Re: [f2fs-dev] [PATCH v5 10/16] f2fs: support partial uptodate large folio read

[Chao Yu via Linux-f2fs-devel <linux-f2fs-devel@lists.sourceforge.net>]

On 10/14/26 14:44, Nanzhe Zhao wrote:
> Buffered write can have write bytes smaller than folio
> size for cases when folio minimum order is not zero.
> This can left partially uptodate folio in page cache.
> So we skip uptodate subpage read in read_data_large_folio.
> Also mark hole subpage uptodate in uptodate bitmap.
> 
> Signed-off-by: Nanzhe Zhao <zhaonanzhe@xiaomi.com>
> ---
>   fs/f2fs/data.c | 88 +++++++++++++++++++++++++++++++++++++++++++++++++-
>   1 file changed, 87 insertions(+), 1 deletion(-)
> 
> diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
> index 59346b61615b..b9f2054f514f 100644
> --- a/fs/f2fs/data.c
> +++ b/fs/f2fs/data.c
> @@ -148,6 +148,7 @@ static void f2fs_finish_read_bio(struct bio *bio, bool in_task)
>   		struct folio *folio = fi.folio;
>   		unsigned nr_pages = fi.length >> PAGE_SHIFT;
>   		bool finished = true;
> +		bool uptodate = bio->bi_status == BLK_STS_OK;
>   
>   		if (!folio_test_large(folio) &&
>   		    f2fs_is_compressed_page(folio)) {
> @@ -163,6 +164,9 @@ static void f2fs_finish_read_bio(struct bio *bio, bool in_task)
>   				(struct f2fs_folio_state *)folio->private;
>   
>   			spin_lock_irqsave(&ffs->state_lock, flags);
> +			if (bio->bi_status == BLK_STS_OK)

if (uptodate)

Thanks,




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