Re: [PATCH 0/2] ntfs: handle block device cache flush in fsync paths

[Namjae Jeon]

On Tue, Oct 13, 2026 at 11:58 PM DaeMyung Kang <charsyam@xxxxxxxxx> wrote:
>
> Regular-file fsync currently ignores a block device cache flush failure,
> while directory fsync never issues a cache flush. Both can report success
> without ensuring that the data and metadata reached stable storage.
>
> The first patch returns and logs flush failures from regular-file fsync.
> The second adds a flush to directory fsync and reports its failure. The
> syncfs path already handles flush errors.
>
> QEMU blkdebug injected -EIO for flush_to_disk on ntfs-next at
> 04fb910da2c8. Before these changes, both file and directory fsync
> returned success while syncfs returned -EIO. With the respective fixes,
> both fsync calls return -EIO. A kretprobe confirmed the flush failures.
>
> DaeMyung Kang (2):
>   ntfs: report block device flush failures from fsync
>   ntfs: flush the block device when syncing a directory
Applied them to #ntfs-next.
Thanks!