linux-kernel - Re: [PATCH v2 1/9] mm/vmscan: add a comment about MADV_FREE pages check in folio_check_dirty

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Date:   Tue, 12 Apr 2022 11:15:17 +0800
From:   Miaohe Lin <linmiaohe@...wei.com>
To:     Christoph Hellwig <hch@...radead.org>
CC:     <akpm@...ux-foundation.org>, <ying.huang@...el.com>,
        <songmuchun@...edance.com>, <willy@...radead.org>,
        <linux-mm@...ck.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 1/9] mm/vmscan: add a comment about MADV_FREE pages
 check in folio_check_dirty_writeback

On 2022/4/11 22:16, Christoph Hellwig wrote:
> On Sat, Apr 09, 2022 at 05:34:52PM +0800, Miaohe Lin wrote:
>> The MADV_FREE pages check in folio_check_dirty_writeback is a bit hard to
>> follow. Add a comment to make the code clear.
>>
>> Suggested-by: Huang, Ying <ying.huang@...el.com>
>> Signed-off-by: Miaohe Lin <linmiaohe@...wei.com>
>> ---
>>  mm/vmscan.c | 3 +++
>>  1 file changed, 3 insertions(+)
>>
>> diff --git a/mm/vmscan.c b/mm/vmscan.c
>> index c77d5052f230..4a76be47bed1 100644
>> --- a/mm/vmscan.c
>> +++ b/mm/vmscan.c
>> @@ -1436,6 +1436,9 @@ static void folio_check_dirty_writeback(struct folio *folio,
>>  	/*
>>  	 * Anonymous pages are not handled by flushers and must be written
>>  	 * from reclaim context. Do not stall reclaim based on them
> 
> While you touch this please add a period at the end of the above
> sentence.

Will do.

> 
> Otherwise looks good:
> 
> Reviewed-by: Christoph Hellwig <hch@....de>

Many thanks for review!

> .
>