Am 26.01.2024 um 12:04 hat Andrey Drobyshev geschrieben: > On 1/26/24 12:24, Kevin Wolf wrote: > > Am 11.12.2023 um 14:32 hat Andrey Drobyshev geschrieben: > >> There're tests whose logic implies running without O_DIRECT set, > >> otherwise they fail when running iotests in '-nocache' mode. For these > >> tests let's add _require_no_o_direct() helper which can be put in the > >> preabmle and which makes sure '-nocache' isn't set. Use it to skip > >> running the following tests: > >> > >> * 271: creates files with unaligned sizes, thus producing multiple > >> errors like: > >> > >> qemu-io: can't open device /path/to/t.qcow2.raw: Cannot get 'write' > >> permission without 'resize': Image size is not a multiple of request > >> alignment > >> > >> * 308, file-io-error: use fuse exports. Though fuse does have > >> 'direct-io' mode (see https://docs.kernel.org/filesystems/fuse-io.html) > >> we aren't using it yet, thus getting errors like: > >> > >> qemu-io: can't open device /path/to/t.qcow2.fuse: Could not open > >> '/path/to/t.qcow2.fuse': filesystem does not support O_DIRECT > >> > >> Signed-off-by: Andrey Drobyshev <andrey.drobys...@virtuozzo.com> > > > > How are you running qemu-iotests to make these tests fail? I tried to > > reproduce, but they just pass for me: > > > > $ tests/qemu-iotests/check -qcow2 -nocache 271 308 file-io-error > > [...] > > 271 pass [11:20:50] [11:21:11] 21.1s (last: 20.4s) > > 308 pass [11:21:11] [11:21:14] 3.3s (last: 3.3s) > > file-io-error pass [11:21:14] [11:21:14] 0.3s (last: 0.3s) > > Passed all 3 iotests > > > > $ tests/qemu-iotests/check -raw -nocache 271 308 file-io-error > > 271 not run [11:21:20] [11:21:21] ... not > > suitable for this image format: raw > > 308 pass [11:21:21] [11:21:24] 3.8s (last: 2.8s) > > file-io-error pass [11:21:24] [11:21:25] 0.3s (last: 0.3s) > > Not run: 271 > > Passed all 2 iotests > > > > Kevin > > > > As for the test 271, I imagine this might be caused by different request > alignment. The failure occurs in block.c, bdrv_node_refresh_perm(). If > I print the alignment out explicitly, I get: > > qemu-io: can't open device /path/to/t.qcow2.raw: Cannot get 'write' > permission without 'resize': Image size is not a multiple of request > alignment: 4096
Oh, do you have a 4k sector size? I think for me O_DIRECT only enforces 512 byte alignment. I can later try again on a 4k sector size loopback device or something. If so, I think that's worth mentioning in the commit message. > For the record, I'm running tests on ext4. I don't expect that this makes the difference, but xfs for me. > I'm not sure about the fuse tests though. Could it also have smth to do > with the underlying fs? Probably the same request alignment thing then. Kevin
