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Date: Mon, 10 Jul 2017 18:15:53 +0300
From: Igor Stoppa <igor.stoppa@...wei.com>
To: Jerome Glisse <jglisse@...hat.com>
CC: <keescook@...omium.org>, <mhocko@...nel.org>, <jmorris@...ei.org>,
        <labbott@...hat.com>, <hch@...radead.org>,
        <penguin-kernel@...ove.SAKURA.ne.jp>, <paul@...l-moore.com>,
        <sds@...ho.nsa.gov>, <casey@...aufler-ca.com>,
        <linux-security-module@...r.kernel.org>, <linux-mm@...ck.org>,
        <linux-kernel@...r.kernel.org>, <kernel-hardening@...ts.openwall.com>
Subject: Re: [PATCH 1/3] Protectable memory support

On 07/07/17 21:48, Jerome Glisse wrote:

> I believe there is enough unuse field that for vmalloc pages that
> you should find one you can use. Just add some documentation in
> mm_types.h so people are aware of alternate use for the field you
> are using.


I ended up using page->private and the corresponding bit.
Because page-private is an opaque field, specifically reserved for the
allocator, I think it should not be necessary to modify mm_types.h

The reworked patch is here:
https://marc.info/?l=linux-mm&m=149969928920772&w=2

--
thanks, igor

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