linux-kernel - Re: [f2fs-dev] [PATCH RESEND] f2fs: remove unneeded write checkpoint in recover_fsync

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Message-ID: <52416475.3090008@cn.fujitsu.com>
Date:	Tue, 24 Sep 2013 18:07:49 +0800
From:	Gu Zheng <guz.fnst@...fujitsu.com>
To:	Chao Yu <chao2.yu@...sung.com>
CC:	Kim Jaegeuk <jaegeuk.kim@...il.com>,
	linux-f2fs-devel@...ts.sourceforge.net,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	谭姝 <shu.tan@...sung.com>
Subject: Re: [f2fs-dev] [PATCH RESEND] f2fs: remove unneeded write checkpoint
 in recover_fsync_data

On 09/24/2013 09:26 AM, Chao Yu wrote:

> Previously, recover_fsync_data still to write checkpoint when there is
> nothing to recover with normal umount image.
> It may reduce mount performance and flash memory lifetime, so let's remove
> it.
> 
> Signed-off-by: Tan Shu <shu.tan@...sung.com>
> Signed-off-by: Yu Chao <chao2.yu@...sung.com>

Reviewed-by: Gu Zheng <guz.fnst@...fujitsu.com>

> ---
> fs/f2fs/recovery.c |    5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
> index 51ef5ee..d43e4cd 100644
> --- a/fs/f2fs/recovery.c
> +++ b/fs/f2fs/recovery.c
> @@ -419,6 +419,7 @@ int recover_fsync_data(struct f2fs_sb_info *sbi)
>  {
>  	struct list_head inode_list;
>  	int err;
> +	int need_writecp = 0;
>  
>  	fsync_entry_slab = f2fs_kmem_cache_create("f2fs_fsync_inode_entry",
>  			sizeof(struct fsync_inode_entry), NULL);
> @@ -436,6 +437,8 @@ int recover_fsync_data(struct f2fs_sb_info *sbi)
>  	if (list_empty(&inode_list))
>  		goto out;
>  
> +	need_writecp = 1;
> +
>  	/* step #2: recover data */
>  	err = recover_data(sbi, &inode_list, CURSEG_WARM_NODE);
>  	BUG_ON(!list_empty(&inode_list));
> @@ -443,7 +446,7 @@ out:
>  	destroy_fsync_dnodes(&inode_list);
>  	kmem_cache_destroy(fsync_entry_slab);
>  	sbi->por_doing = 0;
> -	if (!err)
> +	if (!err && need_writecp)
>  		write_checkpoint(sbi, false);
>  	return err;
>  }
> ---
> 
> --
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