Re: [PATCH v2] f2fs: fix retry logic in f2fs_write_cache_pages()

From: Chao Yu
Date: Wed Jun 03 2020 - 02:59:35 EST

On 2020/6/2 20:41, Sahitya Tummala wrote:
> In case a compressed file is getting overwritten, the current retry
> logic doesn't include the current page to be retried now as it sets
> the new start index as 0 and new end index as writeback_index - 1.
> This causes the corresponding cluster to be uncompressed and written
> as normal pages without compression. Fix this by allowing writeback to
> be retried for the current page as well (in case of compressed page
> getting retried due to index mismatch with cluster index). So that
> this cluster can be written compressed in case of overwrite.
> Also, align f2fs_write_cache_pages() according to the change -
> <64081362e8ff>("mm/page-writeback.c: fix range_cyclic writeback vs
> writepages deadlock").
> Signed-off-by: Sahitya Tummala <stummala@xxxxxxxxxxxxxx>

Reviewed-by: Chao Yu <yuchao0@xxxxxxxxxx>