Re: [f2fs-dev] [PATCH] f2fs: avoid inifinite loop to wait for flushing node pages at cp_error

[Chao Yu]

On 2020/5/22 22:47, Jaegeuk Kim wrote:
> Shutdown test is somtime hung, since dirty node pages weren't flushed out.
> Let's drop dirty pages at umount after shutdown.
> 
> Signed-off-by: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
> ---
>  fs/f2fs/node.c | 9 ++++++++-
>  1 file changed, 8 insertions(+), 1 deletion(-)
> 
> diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
> index e632de10aedab..8c63964a82fd0 100644
> --- a/fs/f2fs/node.c
> +++ b/fs/f2fs/node.c
> @@ -1520,8 +1520,15 @@ static int __write_node_page(struct page *page, bool atomic, bool *submitted,
>  
>  	trace_f2fs_writepage(page, NODE);
>  
> -	if (unlikely(f2fs_cp_error(sbi)))
> +	if (unlikely(f2fs_cp_error(sbi))) {
> +		if (is_sbi_flag_set(sbi, SBI_IS_CLOSE)) {
> +			dec_page_count(sbi, F2FS_DIRTY_NODES);
> +			up_read(&sbi->node_write);

We don't need to release node_write lock.

> +			unlock_page(page);
> +			return 0;
> +		}
>  		goto redirty_out;
> +	}
>  
>  	if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
>  		goto redirty_out;
>