[fio-2.1.9] verify and bssplit do not work together

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Jens,

I notice that when I enable bssplit and verify, verify always fails:

...
meta: verify failed at file /tmp/test offset 7143424, length 65536
open verify buf file: Read-only file system
....
In my tests, the offsets that fails are always:
7143424, 15073280, 2647654, 450397184, 88080384, 88211456

it does not happen when I set a fixed size with bs, or when I do not verify.

Here is the fio control file I use:

[stress]
filename=/tmp/test
size=107374182

readwrite=randrw
bssplit=64k/50:1M/50
;bs=64k

do_verify=1
verify=meta
verify_interval=64k
verify_dump=1
continue_on_error=verify

Also, if I set a verify_interval larger than the smallest io size in
bssplt, I get another kind of error.
Error messages with bssplt=4k/50:1M/50:

verify: bad magic header a678, wanted acca at file /tmp/test offset
9097216, length 429524186
verify: bad magic header 84b9, wanted acca at file /tmp/test offset
25268224, length 21518097
verify: bad magic header ba51, wanted acca at file /tmp/test offset
26505216, length 536429778
verify: bad magic header 1197, wanted acca at file /tmp/test offset
42139648, length 373139796
verify: bad magic header 22bf, wanted acca at file /tmp/test offset
42209280, length 493427719
meta: verify failed at file /tmp/test offset 50462720, length 65536
open verify buf file: Read-only file system
open verify buf file: Read-only file system
verify: bad magic header d1f6, wanted acca at file /tmp/test offset
52305920, length 322125536
verify: bad magic header 76ee, wanted acca at file /tmp/test offset
92106752, length 355054425
verify: bad magic header 821, wanted acca at file /tmp/test offset
94904320, length 460051914

I don't get these error when I set bs=4k.
Are you aware of such a limitation in fio?

Thanks,

Gwendal.
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