Which I/O controller is the fairest of them all? [LWN.net]
An I/O controller is a system component intended to arbitrate access to block storage devices; it should ensure that different groups of processes get specific levels of access according to a policy defined by the system administrator. In other words, it prevents I/O-intensive processes from hogging the disk. This feature can be useful on just about any kind of system which experiences disk conten
A futex overview and update [LWN.net]
November 11, 2009 This article was contributed by Darren Hart The futex [PDF] mechanism, introduced in 2.5.7 by Rusty Russell, Hubertus Franke, and Mathew Kirkwood, is a fast, lightweight kernel-assisted locking primitive for user-space applications. It provides for very fast uncontended lock acquisition and release. The futex state is stored in a user-space variable (an unsigned 32-bit integer on
KS2009: How Google uses Linux
There may be no single organization which runs more Linux systems than Google. But the kernel development community knows little about how Google uses Linux and what sort of problems are encountered there. Google's Mike Waychison traveled to Tokyo to help shed some light on this situation; the result was an interesting view on what it takes to run Linux in this extremely demanding setting. Mike st
What every programmer should know about memory, Part 1
What every programmer should know about memory, Part 1 [Editor's introduction: Ulrich Drepper recently approached us asking if we would be interested in publishing a lengthy document he had written on how memory and software interact. We did not have to look at the text for long to realize that it would be of interest to many LWN readers. Memory usage is often the determining factor in how softwar
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The 3.11 merge window closes [LWN.net]
The exfiltrated exFAT driver [LWN.net]
A binary analysis tool for GPL compliance investigations [LWN.net]
2.6.33 merge window part 1 [LWN.net]
The block I/O controller [LWN.net]
libcg: design and plans [LWN.net]
A position statement on closed-source kernel modules [LWN.net]
MagicPoint presentation foils