linux-kernel - Re: [PATCH -mm 1/7] mm: track free size between VMAs in VMA rbtree

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Date:	Thu, 21 Jun 2012 13:01:31 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Rik van Riel <riel@...hat.com>
Cc:	linux-mm@...ck.org, akpm@...ux-foundation.org, aarcange@...hat.com,
	minchan@...il.com, kosaki.motohiro@...il.com, andi@...stfloor.org,
	hannes@...xchg.org, mel@....ul.ie, linux-kernel@...r.kernel.org,
	Rik van Riel <riel@...riel.com>
Subject: Re: [PATCH -mm 1/7] mm: track free size between VMAs in VMA rbtree

On Mon, 2012-06-18 at 18:05 -0400, Rik van Riel wrote:
> +static void adjust_free_gap(struct vm_area_struct *vma)
> +{
> +       rb_augment_erase_end(&vma->vm_rb, vma_rb_augment_cb, NULL);
> +} 

This is a somewhat unorthodox usage of the rb_augment_erase_end()
function, at the very least that wants a comment.
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