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Date: Thu, 17 May 2018 04:53:27 -0700
From: Matthew Wilcox <willy@infradead.org>
Subject: Re: [RFC v3 PATCH 1/5] mm/page_alloc: use helper functions to
 add/remove a page to/from buddy
Message-ID: <20180517115327.GB26689@bombadil.infradead.org>
References: <20180509085450.3524-1-aaron.lu@intel.com>
 <20180509085450.3524-2-aaron.lu@intel.com>
 <20180517114821.GA26689@bombadil.infradead.org>
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To: Aaron Lu <aaron.lu@intel.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Andrew Morton <akpm@linux-foundation.org>, Huang Ying <ying.huang@intel.com>, Dave Hansen <dave.hansen@linux.intel.com>, Kemi Wang <kemi.wang@intel.com>, Tim Chen <tim.c.chen@linux.intel.com>, Andi Kleen <ak@linux.intel.com>, Michal Hocko <mhocko@suse.com>, Vlastimil Babka <vbabka@suse.cz>, Mel Gorman <mgorman@techsingularity.net>, Daniel Jordan <daniel.m.jordan@oracle.com>, Tariq Toukan <tariqt@mellanox.com>

On Thu, May 17, 2018 at 04:48:21AM -0700, Matthew Wilcox wrote:
> On Wed, May 09, 2018 at 04:54:46PM +0800, Aaron Lu wrote:
> > +static inline void add_to_buddy_head(struct page *page, struct zone *zone,
> > +					unsigned int order, int mt)
> > +{
> > +	add_to_buddy_common(page, zone, order);
> > +	list_add(&page->lru, &zone->free_area[order].free_list[mt]);
> > +}
> 
> Isn't this function (and all of its friends) misnamed?  We're not adding
> this page to the buddy allocator, we're adding it to the freelist.  It
> doesn't go to the buddy allocator until later, if at all.

No, never mind, I misunderstood.  Ignore this please.