Re: [PATCH 08/21] iomap: Add iomap_invalidate_folio

Darrick J. Wong
2021-11-02T22:36:42Z

On Mon, Nov 01, 2021 at 08:39:16PM +0000, Matthew Wilcox (Oracle) wrote:
> Keep iomap_invalidatepage around as a wrapper for use in address_space
> operations.
>
> Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>

Looks ok,
Reviewed-by: Darrick J. Wong <djwong@kernel.org>

--D

> ---
> fs/iomap/buffered-io.c | 20 ++++++++++++--------
> include/linux/iomap.h | 1 +
> 2 files changed, 13 insertions(+), 8 deletions(-)
>
> diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
> index a6b64a1ad468..e9a60520e769 100644
> --- a/fs/iomap/buffered-io.c
> +++ b/fs/iomap/buffered-io.c
> @@ -468,23 +468,27 @@ iomap_releasepage(struct page *page, gfp_t gfp_mask)
> }
> EXPORT_SYMBOL_GPL(iomap_releasepage);
>
> -void
> -iomap_invalidatepage(struct page *page, unsigned int offset, unsigned int len)
> +void iomap_invalidate_folio(struct folio *folio, size_t offset, size_t len)
> {
> - struct folio *folio = page_folio(page);
> -
> - trace_iomap_invalidatepage(page->mapping->host, offset, len);
> + trace_iomap_invalidatepage(folio->mapping->host, offset, len);
>
> /*
> * If we're invalidating the entire page, clear the dirty state from it
> * and release it to avoid unnecessary buildup of the LRU.
> */
> - if (offset == 0 && len == PAGE_SIZE) {
> - WARN_ON_ONCE(PageWriteback(page));
> - cancel_dirty_page(page);
> + if (offset == 0 && len == folio_size(folio)) {
> + WARN_ON_ONCE(folio_test_writeback(folio));
> + folio_cancel_dirty(folio);
> iomap_page_release(folio);
> }
> }
> +EXPORT_SYMBOL_GPL(iomap_invalidate_folio);
> +
> +void iomap_invalidatepage(struct page *page, unsigned int offset,
> + unsigned int len)
> +{
> + iomap_invalidate_folio(page_folio(page), offset, len);
> +}
> EXPORT_SYMBOL_GPL(iomap_invalidatepage);
>
> #ifdef CONFIG_MIGRATION
> diff --git a/include/linux/iomap.h b/include/linux/iomap.h
> index 63f4ea4dac9b..91de58ca09fc 100644
> --- a/include/linux/iomap.h
> +++ b/include/linux/iomap.h
> @@ -225,6 +225,7 @@ void iomap_readahead(struct readahead_control *, const struct iomap_ops *ops);
> int iomap_is_partially_uptodate(struct page *page, unsigned long from,
> unsigned long count);
> int iomap_releasepage(struct page *page, gfp_t gfp_mask);
> +void iomap_invalidate_folio(struct folio *folio, size_t offset, size_t len);
> void iomap_invalidatepage(struct page *page, unsigned int offset,
> unsigned int len);
> #ifdef CONFIG_MIGRATION
> --
> 2.33.0
>