Re: [9fans] Nemo's Opus

[Winston Kodogo <kodogo@gmail.com>]

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To add to the previous comments, I'm a huge fan of Nemo's “Introduction to
Operating Systems Abstractions”:

https://lsub.org/who/nemo/9.intro.pdf

It's just a brilliant guide to finding your way around the system, and
doing some programming in it, especially if you're not a kernel-head and
talk of "ring 0" makes your brain hurt.

Not that my being a huge fan of anything of anything is in general a
recommendation, but in this case I'm right.

On 10 September 2016 at 07:36, Sergey Zhilkin <szhilkin@gmail.com> wrote:

> 5 cents from me, as I'm fan of Nemo's writings (and code also) link to his
> papers https://lsub.org/who/nemo/papers.html
>
> 2016-09-09 18:54 GMT+03:00 Brantley Coile <brantleycoile@me.com>:
>
>> I’ve been reading Nemo’s “Notes on the Plan 9 3rd edition Kernel Source”
>> after a number of years. Three things struck me on this reading of what is
>> a great and much appreciated work. First, is what a good job Francisco did
>> with this work. Even though he never finished it, having been overtaking, I
>> think, by the 4th edition, it is a very good introduction to an operating
>> system suitable for instruction in a undergraduate or graduate class in
>> operating systems. I, fortunately, don’t have to teach, but if I did, I
>> would certainly use the work.
>>
>> Second, I’m struck by how much larger the system had grown by the time
>> Nemo wrote the commentary. I had the good fortune to read John Lion’s
>> commentary on Plan 9 during my brief tenure at Bell Labs in 1990. If I
>> remember right, the kernel I was using was bout 25,000 lines. The first
>> version I used outside the Labs was the 2nd edition it weighs in at a hefty
>> 39,000 lines. The current system I’m running, the 32 bit one, not the 64
>> bit one, is 140,000 lines. I’m not sure the size of the 3rd edition, but
>> the growth is interesting.
>>
>> The third thing that struct me is the changes in the Intel architecture
>> since the original PC based port. The first Plan 9 for PC ran on AT&T 386
>> machines in the 1990’s, if I remember right. Those were the days of ISA and
>> EISA and before PCI made it’s plug-and-play appearance on the scene. It
>> seems that while the PC stuff has kept up with most of the many changes in
>> the Intel hardware platform over the years, there is still some cruft from
>> the old days.
>>
>> All very interesting to think about. I highly recommend Nemo’s book.
>> Here’s a link to it.
>>
>> http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.75.
>> 5409&rep=rep1&type=pdf
>>
>>   Brantley Coile
>>   bwc@coraid.com
>>   http://coraid.com
>>
>>
>>
>
>
> --
> С наилучшими пожеланиями
> Жилкин Сергей
> With best regards
> Zhilkin Sergey
>

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