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.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
}
blocksize = sbuf.st_blksize;
- ret = posix_memalign((void **)&buf, blocksize, blocksize);
+ ret = posix_memalign((void **)&buf, sysconf(_SC_PAGESIZE), blocksize);
if (ret) {
errno = ret;
perror("buffer");