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diff --git a/content/posts/2002-01-16-kernel-fun.html b/content/posts/2002-01-16-kernel-fun.html new file mode 100644 index 0000000..3dca062 --- /dev/null +++ b/content/posts/2002-01-16-kernel-fun.html @@ -0,0 +1,73 @@ +--- +date: "2002-01-16T14:15:59Z" +title: Kernel Fun +--- + +<p> + +This weekend I decided to upgrade from my trusty 2.4.16 + <a href="http://www.kernel.org/pub/linux/kernel/people/rml/preempt-kernel/">preempt</a> to +something a bit more recent. The first thing I tried was +<a +href="http://www.kernel.org/pub/linux/kernel/v2.4/testing/patch-2.4.18.log">2.4.18-pre3</a> + +<a +href="http://www.kernel.org/pub/linux/kernel/people/rml/preempt-kernel/v2.4/ingo-O1-sched/">O(1) + preempt</a> + <a href="http://www.kernel.org/pub/linux/kernel/people/rml/lock-break/">lock-break</a>, +which fell over miserably on my system (eg if it didn't panic at boot I +could consistently cause a panic with a <code>gmake -j5</code>). After +some "testing" on +<a href="http://www.kernelnewbies.org/">IRC</a> with +<a href="http://tech9.net/rml/">Robert Love</a> (ie, boot, wait +until panic and hard lock, write entire panic on piece of paper, reboot +into stable kernel and type up panic, post panic to web for Robert to +run ksymoops on, apply patch to kernel, reboot, repeat), I finally +decided to take a break from +<a href="http://www.kernel.org/pub/linux/kernel/people/rml/preempt-kernel/">preempt</a> +for the week and give <a href="http://www.zip.com.au/~akpm/linux/schedlat.html#downloads">low latency</a> a shot. I'm running +<a +href="http://www.kernel.org/pub/linux/kernel/v2.4/ChangeLog-2.4.17">2.4.17</a> ++ <a href="http://www.surriel.com/patches/">rmap</a> + +<a href="http://people.redhat.com/mingo/O(1)-scheduler/">O(1)</a> + <a href="http://www.zip.com.au/~akpm/linux/schedlat.html#downloads">low latency</a> now, and it +seems to be pretty stable. I'll try out <a href="http://www.kernel.org/pub/linux/kernel/people/rml/preempt-kernel/">preempt</a> + <a href="http://www.kernel.org/pub/linux/kernel/people/rml/lock-break/">lock-break</a> again +this weekend and let everyone know what happens. By the way, the +problems I mentioned above with <a href="http://www.kernel.org/pub/linux/kernel/people/rml/preempt-kernel/">preempt</a> have to do with SMP and +preemption near interrupts -- all you single-processor users have +nothing to fear. +</p> + +<p> + +There has been a really amusing thread on the LKML for the last few +weeks regarding automatic kernel build configuration. The thread +started as a question from <a href="http://www.tuxedo.org/~esr/">ESR</a> about probing the ISA bus, and progressed +(devolved?) into an amusing war of metaphors between <a href="http://www.linux.org.uk/diary/">Alan Cox</a> and <a href="http://www.tuxedo.org/~esr/">ESR</a>. +Essentially, <a href="http://www.tuxedo.org/~esr/">ESR</a> used a hypothetical "Aunt Tillie" to represtent the +typical technology-impaired "mom and pop" Linux user, who, for some +unspecified reason, opts to compile her own kernel instead of using the +modular vendor-supplied, vendor-tested, and vendor-supported version. +After the Aunt Tillie scenario made relatively little progress against +<a href="http://www.linux.org.uk/diary/">Alan Cox</a> and a handful of other people, <a href="http://www.tuxedo.org/~esr/">ESR</a> added "Nephew Melvin" to the +list of hypothetical characters. Anyway, <a href="http://www.linux.org.uk/diary/">Alan Cox</a>'s latest contribution +to the argument: + +</p> + +<p> +<pre> +From: Alan Cox <alan@aunt-tillie.org> +... +pabs@gw-uunet:~> whois aunt-tillie.org +... +Registrant: + Melvin? What do I type here? + 10 Alan Turing Road + Surrey Research Park + Guildford, Surrey GU2 7YF + UK +</pre> +</p> + +<p> +Be sure to check out +<a href="http://www.aunt-tillie.org/">http://www.aunt-tillie.org/</a> +as well. +</p> + |