zfs discuss - May 2007 - Re: ZFS over a layered driver interface

Thanks to everyone for their help! yes dtrace did help and I found that in my
layered driver, the prop_op entry point had an error in setting the [Ss]ize
dynamic property, and apparently that''s what ZFS looks for, not just
Nblocks! what took me so long in getting to this error was that the driver was
faulting not in the beginning but after some reads and writes (basically when
the offset exceeded the size, it gave rise to the EINVAL), and that too within
zio_wait(), which confused it with a synchronization problem.
With that fixed, the layered driver works fine when I try to create a storage
pool with it.
 
 
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