linux-kernel - Re: [PATCH 4/4] mm,hugetlb: compute page_size

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Message-ID: <20170222161128.ai4dyktyjog7kvw7@dhcp22.suse.cz>
Date:   Wed, 22 Feb 2017 17:11:28 +0100
From:   Michal Hocko <mhocko@...nel.org>
To:     Davidlohr Bueso <dave@...olabs.net>
Cc:     akpm@...ux-foundation.org, manfred@...orfullife.com,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        Davidlohr Bueso <dbueso@...e.de>
Subject: Re: [PATCH 4/4] mm,hugetlb: compute page_size_log properly

On Wed 22-02-17 08:03:19, Davidlohr Bueso wrote:
> On Mon, 20 Feb 2017, Michal Hocko wrote:
> 
> > I am not sure I understand.
> > $ git grep SHM_HUGE_ include/uapi/
> > $
> > 
> > So there doesn't seem to be any user visible constant. The man page
> > mentiones is but I do not really see how is the userspace supposed to
> > use it.
> 
> Yeah, userspace is not supposed to use it, it's just there because
> the manpage describes kernel internals.

Which is wrong!

> I'm not really a big fan
> of touching manpages (and ipc is already full of corner cases),
> but I guess nobody can really complain if we rip out all the
> SHM_HUGE_ stuff.

yeah, let's just get rid of it.
-- 
Michal Hocko
SUSE Labs