linux-kernel - Re: [patch] mm, hugetlb: generalize writes to nr

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Date:	Wed, 02 Jul 2014 19:04:42 -0700
From:	Davidlohr Bueso <davidlohr@...com>
To:	David Rientjes <rientjes@...gle.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Joonsoo Kim <iamjoonsoo.kim@....com>,
	Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
	Luiz Capitulino <lcapitulino@...hat.com>,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [patch] mm, hugetlb: generalize writes to nr_hugepages

On Mon, 2014-06-30 at 16:57 -0700, David Rientjes wrote:
> Three different interfaces alter the maximum number of hugepages for an
> hstate:
> 
>  - /proc/sys/vm/nr_hugepages for global number of hugepages of the default
>    hstate,
> 
>  - /sys/kernel/mm/hugepages/hugepages-X/nr_hugepages for global number of
>    hugepages for a specific hstate, and
> 
>  - /sys/kernel/mm/hugepages/hugepages-X/nr_hugepages/mempolicy for number of
>    hugepages for a specific hstate over the set of allowed nodes.
> 
> Generalize the code so that a single function handles all of these writes 
> instead of duplicating the code in two different functions.
> 
> This decreases the number of lines of code, but also reduces the size of
> .text by about half a percent since set_max_huge_pages() can be inlined.
> 
> Signed-off-by: David Rientjes <rientjes@...gle.com>

Acked-by: Davidlohr Bueso <davidlohr@...com>

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