On Thu, Jan 16, 2020 at 08:47:41AM -0800, Christoph Hellwig wrote: > 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: Ditto. Thanks for reviewing things! --D > Reviewed-by: Christoph Hellwig <hch@xxxxxx>
