linux-kernel - Re: [PATCH 11/13] mm: meminit: Free pages in large chunks where possible

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Message-Id: <20150427154356.67e3d186b732a2c2b00e49cb@linux-foundation.org>
Date:	Mon, 27 Apr 2015 15:43:56 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Mel Gorman <mgorman@...e.de>
Cc:	Linux-MM <linux-mm@...ck.org>, Nathan Zimmer <nzimmer@....com>,
	Dave Hansen <dave.hansen@...el.com>,
	Waiman Long <waiman.long@...com>,
	Scott Norton <scott.norton@...com>,
	Daniel J Blueman <daniel@...ascale.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 11/13] mm: meminit: Free pages in large chunks where
 possible

On Thu, 23 Apr 2015 11:33:14 +0100 Mel Gorman <mgorman@...e.de> wrote:

> Parallel struct page frees pages one at a time. Try free pages as single
> large pages where possible.
> 
> ...
>
>  void __defermem_init deferred_init_memmap(int nid)

This function is gruesome in an 80-col display.  Even the code comments
wrap, which is nuts.  Maybe hoist the contents of the outermost loop
into a separate function, called for each zone?
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