dtrace discuss - May 2007 - dtrace is attaching the driver it is observing

While attempting to dtrace the attach of a storage HBA driver, running
the dtrace script causes the driver I am attempting to observe to attach
to its nodes.  And because the driver is misbehaving in attach, dtrace
never starts.

I thought starting dtrace might be causing all drivers to attach, so I
tried this workaround:

# move the HBA driver out of the way
mv /kernel/drv/amd64/nv_sata /kernel/drv/amd64/nv_sata.bk

# run devfsadm to attach everything else include the dtrace driver
devfsadm

# move the HBA driver back
mv /kernel/drv/amd64/nv_sata.bk /kernel/drv/amd64/nv_sata

# load it, but don''t attach
modload /kernel/drv/amd64/nv_sata

# dtrace it
dtrace -s ./nv.d

And still no luck.  nv.d still causes the driver''s attach routine to
run.  What am I doing wrong?


thx

Marty