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| author | Max Reitz <mreitz@redhat.com> | 2015-06-01 18:09:18 +0200 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2015-06-12 15:54:01 +0200 |
| commit | a4291eafc597c0944057930acf3e51d899f79c2e (patch) | |
| tree | 17002b458b71ed6d30cd00baff633ee536cbfc4c /tests/qemu-iotests/103 | |
| parent | 57e216695948a79d9ced82fc217a37cce70fd986 (diff) | |
| download | qemu-a4291eafc597c0944057930acf3e51d899f79c2e.tar.gz | |
iotests: qcow2 COW with minimal L2 cache size
This adds a test case to test 103 for performing a COW operation in a
qcow2 image using an L2 cache with minimal size (which should be at
least two clusters so the COW can access both source and destination
simultaneously).
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'tests/qemu-iotests/103')
| -rwxr-xr-x | tests/qemu-iotests/103 | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/tests/qemu-iotests/103 b/tests/qemu-iotests/103 index ccab551f63..fa9a3c1fc9 100755 --- a/tests/qemu-iotests/103 +++ b/tests/qemu-iotests/103 @@ -93,6 +93,16 @@ $QEMU_IO -c "open -o l2-cache-size=1M,refcount-cache-size=0.25M $TEST_IMG" \ -c 'read -P 42 0 64k' \ | _filter_qemu_io +echo +echo '=== Testing minimal L2 cache and COW ===' +echo + +$QEMU_IMG snapshot -c foo "$TEST_IMG" +# This requires a COW operation, which accesses two L2 tables simultaneously +# (COW source and destination), so there must be enough space in the cache to +# place both tables there (and qemu should not crash) +$QEMU_IO -c "open -o cache-size=0 $TEST_IMG" -c 'write 0 64k' | _filter_qemu_io + # success, all done echo '*** done' rm -f $seq.full |