Kevin Chadwick <ma1l1ists@xxxxxxxxxxx> writes: > On Mon, 07 May 2012 22:40:01 +0800 > XeCycle wrote: > >> Violations of this philosophy can be easily found. The Linux >> kernel is such one. It is already big, with many misfeatures, or >> "anitfeature"s; but we all use it, right? Linus said such a >> design simplifies the intercommunication between kernel modules. > > I disagree, your obviously clutching at straws, OpenBSD, no modules but > monolithic yes. Many argue for and against monolithic or kernels such > as QNX where drivers can't hang the kernel (atleast in theory). This is > irrelevent. Simple tools do become more than they're parts. grep, cut, > tr, cat and do they're particular job well and with less bugs. You're right, but --- you still need something complex to do with complex jobs, so I'd say there's nothing wrong with these complex tools --- right? In the traditional pipe way of using these Unix tools, each are acting quite like a finite automata, and you join them sequentially to perform the job. But a finite automata is not Turing-complete, you'll need to do a lot more when you need something missing in this paradigm. So we see many sys admins go with Perl. > Init is a simple job. Depends on what you want out of it. You can surely hand off parts of the job to something else, say, user session management; but if that job needs to talk to init to do better, why not just integrate it with init. > The main case you didn't bring up is perhaps where speed is paramount. > I can't think of any others of the top of my head and certainly none > that apply to whether the ultimate dependency, init, should be complex. > > > Imagine a system where the kernel had been stripped down to kilobytes > yet init was megabytes. That would be a waste of brain cells. If several MiBs is surely needed to make the system usable, it's okay to call them together as "kernel". > p.s. I wouldn't mind knowing more about event driven too. I believe I > was given an impression of what it was when systemd first hit ubuntu but > I can't remember finding out exactly. A quick google just now turned up > nothing. IIRC Ubuntu goes with Upstart the first time I heard of them. -- Carl Lei (XeCycle) Department of Physics, Shanghai Jiao Tong University OpenPGP public key: 7795E591 Fingerprint: 1FB6 7F1F D45D F681 C845 27F7 8D71 8EC4 7795 E591
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