linux-kernel - Re: [PATCH 3/3] mm: remove function free_hot

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Message-ID: <3a3680031001130807nafe1246u141438935fe5fab@mail.gmail.com>
Date:	Thu, 14 Jan 2010 00:07:19 +0800
From:	Li Hong <lihong.hi@...il.com>
To:	Américo Wang <xiyou.wangcong@...il.com>
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Eduard - Gabriel Munteanu <eduard.munteanu@...ux360.ro>
Subject: Re: [PATCH 3/3] mm: remove function free_hot_page

I just think it is needless to add a simple wrap function here whether
it is inlined
or not.

-LH

2010/1/13 Américo Wang <xiyou.wangcong@...il.com>:
> On Wed, Jan 13, 2010 at 10:54:50PM +0800, Li Hong wrote:
>>Now fuction 'free_hot_page' is just a wrap of ' free_hot_cold_page' with
>>parameter 'cold = 0'. After adding a clear comment for 'free_hot_cold_page', it
>>is reasonable to remove a level of call.
>
> How? The compiler can certainly inline it.
>
>>
>>Signed-off-by: Li Hong <lihong.hi@...il.com>
>>---
>> mm/page_alloc.c |    8 ++------
>> mm/swap.c       |    2 +-
>> 2 files changed, 3 insertions(+), 7 deletions(-)
>>
>>diff --git a/mm/page_alloc.c b/mm/page_alloc.c
>>index 175dd36..c88e03d 100644
>>--- a/mm/page_alloc.c
>>+++ b/mm/page_alloc.c
>>@@ -1073,6 +1073,7 @@ void mark_free_pages(struct zone *zone)
>>
>> /*
>>  * Free a 0-order page
>>+ * cold == 1 ? free a cold page : free a hot page
>>  */
>> static void free_hot_cold_page(struct page *page, int cold)
>> {
>>@@ -1135,11 +1136,6 @@ out:
>>        put_cpu();
>> }
>>
>>-void free_hot_page(struct page *page)
>>-{
>>-       free_hot_cold_page(page, 0);
>>-}
>>-
>> /*
>>  * split_page takes a non-compound higher-order page, and splits it into
>>  * n (1<<order) sub-pages: page[0..n]
>>@@ -2014,7 +2010,7 @@ void __free_pages(struct page *page, unsigned int order)
>> {
>>        if (put_page_testzero(page)) {
>>                if (order == 0)
>>-                       free_hot_page(page);
>>+                       free_hot_cold_page(page, 0);
>>                else
>>                        __free_pages_ok(page, order);
>>        }
>>diff --git a/mm/swap.c b/mm/swap.c
>>index 308e57d..9036b89 100644
>>--- a/mm/swap.c
>>+++ b/mm/swap.c
>>@@ -55,7 +55,7 @@ static void __page_cache_release(struct page *page)
>>                del_page_from_lru(zone, page);
>>                spin_unlock_irqrestore(&zone->lru_lock, flags);
>>        }
>>-       free_hot_page(page);
>>+       free_hot_cold_page(page, 0);
>> }
>>
>> static void put_compound_page(struct page *page)
>>--
>>1.6.3.3
>>--
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>
> --
> Live like a child, think like the god.
>
>
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