> From bounces-netbsd-users-owner-mayuresh=sdf....@netbsd.org Mon Apr 22 > 04:55:39 2019 > From: Robert Elz <k...@munnari.oz.au> > To: Mayuresh Kathe <mayur...@sdf.org> > cc: netbsd-users@netbsd.org > Subject: Re: netbsd : internals : bach book : good to start-off? > > Date: Mon, 22 Apr 2019 04:34:44 GMT > From: Mayuresh Kathe <mayur...@sdf.org> > Message-ID: <201904220434.x3m4yici026...@sdf.org> > > | just nitpicking, isn't bach's book reasonable enough for unix internals? > :) > > You think there is just one "unix" to have internals? Or that they are > all really similar, or something? > > As I recall (it has been a long time since I looked, but I think I > have a copy of that one, or some edition of it anyway somewhere) Bach's > book mostly describes System V. > > Even in the early 90's (in the vintage of McKusick's 4.3BSD book) > System V and BSD had diverged quite a lot internally. > > In the decades since, even moreso. There is (that I know of anyway) > no book that will come really close to describing NetBSD internals, > with all the bus_map and mem management (incl UVM), and locking, and ... > that are more or less unique to NetBSD - and yet are all fundamental > to a true understanding of the internals. > > Even McKusick's FreeBSD book (as similar aas FreeBSD is to NetBSD in > some ways) will contain much that is not relevant to NetBSD (including > soft mounts, and all related to that) and be lacking much, but it > is going to be much closer to NetBSD and so get you further than Bach's > book would. > > But if all you want is a guide to how some arbitrary unix system might > be implemented, or if you really want to know SysV internals, then yes, > that one should be just fine. > > kre > > ps: if you're really looking for a user or programmer's guide, then you > want something quite different. > >
i am not looking for a user or programmer's guide. i have no knowledge of any operating system internals, leave alone unix. so, since bach's book is so light (in terms of page count) and affordable i thought it would be a good starting-off point into operating system internals. i know and fully acknowledge that i will have to work hard to understand netbsd internals, and the currently, the only way to do so is by reading the source, over and over again till i get comfortable with it.
