Hi, I've run into a verify issue with fio in xfstest generic/300 [*]: * The aio-dio-verifier thread in that test case writes 4k buffers and then reads them back in. * The filesystem has a block size if 1k. * The test case is designed to run the filesystem out of space. When that happens, some writes can end up short before they all fail with -ENOSPC. (That doesn't seem to happen on ext4 or xfs filesystems with a 1k block size --- possibly just because the test always runs on a scratch filesystem --- but it does trigger on gfs2.) * When the aio-dio-verifier thread reads a short 4k buffer back in, part of the buffer will be zero-filled, so verification will fail. This is with a current fio and kernel. Any thoughts? Thanks, Andreas [*] https://git.kernel.org/pub/scm/fs/xfs/xfstests-dev.git/tree/tests/generic/300
