usertap kernel read faults - can I ignore them somehow?

[Matthew Ward]

On 29/11/2011 14:38, Frank Ch. Eigler wrote:
>
> Hi, Matthew -
>
>> I'm having an issue with our usertap tapset
>> (https://github.com/fubralimited/usertap) [...]
>> ERROR: kernel read fault at 0x0000000100000264 (addr) near identifier
>> '@cast' at /usr/share/systemtap/tapset/ip.stp:45:11
>
> You can do several things.
> First, you can run "stap --skip-badvars ...", which turns all erroneous
> $var accesses into 0.  Second, you can (sometimes) wrap expressions with
>     try { var = $var } catch { }
> to absorb the error.  But see<http://sourceware.org/PR13306>.
>
> - FChE
>

Thanks, that's exactly what I was looking for. When using the 
--skip-badvars option, if I'm running the tapset as a service using 
stapio, do I pass this to /usr/bin/stap when I build the original module 
(.ko) and this will apply whenever the module version is used by stapio 
etc. from then on?

Matt.