linux-kernel - Re: [PATCH] f2fs: delete and free dirty dir freeing inode entry when sync dirty dir inodes

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Date:	Tue, 22 Oct 2013 20:15:44 +0900
From:	Jaegeuk Kim <jaegeuk.kim@...sung.com>
To:	Gu Zheng <guz.fnst@...fujitsu.com>
Cc:	f2fs <linux-f2fs-devel@...ts.sourceforge.net>,
	fsdevel <linux-fsdevel@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] f2fs: delete and free dirty dir freeing inode entry when
 sync dirty dir inodes

2013-10-21 (월), 15:19 +0800, Gu Zheng:
> In sync_dirty_dir_inodes(), remove_dirty_dir_inode() will be called
> in the callback of filemap_flush to delete and free dirty dir inode entry.
> But for the freeing inode entry, missed this step after sbumit data bio,
> and this may lead to a dead loop if these is freeing inode entry in
> dir_inode_list. So add the delete and free step to fix it.

Hi Gu,

This dirty inode will be removed by f2fs_evict_inode() after submitting
any pending bio, f2fs_submit_bio().
Thanks,

> 
> Signed-off-by: Gu Zheng <guz.fnst@...fujitsu.com>
> ---
>  fs/f2fs/checkpoint.c |    9 +++++++++
>  1 files changed, 9 insertions(+), 0 deletions(-)
> 
> diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
> index 8d16071..f61838f 100644
> --- a/fs/f2fs/checkpoint.c
> +++ b/fs/f2fs/checkpoint.c
> @@ -600,7 +600,16 @@ retry:
>  		 * wribacking dentry pages in the freeing inode.
>  		 */
>  		f2fs_submit_bio(sbi, DATA, true);
> +
> +		spin_lock(&sbi->dir_inode_lock);
> +		list_del(&entry->list);
> +#ifdef CONFIG_F2FS_STAT_FS
> +		sbi->n_dirty_dirs--;
> +#endif
> +		spin_unlock(&sbi->dir_inode_lock);
> +		kmem_cache_free(inode_entry_slab, entry);
>  	}
> +
>  	goto retry;
>  }
>  

-- 
Jaegeuk Kim
Samsung

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