Cover Story

69 TALON: GPL SOFTWARE FOR TELESCOPE CONTROL

The open-source revolution in astronomy is largely thanks to Talon, the GPL package that handles tracking, scheduled operations, environmental monitoring, dome control and even image analysis. Our author Tony Steidler-Dennison has set up Talon-based telescopes at staffed and automated locations around the world.

FEATURES

38 SCALING DCACHE WITH RCU

As the number of processors grow, Linux either can hit a performance wall or explore new algorithms.

PAUL E. MCKENNEY, DIPANKAR SARMA AND MANEESH SONI

48 SIGNED KERNEL MODULES

Crypto techniques give device drivers a new security check.

GREG KROAH-HARTMAN

54 CONTROLLING HARDWARE WITH IOCTLS

Control all the little stuff that isn't in the UNIX programming books.

LISA CORSETTI

58 UNDERSTANDING CACHING

Use the cache right, and your code runs fast.

JAMES BOTTOMLEY

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Telescopes Mastery

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