b84762e245
The 035 parallel aio write test relies on knowledge of qcow2 metadata layout to stress parallel L2 table accesses. This only works for qcow2 unless we add additional calculations for qed or other formats. Mark this test as qcow2-only. Note that the test is strictly speaking non-deterministic although the output produced is reliable with qcow2. This is because the aio_write command returns before the aio write request has completed. Completions can occur at any time afterwards and cause a message to be printed. Therefore the exact output of this test is not deterministic but we seem to get away with it for qcow2 (maybe due to coroutine and main loop scheduling). Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> |
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README
=== This is the QEMU I/O test suite === * Intro This package contains a simple test suite for the I/O layer of qemu. It does not require a guest, but only the qemu, qemu-img and qemu-io binaries. This does limit it to exercise the low-level I/O path only but no actual block drivers like ide, scsi or virtio. * Usage Just run ./check to run all tests for the raw image format, or ./check -qcow2 to test the qcow2 image format. The output of ./check -h explains additional options to test further image formats or I/O methods. * Feedback and patches Please send improvements to the test suite, general feedback or just reports of failing tests cases to qemu-devel@savannah.nongnu.org.