linux-kernel - Re: [PATCH 13/19] f2fs: fix return value of releasepage for node and data

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Message-ID: <CAKYAXd9qmaJksB9cOYGBpGb6h4mdQj7J-OwWttRprps8=i0RKA@mail.gmail.com>
Date:	Mon, 18 Mar 2013 20:39:17 +0900
From:	Namjae Jeon <linkinjeon@...il.com>
To:	Jaegeuk Kim <jaegeuk.kim@...sung.com>
Cc:	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-f2fs-devel@...ts.sourceforge.net
Subject: Re: [PATCH 13/19] f2fs: fix return value of releasepage for node and data

2013/3/18, Jaegeuk Kim <jaegeuk.kim@...sung.com>:
> If the return value of releasepage is equal to zero, the page cannot be
> reclaimed.
> Instead, we should return 1 in order to reclaim clean pages.
>
> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@...sung.com>
> ---
>  fs/f2fs/data.c |  4 +++-
>  fs/f2fs/node.c | 13 +++----------
>  2 files changed, 6 insertions(+), 11 deletions(-)
>
> diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
> index 6616137..cd6b2cc 100644
> --- a/fs/f2fs/data.c
> +++ b/fs/f2fs/data.c
> @@ -680,8 +680,10 @@ static void f2fs_invalidate_data_page(struct page
> *page, unsigned long offset)
>
>  static int f2fs_release_data_page(struct page *page, gfp_t wait)
>  {
> +	if (PageWriteback(page))
> +		return 0;
>  	ClearPagePrivate(page);
> -	return 0;
> +	return 1;
>  }
I have a question.
Although PageWriteback is already checked in try_to_release_page,
we need to check it again in f2fs_release_data_page ?

Thanks.


> 1.8.1.3.566.gaa39828
>
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