linux-kernel - Re: [PATCH 4/4] hugetlb: add hugepages

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Message-Id: <20140221155423.6c6689e27fa10ed394f01843@linux-foundation.org>
Date:	Fri, 21 Feb 2014 15:54:23 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Davidlohr Bueso <davidlohr@...com>
Cc:	David Rientjes <rientjes@...gle.com>,
	Luiz Capitulino <lcapitulino@...hat.com>, mtosatti@...hat.com,
	Mel Gorman <mgorman@...e.de>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Andi Kleen <andi@...stfloor.org>,
	Rik van Riel <riel@...hat.com>,
	isimatu.yasuaki@...fujitsu.com, yinghai@...nel.org,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH 4/4] hugetlb: add hugepages_node= command-line option

On Mon, 17 Feb 2014 21:47:36 -0800 Davidlohr Bueso <davidlohr@...com> wrote:

> > How is that difficult?  hugepages= is the "noun", hugepagesz= is the 
> > "adjective".  hugepages=100 hugepagesz=1G hugepages=4 makes perfect sense 
> > to me, and I actually don't allocate hugepages on the command line, nor 
> > have I looked at Documentation/kernel-parameters.txt to check if I'm 
> > constructing it correctly.  It just makes sense and once you learn it it's 
> > just natural.
> 
> This can get annoying _really_ fast for larger systems.

Yes, I do prefer the syntax Luiz is proposing.

But I think it would be better if it made hugepages= and hugepagesz=
obsolete, so we can emit a printk if people use those, telling them
to migrate because the old options are going away.

Something like

	hugepages_node=1:4:1G

and

	hugepages_node=:16:1G

?
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