On Sun, May 16, 2021 at 04:03:28PM +0100, Matthew Wilcox (Oracle) wrote:
> From: Christoph Hellwig <hch@xxxxxx>
>
> commit 1cea335d1db1ce6ab71b3d2f94a807112b738a0f upstream
>
> bio completions can race when a page spans more than one file system
> block. Add a spinlock to synchronize marking the page uptodate.
>
> Fixes: 9dc55f1389f9 ("iomap: add support for sub-pagesize buffered I/O without buffer heads")
> Reported-by: Jan Stancek <jstancek@xxxxxxxxxx>
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>
> Reviewed-by: Dave Chinner <dchinner@xxxxxxxxxx>
> Reviewed-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
> Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
> ---
> fs/iomap/buffered-io.c | 34 ++++++++++++++++++++++++----------
> include/linux/iomap.h | 1 +
> 2 files changed, 25 insertions(+), 10 deletions(-)
No s-o-b from you as you did the backport? :(
Anyway, what about a 4.19.y version?
thanks,
greg k-h
