On Sun, May 16, 2021 at 04:03:28PM +0100, Matthew Wilcox (Oracle) wrote:
From: Christoph Hellwig hch@lst.de
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@redhat.com Signed-off-by: Christoph Hellwig hch@lst.de Reviewed-by: Dave Chinner dchinner@redhat.com Reviewed-by: Darrick J. Wong darrick.wong@oracle.com Signed-off-by: Darrick J. Wong darrick.wong@oracle.com
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