We are contemplating porting a large number of device drivers to Linux. The pragmatic solution is to keep them in user mode (using the UIO framework) where possible ... they are written in C++ for a start. The obvious disadvantages of user mode device drivers are security / isolation. The main benefit is ease of development. Do you know what the *technical* disadvantages of this approach might be? I am most concerned about possible impact on interrupt handling. For example, I assume the context switching overhead is higher, and that interrupt latency is more difficult to predict? --jim douglas Avaya UK, Registered in England and Wales under Registered Number 3049861, Registered Address: Avaya House, Cathedral Hill, Guildford, Surrey, GU2 7YL. -- To unsubscribe from this list: send the line "unsubscribe linux-embedded" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
