DTrace (or other monitor) access to LBA of a block device

[Andriy Gapon]

on 05/12/2010 20:02 Artem Belevich said the following:
>> GEOM sounds like a good candidate for probing of that kind.
>>
>> sudo dtrace -n 'fbt:kernel:g_io_deliver:entry { printf("%s %d %d
>> %d\n",stringof(args[0]->bio_from->geom->name), args[0]->bio_cmd,
>> args[0]->bio_offset, args[0]->bio_length); }'
> 
> By the way, in order for this to work one would need r207057 applied
> to -8. Any chance that could be MFC'ed?
> 
> http://svn.freebsd.org/viewvc/base?view=revision&revision=207057

Nice catch.

Alexander,
can that commit be trivially MFC-ed or are there any complications around this
change?

Thanks!
-- 
Andriy Gapon