linux-kernel - Re: [PATCH 0/4] hugetlb: add hugepagesnid= command-line option

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Message-Id: <20140210151354.68fe414f81335d4ce0e4c550@linux-foundation.org>
Date:	Mon, 10 Feb 2014 15:13:54 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Luiz Capitulino <lcapitulino@...hat.com>
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	mtosatti@...hat.com, mgorman@...e.de, aarcange@...hat.com,
	andi@...stfloor.org, riel@...hat.com
Subject: Re: [PATCH 0/4] hugetlb: add hugepagesnid= command-line option

On Mon, 10 Feb 2014 12:27:44 -0500 Luiz Capitulino <lcapitulino@...hat.com> wrote:

> HugeTLB command-line option hugepages= allows the user to specify how many
> huge pages should be allocated at boot. On NUMA systems, this argument
> automatically distributes huge pages allocation among nodes, which can
> be undesirable.

Grumble.  "can be undesirable" is the entire reason for the entire
patchset.  We need far, far more detail than can be conveyed in three
words, please!

> The hugepagesnid= option introduced by this commit allows the user
> to specify which NUMA nodes should be used to allocate boot-time HugeTLB
> pages. For example, hugepagesnid=0,2,2G will allocate two 2G huge pages
> from node 0 only. More details on patch 3/4 and patch 4/4.
> 

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