linux-ext4 - Re: [PATCH 5/6] ocfs2: Wait for page writeback to provide stable pages

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Date:	Tue, 29 Jan 2013 17:03:57 -0800
From:	Joel Becker <jlbec@...lplan.org>
To:	"Darrick J. Wong" <darrick.wong@...cle.com>
Cc:	axboe@...nel.dk, lucho@...kov.net, jack@...e.cz, ericvh@...il.com,
	viro@...iv.linux.org.uk, rminnich@...dia.gov, tytso@....edu,
	martin.petersen@...cle.com, neilb@...e.de,
	Mark Fasheh <mfasheh@...e.com>, david@...morbit.com,
	gnehzuil.liu@...il.com, linux-kernel@...r.kernel.org,
	hch@...radead.org, linux-fsdevel@...r.kernel.org,
	adilger.kernel@...ger.ca, ocfs2-devel@....oracle.com,
	bharrosh@...asas.com, jlayton@...ba.org, akpm@...ux-foundation.org,
	linux-ext4@...r.kernel.org, hirofumi@...l.parknet.co.jp
Subject: Re: [PATCH 5/6] ocfs2: Wait for page writeback to provide stable
 pages

Acked-by: Joel Becker <jlbec@...lplan.org>

On Fri, Jan 18, 2013 at 05:13:08PM -0800, Darrick J. Wong wrote:
> When stable pages are required, we have to wait if the page is just
> going to disk and we want to modify it. Add proper callback to
> ocfs2_grab_pages_for_write().
> 
> CC: ocfs2-devel@....oracle.com
> CC: Joel Becker <jlbec@...lplan.org>
> CC: Mark Fasheh <mfasheh@...e.com>
> From: Jan Kara <jack@...e.cz>
> Signed-off-by: Jan Kara <jack@...e.cz>
> Signed-off-by: Darrick J. Wong <darrick.wong@...cle.com>
> ---
>  fs/ocfs2/aops.c |    1 +
>  1 file changed, 1 insertion(+)
> 
> 
> diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
> index 6577432..9796330 100644
> --- a/fs/ocfs2/aops.c
> +++ b/fs/ocfs2/aops.c
> @@ -1194,6 +1194,7 @@ static int ocfs2_grab_pages_for_write(struct address_space *mapping,
>  				goto out;
>  			}
>  		}
> +		wait_for_stable_page(wc->w_pages[i]);
>  
>  		if (index == target_index)
>  			wc->w_target_page = wc->w_pages[i];
> 

-- 

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			jlbec@...lplan.org
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