From: Larry McVoy <lm@mcvoy.com>
To: Clem Cole <clemc@ccc.com>
Cc: tuhs@tuhs.org, Doug McIlroy <doug@cs.dartmouth.edu>
Subject: Re: [TUHS] Lions book
Date: Fri, 17 Jan 2020 07:23:34 -0800 [thread overview]
Message-ID: <20200117152334.GJ28686@mcvoy.com> (raw)
In-Reply-To: <CAC20D2Ncjeo5xhC2nGEgAR_KnxytuanGHK-bj3yun7tc1q3-+w@mail.gmail.com>
On Fri, Jan 17, 2020 at 09:50:24AM -0500, Clem Cole wrote:
> 6th Edition is clear and if you want to understand what it takes and how it
> works, John's commentary it difficult to beat.
It's a good starting point but it's pretty outdated. I like to go on and
on about how much I love the SunOS 4.x kernel but it is outdated as well.
I wish there was a v6/SunOS like kernel that was as clean but had good
support for SMP and NUMA and TCP offload (and probably a long list of
other useful stuff I've forgotten).
Teaching kids how a single threaded kernel works is cool but it's
also misleading, the world has gotten a lot more complex. And while
the kernels of decades ago were clean and simple, I don't know of
a kernel to point people to that has the clean code that SunOS had.
Solaris isn't it, though it has some bright spots. Linux is meh, it's
better than nothing by a lot but I would not point to it as "read this,
kid, you'll see the architecture". It's not clear there is a good
answer.
next prev parent reply other threads:[~2020-01-17 15:24 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-17 14:31 Doug McIlroy
2020-01-17 14:50 ` Clem Cole
2020-01-17 15:23 ` Larry McVoy [this message]
2020-01-17 16:00 ` Warner Losh
2020-01-17 16:15 ` Clem Cole
2020-01-17 17:21 ` Adam Thornton
2020-01-18 3:35 ` G. Branden Robinson
2020-01-17 15:24 ` John P. Linderman
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