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Operating Systems

Removing the Big Kernel Lock 222

Corrado writes "There is a big discussion going on over removing a bit of non-preemptable code from the Linux kernel. 'As some of the latency junkies on lkml already know, commit 8e3e076 in v2.6.26-rc2 removed the preemptable BKL feature and made the Big Kernel Lock a spinlock and thus turned it into non-preemptable code again. "This commit returned the BKL code to the 2.6.7 state of affairs in essence," began Ingo Molnar. He noted that this had a very negative effect on the real time kernel efforts, adding that Linux creator Linus Torvalds indicated the only acceptable way forward was to completely remove the BKL.'"

Understanding How CAPTCHA Is Broken 148

An anonymous reader writes "Websense Security Labs explains the spammer Anti-CAPTCHA operations and mass-mailing strategies. Apparently spammers are using combination of different tactics — proper email accounts, visual social engineering, and fast-flux — representing a strategy, explains their resident CAPTCHA expert. It is evident that spammers are working towards defeating anti-spam filters with their tactics."
The Military

The World's Spookiest Weapons 224

DesScorp writes "Popular Science has a piece on some outrageous ideas for weapons; some came to fruition, and others didn't. And while some of the weapons (atom bombs, chemical weapons, bats with bombs strapped to them that seek out homes and buildings at night) are truly frightening, some of them are also kind of silly, such as the Gay Bomb, and the Frisbee bomb that was labeled the 'Modular Disc-Wing Urban Cruise Munition.'"
Space

Anomalous Pulsar In Binary System Stymies Theorists 53

Science Daily has word of a millisecond pulsar in the wrong kind of binary system that has astronomers scratching their heads. According to current models of pulsar evolution, such a system should have no way to develop. The pulsar J1903+0327, which rotates 465 times per second, seems to be in a highly elongated orbit around a Sun-like star. Quoting: "Astronomers think most millisecond pulsars are sped up by material falling onto them from a companion star. This requires the pulsar to be in a tight orbit around its companion that becomes more and more circular with time. The orbits of some millisecond pulsars are the most perfect circles in the Universe, so the elongated orbit of the new pulsar is a mystery."
The Courts

Woman Indicted In MySpace Suicide Case 654

longacre writes "The Associated Press is reporting an indictment has been handed down in the sad case of Megan Meier, the girl who committed suicide after receiving upsetting MySpace messages from someone she perceived to be her boyfriend. It was later determined the boy, Josh Evans, was a fictitious identity created by a neighbor of Meier's family. Lori Drew, of a St. Louis suburb, has been charged with 'one count of conspiracy and three counts of accessing protected computers without authorization to get information used to inflict emotional distress on the girl.' Interestingly, despite the alleged crime having occurred strictly in Missouri, the case was investigated by the FBI's St. Louis and Los Angeles field offices, and the trial will be held in Los Angeles, home of MySpace's servers. Wired is running a related story about the potentially 'scary' precedent this case could set."

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