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Eric Sandeen
b05ae2d653
This replicates file corruption we've seen with qemu-kvm when we use if=virtio,cache=none,aio=native for IO to a sparse ext4- or xfs-hosted file, and the partitions/filesystems within that file image are not block-aligned. (think sector 63 here...) This results in AIO IOs not aligned to the filesystem blocks. This test modifies aiodio_sparse2.c to add an option to start the file IO at an offset. When we do 4k writes to a 16k file in 2 threads, starting at offset 512, we get 0s interspersed in the file where they should not be: 00000000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 00000200 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 |................| * 00001000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 00001200 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 |................| .... Signed-off-by: Eric Sandeen <sandeen@sandeen.net> Reviewed-by: Dave Chinner <dchinner@redhat.com>
3 lines
44 B
Plaintext
3 lines
44 B
Plaintext
QA output created by 240
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Silence is golden.
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