On Wed, May 19, 2021 at 04:57:16PM -0700, Darrick J. Wong wrote: > From: Darrick J. Wong <djwong@xxxxxxxxxx> > > This program fails on filesystems where the stat() block size isn't a > strict power of two because it foolishly feeds that to posix_memalign to > allocate an aligned memory buffer for directio. posix_memalign requires > the alignment value to be a power of two, so generic/586 fails. > > The system page size generally works well for directio buffers, so use > that instead. Looks good, Reviewed-by: Christoph Hellwig <hch@xxxxxx>