linux-kernel - Re: [PATCH v5 0/5] mm: introduce memfd_secret system call to create "secret" memory areas

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Message-ID: <20200917060052.GN2142832@kernel.org>
Date:   Thu, 17 Sep 2020 09:00:52 +0300
From:   Mike Rapoport <rppt@...nel.org>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Alexander Viro <viro@...iv.linux.org.uk>,
        Andy Lutomirski <luto@...nel.org>,
        Arnd Bergmann <arnd@...db.de>, Borislav Petkov <bp@...en8.de>,
        Catalin Marinas <catalin.marinas@....com>,
        Christopher Lameter <cl@...ux.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        David Hildenbrand <david@...hat.com>,
        Elena Reshetova <elena.reshetova@...el.com>,
        "H. Peter Anvin" <hpa@...or.com>, Idan Yaniv <idan.yaniv@....com>,
        Ingo Molnar <mingo@...hat.com>,
        James Bottomley <jejb@...ux.ibm.com>,
        "Kirill A. Shutemov" <kirill@...temov.name>,
        Matthew Wilcox <willy@...radead.org>,
        Mark Rutland <mark.rutland@....com>,
        Mike Rapoport <rppt@...ux.ibm.com>,
        Michael Kerrisk <mtk.manpages@...il.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Tycho Andersen <tycho@...ho.ws>, Will Deacon <will@...nel.org>,
        linux-api@...r.kernel.org, linux-arch@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-fsdevel@...r.kernel.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, linux-nvdimm@...ts.01.org,
        linux-riscv@...ts.infradead.org, x86@...nel.org
Subject: Re: [PATCH v5 0/5] mm: introduce memfd_secret system call to create
 "secret" memory areas

On Wed, Sep 16, 2020 at 04:20:20PM -0700, Andrew Morton wrote:
> On Wed, 16 Sep 2020 10:35:34 +0300 Mike Rapoport <rppt@...nel.org> wrote:
> 
> > This is an implementation of "secret" mappings backed by a file descriptor. 
> > I've dropped the boot time reservation patch for now as it is not strictly
> > required for the basic usage and can be easily added later either with or
> > without CMA.
> 
> It seems early days for this, especially as regards reviewer buyin. 
> But I'll toss it in there to get it some additional testing.

Thanks!

> A test suite in tools/testging/selftests/ would be helpful, especially
> for arch maintainers.

I'll look into it.

> I assume that user-facing manpage alterations are planned?

Of course.

-- 
Sincerely yours,
Mike.