On Sat, 2009-03-21 at 11:49 +0000, TJ wrote:

> On Sat, 2009-03-21 at 10:48 +0000, Scott James Remnant wrote:
> > It isn't trivial, it's extraordinarily expensive - we run modprobe
> > several hundred times during a normal boot, having to check the module
> > options against the module would add a significant penalty!
> 
> I've not been able to detect even a millisecond of difference using the
> patched modprobe.
> 
> The code only performs if options are being passed. If they are, the
> already memory-mapped module image's .modinfo section is located and for
> each "param=" the name is checked against the final list of options. If
> the parameter occurs in the options it is kept. Any options not matched
> are dropped.
> 
I think this is dangerous - for example what if the option was to
correct a security issue?  Dropping the option would expose the hole
again, you want the module load to fail and somebody to resolve the
issue.

Scott
-- 
Scott James Remnant
sc...@canonical.com

-- 
Wifi driver will fail to load if regulatory domain set in module options
https://bugs.launchpad.net/bugs/343026
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