On Wed, Jan 15, 2020 at 10:15:50PM -0800, Darrick J. Wong wrote: > From: Darrick J. Wong <darrick.wong@xxxxxxxxxx> > > When writing to a delalloc region in the data fork, commit the new > allocations (of the da reservation) as unwritten so that the mappings > are only marked written once writeback completes successfully. This > fixes the problem of stale data exposure if the system goes down during > targeted writeback of a specific region of a file, as tested by > generic/042. I think this is the only safe way to deal with buffered I/O into holes, so: Reviewed-by: Christoph Hellwig <hch@xxxxxx>
