Monthly Archives: May 2009

When is it a good idea to use a reader-writer lock?

Posted on May 28, 2009 by paulmckrcu

Reader-writer locks can certainly cause problems if used carelessly, the problems including cache thrashing, write-side contention, and poor scaling. But it is a rare tool that does not have some jobs that it is good for, so it is reasonable … Continue reading →

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Linux Plumbers Conference News

Posted on May 27, 2009 by paulmckrcu

Linux Plumbers Conference is making great progress! Linus Torvalds has graciously agreed to give an advanced git tutorial, Keith Packard has agreed to give one of the keynotes, and Vivek Kundra (Federal CIO) has agreed to be listed as an … Continue reading →

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User-level implementation of RCU now available under LGPL

Posted on May 14, 2009 by paulmckrcu

Mathieu Desnoyers’s user-level RCU implementation has now been relicensed under LGPL! This is available at git://lttng.org/userspace-rcu.git, as before.

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Abusing Promela to solve CACM puzzle

Posted on May 9, 2009 by paulmckrcu

The May issue of Communications of the ACM has a page of puzzles at the end, the first of which involves a colony of 54 chameleons, of which 20 are red, 18 are blue, and 16 are green. Should a … Continue reading →

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