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New
The latest blog posts to take off on Hacker News. 4,390 posts.
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The sad state of Linux Wi-Fi
I've been using 802.11 on Linux now for over a decade, and to be honest, it's still a pretty sad experience. It works well enough that I mostly don't care... but when I care, and try to dig deeper, it always ends up in the answer “this is just crap”.
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Introduction to Coreboot, an open source BIOS
Deze pagina bestaat niet of is niet meer beschikbaar. Oude XS4ALL-homepages zijn soms nog terug te vinden via webarchieven.
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LibreSSL's PRNG is Unsafe on Linux
The first version of LibreSSL portable, 2.0.0, was released a few days ago (followed soon after by 2.0.1 ). Despite the 2.0.x version numbers, these are only preview releases and shouldn't be used in production yet, but have been released to solicit testing and feedback. After testing and examining the codebase, my…
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Making an embedded Linux computer
Designing and soldering a small ARM Linux board with 217 ball BGA package and 0402 passive components
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Visualising the Go garbage collector
gcvis is a simple way of visualising the operation of the garbage collector within a Go process. Here is a screenshot of it in operation. The rest of this article explores how gcvis works and how to interpret its results.
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Call me maybe: MongoDB (2013)
Previously in Jepsen , we discussed Redis . In this post, we’ll see MongoDB drop a phenomenal amount of data. See also: followup analyses of 2.6.7 and 3.4.0-rc3 .
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Formal Methods in Building Robust Distributed Systems
We all know that when designing and operating applications at scale, it is persistent state management that brings the most difficult challenges. Delivering state-free applications has always been (fairly) easy. But most interesting commercial and consumer applications need to manage persistent state. Advertising…
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DNSSEC Downtime: List of Outages & Validation Failures
Major DNSSEC Outages and Validation Failures
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I/O Thoughts
This year was the first time I've attended the Google I/O conference, and it was a fascinating experience. As someone who is primarily an iOS developer and h...
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Recovering deleted files using only grep
Alex Clemmer is a computer programmer. Other programmers love Alex, excitedly describing him as "employed here" and "the boss's son".
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Call me maybe: Elasticsearch
This post covers Elasticsearch 1.1.0. In the months since its publication, Elasticsearch has added a comprehensive overview of correctness issues and their progress towards fixing some of these bugs.
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Debian is switching back to GLIBC
Five years ago Debian and most derivatives switched from the standard GNU C Library (GLIBC) to the Embedded GLIBC (EGLIBC). Debian is now about to...
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Call me maybe: etcd and Consul
In the previous post, we discovered the potential for data loss in RabbitMQ clusters . In this oft-requested installation of the Jepsen series, we’ll look at etcd : a new contender in the CP coordination service arena. We’ll also discuss Consul ’s findings with Jepsen.
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Algorithmic complexity attacks and libc qsort()
An algorithmic complexity attack is a denial of service attack that triggers worst case behaviour in code that is otherwise expected to perform well. The canonical example would be the widely published attacks against hash table implementations , where carefully crafted inputs made snappy \(O(1)\) operations…
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HFS+ Bit Rot
HFS+ is a terribly old filesystem with serious flaws. I sincerely hope that Apple comes with an update of the filesystem for WWDC 2015. After all they have been working on Swift for the past 4 years and we have just learned about it last week. HFS+ is seriously old HFS+ was released in 1998, in the era of Mac OS…
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Call me maybe: RabbitMQ
RabbitMQ is a distributed message queue, and is probably the most popular open-source implementation of the AMQP messaging protocol. It supports a wealth of durability, routing, and fanout strategies, and combines excellent documentation with well-designed protocol extensions. I’d like to set all these wonderful…
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Things that make Go fast
Anthony Starks has remixed my original Google Present based slides using his fantastic Deck presentation tool. You can check out his remix over on his blog, mindchunk.blogspot.com.au/2014/06/remixing-with-deck .
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Secrets of dispatch_once; x86 performance trickery
Reader Paul Kim pointed out an entry on Michael Tsai's blog about making dispatch_once fast . While the comment in the dispatch_once source code is fascinating and informative, it doesn't quite delve into the detail that some would like to see. Since this is one of my favorite hacks, for today's article I'm going to…
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How Protothreads Really Work
What goes on behind the magical macros in the C protothreads library? Why are they macros? How do the macros work? Read on for the explanation.
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Running OS X Mavericks under QEMU with KVM
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We Need Hardware Traps for Integer Overflow
How many problem domains require wrapping signed integers or non-wrapping unsigned integers? Can the current undefined case be replaced with a trap and everything else be left intact?