when invoking vmalloc.
> 
> The struct page has a "mapping" field, which can be re-used, to store a
> pointer to the parent area.
> 
> This will avoid more expensive searches, later on.
> 
> Signed-off-by: Igor Stoppa <igor.stoppa@huawei.com>

Reviewed-by: Matthew Wilcox <mawilcox@microsoft.com>

Regardless of the fate of the rest of this patchset, this makes sense
and we should have this.