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Date: Fri, 21 Aug 2015 08:53:21 +0200
From: Michal Hocko <mhocko@kernel.org>
To: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
        David Rientjes <rientjes@google.com>,
        =?iso-8859-1?Q?J=F6rn?= Engel <joern@purestorage.com>,
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        "linux-mm@kvack.org" <linux-mm@kvack.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Naoya Horiguchi <nao.horiguchi@gmail.com>
Subject: Re: [PATCH v5 2/2] mm: hugetlb: proc: add HugetlbPages field to
 /proc/PID/status
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On Thu 20-08-15 23:34:51, Naoya Horiguchi wrote:
[...]
> > Reading a single file is, of course, easier but is it really worth the
> > additional code? I haven't really looked at the patch so I might be
> > missing something but what would be an advantage over reading
> > /proc/<pid>/smaps and extracting the information from there?
> 
> My first idea was just "users should feel it useful", but permission as David
> commented sounds a good technical reason to me.

9 files changed, 112 insertions(+), 1 deletion(-)

is quite a lot especially when it touches hot paths like fork so it
better should have a good usecase. I have already asked in the other
email but is actually anybody requesting this? Nice to have is not
a good justification IMO.
-- 
Michal Hocko
SUSE Labs
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