On Mon, May 14, 2007 at 11:55:28AM -0500, Swetha Krishnan wrote:
> Thanks Eric and Manoj.
>
> Here's what ldi_get_size() returns:
> bash-3.00# dtrace -n 'fbt::ldi_get_size:return{trace(arg1);}' -c 'zpool
> create adsl-pool /dev/layerzfsminor1' dtrace: description
> 'fbt::ldi_get_size:return' matched 1 probe
> cannot create 'adsl-pool': invalid argument for this pool operation
> dtrace: pid 2582 has exited
> CPU ID FUNCTION:NAME
> 0 20927 ldi_get_size:return 4294967295
>
>
> This is strange because I looked at the code for ldi_get_size() and the
> only possible return values in the code are DDI_SUCCESS (0) and
> DDI_FAILURE(-1).
>
> Looks like what I'm looking at either isn't the return value, or some
> bad address is being reached. Any hints?
That is actually -1 (2^32 - 1). The default type for 'argN' in DTrace
is unsigned. If you do 'trace((int)arg1)', you'll see -1.
- Eric
--
Eric Schrock, Solaris Kernel Development http://blogs.sun.com/eschrock
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