linux-kernel - Re: [PATCH] mm: do

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Message-ID: <52A1260B.2050007@huawei.com>
Date:	Fri, 6 Dec 2013 09:19:07 +0800
From:	Jianguo Wu <wujianguo@...wei.com>
To:	Naoya Horiguchi <n-horiguchi@...jp.nec.com>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	Johannes Weiner <hannes@...xchg.org>,
	Minchan Kim <minchan.kim@...il.com>, <linux-mm@...ck.org>,
	<linux-kernel@...r.kernel.org>, qiuxishi <qiuxishi@...wei.com>
Subject: Re: [PATCH] mm: do_mincore() cleanup

On 2013/12/5 22:39, Naoya Horiguchi wrote:

> On Thu, Dec 05, 2013 at 04:52:52PM +0800, Jianguo Wu wrote:
>> Two cleanups:
>> 1. remove redundant codes for hugetlb pages.
>> 2. end = pmd_addr_end(addr, end) restricts [addr, end) within PMD_SIZE,
>>    this may increase do_mincore() calls, remove it.
>>
>> Signed-off-by: Jianguo Wu <wujianguo@...wei.com>
> 
> Reviewed-by: Naoya Horiguchi <n-horiguchi@...jp.nec.com>

Hi Naoya, thanks for your review!

Jianguo Wu

> 
> Thanks!
> 
> Naoya
> 
>> ---
>>  mm/mincore.c |    7 -------
>>  1 files changed, 0 insertions(+), 7 deletions(-)
>>
>> diff --git a/mm/mincore.c b/mm/mincore.c
>> index da2be56..1016233 100644
>> --- a/mm/mincore.c
>> +++ b/mm/mincore.c
>> @@ -225,13 +225,6 @@ static long do_mincore(unsigned long addr, unsigned long pages, unsigned char *v
>>  
>>  	end = min(vma->vm_end, addr + (pages << PAGE_SHIFT));
>>  
>> -	if (is_vm_hugetlb_page(vma)) {
>> -		mincore_hugetlb_page_range(vma, addr, end, vec);
>> -		return (end - addr) >> PAGE_SHIFT;
>> -	}
>> -
>> -	end = pmd_addr_end(addr, end);
>> -
>>  	if (is_vm_hugetlb_page(vma))
>>  		mincore_hugetlb_page_range(vma, addr, end, vec);
>>  	else
>> -- 
>> 1.7.1
>>
>>
>> --
>> To unsubscribe, send a message with 'unsubscribe linux-mm' in
>> the body to majordomo@...ck.org.  For more info on Linux MM,
>> see: http://www.linux-mm.org/ .
>> Don't email: <a href=mailto:"dont@...ck.org"> email@...ck.org </a>
>>
> 
> .
> 



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