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Subject: Re: [PATCH] mm: make transparent hugepage size public
References: <alpine.LSU.2.11.1612052200290.13021@eggly.anvils>
 <877f7difx1.fsf@linux.vnet.ibm.com>
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 <20161206171905.n7qwvfb5sjxn3iif@black.fi.intel.com>
From: Dave Hansen <dave.hansen@intel.com>
Message-ID: <db569a60-5dd1-b0a8-9fcb-6dd2106765ee@intel.com>
Date: Tue, 6 Dec 2016 11:27:28 -0800
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To: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>, Hugh Dickins <hughd@google.com>, Andrew Morton <akpm@linux-foundation.org>, Greg Thelen <gthelen@google.com>, David Rientjes <rientjes@google.com>, Andrea Arcangeli <aarcange@redhat.com>, Dan Williams <dan.j.williams@intel.com>, Jan Kara <jack@suse.cz>, linux-mm@kvack.org

On 12/06/2016 09:19 AM, Kirill A. Shutemov wrote:
>>> > > We have in /proc/meminfo
>>> > > 
>>> > > Hugepagesize:       2048 kB
>>> > > 
>>> > > Does it makes it easy for application to find THP page size also there ?
>> > 
>> > Nope.  That's the default hugetlbfs page size.  Even on x86, that can be
>> > changed and _could_ be 1G.  If hugetlbfs is configured out, you also
>> > won't get this in meminfo.
> I think Aneesh propose to add one more line into the file.

Ahhh, ok...

Personally, I think Hugh did the right things.  There's no reason to
waste cycles sticking a number in meminfo that never changes.

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