linux-kernel - Re: [PATCH RFC 0/7] mm: PG_reserved cleanups and documentation

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Message-ID: <dd8ed63e-a296-ee2c-52d2-db6d8247f710@redhat.com>
Date:   Wed, 5 Dec 2018 14:04:21 +0100
From:   David Hildenbrand <david@...hat.com>
To:     Michal Hocko <mhocko@...nel.org>
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-m68k@...ts.linux-m68k.org, linuxppc-dev@...ts.ozlabs.org,
        linux-riscv@...ts.infradead.org, linux-s390@...r.kernel.org,
        linux-mediatek@...ts.infradead.org,
        Albert Ou <aou@...s.berkeley.edu>,
        Alexander Duyck <alexander.h.duyck@...ux.intel.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Anthony Yznaga <anthony.yznaga@...cle.com>,
        Arnd Bergmann <arnd@...db.de>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Bhupesh Sharma <bhsharma@...hat.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Christophe Leroy <christophe.leroy@....fr>,
        Dan Williams <dan.j.williams@...el.com>,
        Dave Kleikamp <dave.kleikamp@...cle.com>,
        David Airlie <airlied@...ux.ie>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        James Morse <james.morse@....com>,
        Kees Cook <keescook@...omium.org>,
        Marc Zyngier <marc.zyngier@....com>,
        Mark Rutland <mark.rutland@....com>,
        Martin Schwidefsky <schwidefsky@...ibm.com>,
        Matthew Wilcox <willy@...radead.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Mike Rapoport <rppt@...ux.vnet.ibm.com>,
        Miles Chen <miles.chen@...iatek.com>,
        Palmer Dabbelt <palmer@...ive.com>,
        Paul Mackerras <paulus@...ba.org>,
        Pavel Tatashin <pasha.tatashin@...cle.com>,
        Souptick Joarder <jrdr.linux@...il.com>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Tobias Klauser <tklauser@...tanz.ch>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Will Deacon <will.deacon@....com>
Subject: Re: [PATCH RFC 0/7] mm: PG_reserved cleanups and documentation

On 05.12.18 13:56, Michal Hocko wrote:
> On Wed 05-12-18 13:28:44, David Hildenbrand wrote:
> [...]
>> Most notably, for device memory we can hopefully soon stop setting
>> it PG_reserved
> 
> I am busy as hell so I am not likely to look at specific patche this
> week. But could you be more specific why we need to get rid of other
> PG_reserved users before we can do so for device memory?
> 

No worries, this has time.

For device memory, nothing should really be needed. I am only collecting
and docuumenting users and this is one user soon to go (eventually) :)

> I am all for removing relicts because they just confuse people but I
> fail to see any relation here.
> 

It's really only "why is this patch set not bigger", nothing related to
device memory actually :)

-- 

Thanks,

David / dhildenb