Re: [patch 0/5] RFC: fault-injection capabilities

[Valdis . Kletnieks]

On Wed, 23 Aug 2006 20:32:43 +0900, Akinobu Mita said:

> For example about kmalloc failures:
> 
> /debug/failslab/probability
> 
> 	specifies how often it should fail in percent.

As others have noted, the *right* semantics for this is being able to inject a
1% or higher rate in the code you're interested in, while maintaining a 0
injection rate for things outside the module under test.  Maybe a /debug/
failslab/address_start and address_end, and a userspace helper that peeks at a
System.map and injects the right values - then it's a simple compare of the
high/low addresses provided against the caller address.

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