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References: <20190909204201.931830-1-arnd@arndb.de> <20190910071030.GG2063@dhcp22.suse.cz>
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From:   Arnd Bergmann <arnd@arndb.de>
Date:   Tue, 10 Sep 2019 09:31:09 +0200
Message-ID: <CAK8P3a2_nuy-nxYapRbkZfAa+xABGUSPekEOwTunu4G-=V2cCA@mail.gmail.com>
Subject: Re: [PATCH] mm: add dummy can_do_mlock() helper
To:     Michal Hocko <mhocko@kernel.org>
Cc:     Andrew Morton <akpm@linux-foundation.org>,
        Linux-MM <linux-mm@kvack.org>,
        linux-rdma <linux-rdma@vger.kernel.org>,
        Jason Gunthorpe <jgg@mellanox.com>,
        Bernard Metzler <bmt@zurich.ibm.com>,
        "Matthew Wilcox (Oracle)" <willy@infradead.org>,
        "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
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On Tue, Sep 10, 2019 at 9:10 AM Michal Hocko <mhocko@kernel.org> wrote:

> but IB on nonMMU? Whut? Is there any HW that actually supports this?
> Just wondering...

Probably not, but I can't think of a good reason to completely disable
it in Kconfig.
Almost everything can be built without MMU at the moment, but the subset
of things that are actually useful is hard to know.

         Arnd