Hans Petter Selasky wrote: > In the answers from the Microsoft guy, there were some arguments about > security. Many kind of device drivers could have been made more secure by > moving out of the kernel, for example webcam drivers, which is a class of > devices which are especially using a lot of isochronous endpoints. The use > case is there for sure, but probably nobody saw it.
I have long argued that code should never be in the kernel unless it absolutely MUST be in the kernel, but isochronous drivers almost always have performance and latency issues. The primary disadvantage of moving drivers to user-mode is that latency goes up and throughput goes down. Microsoft quotes a 10% performance penalty. There are many classes where that doesn't matter, but webcam drivers aren't one of them. -- Tim Roberts, t...@probo.com Providenza & Boekelheide, Inc. ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ libusbx-devel mailing list libusbx-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/libusbx-devel
