Please create an account to participate in the Slashdot moderation system

 



Forgot your password?
typodupeerror

Submission + - Live patching now available for Linux (kernel.org)

cyranix writes: You may never have to reboot your Linux machine ever again, even for kernel patching:

It provides a basic infrastructure for function "live patching" (i.e. code redirection), including API for kernel modules containing the actual patches, and API/ABI for userspace to be able to operate on the patches (look up what patches are applied, enable/disable them, etc). It's relatively simple and minimalistic, as it's making use of existing kernel infrastructure (namely ftrace) as much as possible. It's also self-contained, in a sense that it doesn't hook itself in any other kernel subsystem (it doesn't even touch any other code). It's now implemented for x86 only as a reference architecture, but support for powerpc, s390 and arm is already in the works (adding arch-specific support basically boils down to teaching ftrace about regs-saving).


Submission + - The Mathematical Case for Buying a Powerball Ticket 4

HughPickens.com writes: Neil Irwin writes at the NYT that financially literate people like to complain that buying lottery tickets is among the silliest decisions a person could make but there are a couple of dimensions that these tut-tutted warnings miss, perhaps fueled by a class divide between those who commonly buy lottery tickets and those who choose to throw away money on other things like expensive wine or mansions. According to Irwin, as long as you think about the purchase of lottery tickets the right way — purely a consumption good, not an investment — it can be a completely rational decision. "Fantasizing about what you would do if you suddenly encountered great wealth is fun, and it is more fun if there some chance, however minuscule, that it could happen," says Irwin. "The $2 price for a ticket is a relatively small one to pay for the enjoyment of thinking through how you might organize your life differently if you had all those millions."

Right now the Multi-State Lottery Association estimates the chances of winning the grand prize at about 1 in 175 million, and the cash value of the prize at $337.8 million. The simplest math points to that $2 ticket having an expected value of about $1.93 so while you are still throwing away money when buying a lottery ticket, you are throwing away less in strictly economic terms when you buy into an unusually large Powerball jackpot. "I am the type of financial decision-maker who tracks bond and currency markets and builds elaborate spreadsheets to simulate outcomes of various retirement savings strategies," says Irwin. "I can easily afford to spend a few dollars on a Powerball ticket. Time to head to the convenience store and do just that."

Submission + - Google Developing Uber Competitor (bloomberg.com)

An anonymous reader writes: Bloomberg breaks news that Uber has a major new competitor in ridesharing: Google. According to the report, Google has informed Uber's board of directors of this development, and shown screenshots of a ride-sharing app currently in testing by employees. Why did Google do this? Because they've heavily invested in Uber, and Google's David Drummond, chief legal officer and senior VP of corporate development, is on Uber's board. Of course, a Google ride-sharing service would fit perfectly with their project to build and develop autonomous vehicles. From the article: "Google has made no secret of its ambitions to revolutionize transportation with autonomous vehicles. CEO Larry Page is said to be personally fascinated by the challenge of making cities operate more efficiently. The company recently said the driverless car technology in development within its Google X research lab is between two and five years from being ready for widespread use." This could be very bad news for Uber (not to mention other ride-sharing services) because they rely heavily on Google's mapping data.

Slashdot Top Deals

How many hardware guys does it take to change a light bulb? "Well the diagnostics say it's fine buddy, so it's a software problem."

Working...