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Domain: kerneltrap.org
Stories and comments across the archive that link to kerneltrap.org.
Stories · 185
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Linus on Kernel Version Numbering
walshy007 writes "In a recent thread it was asked what it would take for an 'unstable' 2.7 development tree to be created, to which Linus replied: 'Nothing. I'm not going back to the old model. The new model is so much better that it's not even worth entertaining as a theory to go back. That said, I _am_ considering changing just the numbering. Not to go back to the old model, but because a constantly increasing minor number leads to big numbers. I'm not all that thrilled with "26" as a number: it's hard to remember. I think the time-based releases (ie the "2 weeks of merge window until -rc1, followed by roughly two months of stabilization") has been so successful that I'd prefer to skip the version numbering model too. We don't do releases based on "features" any more, so why should we do version _numbering_ based on "features"?'" -
Drive-By Contributors to the Linux Kernel
eldavojohn writes "There's an interesting post over at the Kernel Trap that focuses on a man's attempt to find out how many one-time contributors Linux averages per release. Although imperfect due to some obvious unavoidable flaws, he got a few dirty numbers of 'never seen from agains' in the commits from patches 2.6.11 through 2.6.25 and the numbers are: {63, 148, 128, 92, 96, 122, 137, 140, 135, 95, 136, 153, 179, 179, 304}. This makes sense as another reader, Greg KH, pointed out that the distribution curve is tilted towards one-hit contributions, 'the distribution of all of our users are: 50% only contributed 1 patch; 25% contributed 2; 12% contributed 3; 6% contributed 4 and so on ...'" -
Removing the Big Kernel Lock
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.'" -
Linus Denounces NDISWrapper, Denies It GPL Status
eldavojohn writes "On message boards, Linus Torvalds was explaining why NDISWrapper is not eligible to be released under the GPL even though the project claims to be. Linus remarked, "Ndiswrapper itself is *not* compatible with the GPL. Trying to claim that ndiswrapper somehow itself is GPL'd even though it then loads modules that aren't is stupid and pointless. Clearly it just re-exports those GPLONLY functions to code that is *not* GPL'd." This all sprung up with someone restricted NDISWrapper's access to GPL-only symbols thereby breaking the utility. Linus merely replied that "If it loads non-GPL modules, it shouldn't be able to use GPLONLY symbols." As you may know, NDISWrapper implements Windows kernel API and then loads Windows binaries for a number of devices and runs them natively to avoid the cost and complication of emulation." -
Linux Kernel 2.6.24 Released
LinuxFan writes "Linus Torvalds has released the 2.6.24 Linux Kernel, noting that he and most of the other key Linux developers will be flying to a conference in Australia for the next week. As the whole team will be down under while the kernel is being tested by the masses, Linus added, "Let's hope it's a good one". What's new in the latest release includes an optimized CFQ scheduler, numerous new wireless drivers, tickless kernel support for the x86-64 and PPC architectures, and much more. Time to download and start compiling." -
Linux Kernel 2.6.24 Released
LinuxFan writes "Linus Torvalds has released the 2.6.24 Linux Kernel, noting that he and most of the other key Linux developers will be flying to a conference in Australia for the next week. As the whole team will be down under while the kernel is being tested by the masses, Linus added, "Let's hope it's a good one". What's new in the latest release includes an optimized CFQ scheduler, numerous new wireless drivers, tickless kernel support for the x86-64 and PPC architectures, and much more. Time to download and start compiling." -
What's New in OpenBSD 4.2?
blackbearnh writes "OpenBSD 4.2 was released today, and has a host of new features. O'Reilly's ONLamp site has a pretty thorough overview of the release. 'Even though security is still there, this release comes with some amazing performance improvements: basic benchmarks showed PF being twice as fast, a rewrite of the TLB shootdown code for i386 and amd64 cut the time to do a full package build by 20 percent (mostly because all the forks in configure scripts have become much cheaper), and the improved frequency scaling on MP systems can help save nearly 20 percent of battery power. And then the new features: FFS2, support for the Advanced Host Controller Interface, IP balancing in CARP, layer 7 manipulation with hoststated, Xenocara, and more!'" -
Virtualization Decreases Security
ParaFan writes "In a fascinating story on KernelTrap, Theo de Raadt asserts that while virtualization can increase hardware utilization, it does not in any way improve security. In fact, he contends the exact opposite is true: 'You are absolutely deluded, if not stupid, if you think that a worldwide collection of software engineers who can't write operating systems or applications without security holes, can then turn around and suddenly write virtualization layers without security holes.' de Raadt argues that the lack of support for process isolation on x86 hardware combined with numerous bugs in the architecture are a formula for virtualization decreasing overall security, not increasing it." -
Torvalds On Pluggable Security Models
eldavojohn writes "The KernelTrap highlights an interesting discussion on pluggable security models including some commentary by Linus Torvalds. While Torvalds argued against pluggable schedulers, he's all for pluggable security. Other members were voicing concerns with the pluggable nature of the Linux Security Model, but Torvalds put his foot down and said it stays. When asked why his stance was different between schedulers and security, he replied, 'Schedulers can be objectively tested. There's this thing called 'performance,' that can generally be quantified on a load basis. Yes, you can have crazy ideas in both schedulers and security. Yes, you can simplify both for a particular load. Yes, you can make mistakes in both. But the *discussion* on security seems to never get down to real numbers. So the difference between them is simple: one is hard science. The other one is people wanking around with their opinions.'" -
When Not to Use chroot
Hyena writes "Linux guru Alan Cox is quoted as saying 'chroot is not and never has been a security tool' in a KernelTrap article summarizing a lengthy thread on the Linux Kernel mailing list. The discussion began with a patch attempting to 'fix a security hole' in the Unix chroot command, trying to improve the ability of chroot to contain a process. When it was pointed out that people have been using chroot as a security tool for years, another kernel hacker retorted, 'incompetent people implementing security solutions are a real problem.' A quick search on the terms 'chroot+security' quickly reveals that many people have long thought (wrongly) that chroot's purpose was for improving security." -
When Not to Use chroot
Hyena writes "Linux guru Alan Cox is quoted as saying 'chroot is not and never has been a security tool' in a KernelTrap article summarizing a lengthy thread on the Linux Kernel mailing list. The discussion began with a patch attempting to 'fix a security hole' in the Unix chroot command, trying to improve the ability of chroot to contain a process. When it was pointed out that people have been using chroot as a security tool for years, another kernel hacker retorted, 'incompetent people implementing security solutions are a real problem.' A quick search on the terms 'chroot+security' quickly reveals that many people have long thought (wrongly) that chroot's purpose was for improving security." -
Software Freedom Law Center vs Theo de Raadt
An anonymous reader writes "In a recent public posting to the Linux Kernel mailing list the founder of the Software Freedom Law Center, Eben Moglen, lashed back at OpenBSD creator Theo de Raadt without actually mentioning his name. 'What has happened is that people who do not have full possession of the facts and have no legal expertise — people whom from the very beginning we have been trying to help — have made irresponsible charges and threatened lawsuits, thus slowing down our efforts to help them.' Moglen pointed out that they have and continue to help all open source projects, including OpenBSD, but the process takes time. 'The required work has been made more arduous because some people have chosen not to cooperate in good faith. But we will complete the work as soon as we can, and we will follow the community's practice of complete publication, so everyone can see all the evidence.'" -
Software Freedom Law Center vs Theo de Raadt
An anonymous reader writes "In a recent public posting to the Linux Kernel mailing list the founder of the Software Freedom Law Center, Eben Moglen, lashed back at OpenBSD creator Theo de Raadt without actually mentioning his name. 'What has happened is that people who do not have full possession of the facts and have no legal expertise — people whom from the very beginning we have been trying to help — have made irresponsible charges and threatened lawsuits, thus slowing down our efforts to help them.' Moglen pointed out that they have and continue to help all open source projects, including OpenBSD, but the process takes time. 'The required work has been made more arduous because some people have chosen not to cooperate in good faith. But we will complete the work as soon as we can, and we will follow the community's practice of complete publication, so everyone can see all the evidence.'" -
The Many Paths To Data Corruption
Runnin'Scared writes "Linux guru Alan Cox has a writeup on KernelTrap in which he talks about all the possible ways for data to get corrupted when being written to or read from a hard disk drive. This includes much of the information applicable to all operating systems. He prefaces his comments noting that the details are entirely device specific, then dives right into a fascinating and somewhat disturbing path tracing data from the drive, through the cable, into the bus, main memory and CPU cache. He also discusses the transfer of data via TCP and cautions, 'unfortunately lots of high performance people use checksum offload which removes much of the end to end protection and leads to problems with iffy cards and the like. This is well studied and known to be very problematic but in the market speed sells not correctness.'" -
Debating the Linux Process Scheduler
An anonymous reader writes "The Linux 2.6.23 kernel is expected around the end of the month, and will be the first to include Ingo Molnar's much debated rewrite of the process scheduler called the Completely Fair Scheduler. In another Linux kernel mailing list thread one more developer is complaining about Molnar and his new code. However, according to KernelTrap a number of other Linux developers have stood up to defend Molnar and call into question the motives of the complaints. It will be interesting to see how the new processor really performs when the 2.6.23 kernel is released." -
Debating the Linux Process Scheduler
An anonymous reader writes "The Linux 2.6.23 kernel is expected around the end of the month, and will be the first to include Ingo Molnar's much debated rewrite of the process scheduler called the Completely Fair Scheduler. In another Linux kernel mailing list thread one more developer is complaining about Molnar and his new code. However, according to KernelTrap a number of other Linux developers have stood up to defend Molnar and call into question the motives of the complaints. It will be interesting to see how the new processor really performs when the 2.6.23 kernel is released." -
Theo de Raadt On Relicensing BSD Code
iBSD writes "KernelTrap has an interesting article in which Theo de Raadt discusses the legal implications of the recent relicensing of OpenBSD's BSD-licensed Atheros driver under the GPL. De Raadt says, 'it has been like pulling teeth since (most) Linux wireless guys and the SFLC do not wish to admit fault. I think that the Linux wireless guys should really think hard about this problem, how they look, and the legal risks they place upon the future of their source code bodies.' He stressed that the theory that BSD code can simply be relicensed to the GPL without making significant changes to the code is false, adding, 'in their zeal to get the code under their own license, some of these Linux wireless developers have broken copyright law repeatedly. But to even get to the point where they broke copyright law, they had to bypass a whole series of ethical considerations too.'" -
Theo de Raadt On Relicensing BSD Code
iBSD writes "KernelTrap has an interesting article in which Theo de Raadt discusses the legal implications of the recent relicensing of OpenBSD's BSD-licensed Atheros driver under the GPL. De Raadt says, 'it has been like pulling teeth since (most) Linux wireless guys and the SFLC do not wish to admit fault. I think that the Linux wireless guys should really think hard about this problem, how they look, and the legal risks they place upon the future of their source code bodies.' He stressed that the theory that BSD code can simply be relicensed to the GPL without making significant changes to the code is false, adding, 'in their zeal to get the code under their own license, some of these Linux wireless developers have broken copyright law repeatedly. But to even get to the point where they broke copyright law, they had to bypass a whole series of ethical considerations too.'" -
GPL Hindering Two-Way Code Sharing?
An anonymous reader writes "KernelTrap has some fascinating coverage of the recent rift between the OpenBSD developers and the Linux kernel developers. Proponents of the GPL defend their license for enforcing that their code can always be shared. However in the current debate the GPL is being added to BSD-licensed code, thereby preventing it from being shared back with the original authors of the code. Thus, a share-and-share-alike license is effectively preventing two-way sharing." We discussed an instance of this one-way effect a few days back. -
The Really Fair Scheduler
derrida writes "During the many threads discussing Ingo Molnar's recently merged Completely Fair Scheduler, Roman Zippel has repeatedly questioned the complexity of the new process scheduler. In a recent posting to the Linux Kernel mailing list he offered a simpler scheduler named the 'Really Fair Scheduler' saying, 'As I already tried to explain previously CFS has a considerable algorithmic and computational complexity. This patch should now make it clearer, why I could so easily skip over Ingo's long explanation of all the tricks CFS uses to keep the computational overhead low — I simply don't need them.'" -
Replacing Atime With Relatime in the Kernel
eldavojohn writes "Our friend Jeremy at the Kernal Trap has dug up some interesting criticism of atime from Linus Torvalds. As Linus submitted patches to improve relatime he noted: 'I cannot over-emphasize how much of a deal it is in practice. Atime updates are by far the biggest IO performance deficiency that Linux has today. Getting rid of atime updates would give us more everyday Linux performance than all the pagecache speedups of the past 10 years, _combined_.' And later severely beat atime about the head with a pointed stick: 'It's also perhaps the most stupid Unix design idea of all times. Unix is really nice and well done, but think about this a bit: 'For every file that is read from the disk, lets do a ... write to the disk! And, for every file that is already cached and which we read from the cache ... do a write to the disk!'" Well, I guess I can expect my Linux machine to become a little bit faster!" -
Creative Documentation
FuriousCurio writes "Linux kernel hackers appear to be an endlessly creative group of individuals. In response to previous documentation attempts not having been read by many people, KernelTrap is reporting about how the lguest documentation was prepared to be something of an adventure story. Self-proclaimed to turn you into an lguest expert, lguest being one of the new solutions for running a virtual instance of the Linux operating system as a user process within a real instance of the Linux operating system, the documentation mixes humor and wit into puzzles, poetry, and of course source code and a low-level understanding of virtualization. But the questions remains, will making documentation more entertaining actually work to get people to read it?" -
Old School Linux Remembered, Parts 0.02 & 0.03
eldavojohn writes "Following our last history lesson of Linux 0.01, the Kernel Trap is talking about the following announcements that would lead to one of the greatest operating systems today. A great Linus quote on release 0.02 (just 19 days after 0.01): 'I can (well, almost) hear you asking yourselves "why?". Hurd will be out in a year (or two, or next month, who knows), and I've already got minix. This is a program for hackers by a hacker. I've enjoyed [sic] doing it, and somebody might enjoy looking at it and even modifying it for their own needs. It is still small enough to understand, use and modify, and I'm looking forward to any comments you might have.'" -
The Completely Fair Scheduler's Impact On Games
eldavojohn writes "We've heard a bit about the completely fair scheduler previously, but now Kernel Trap looks at the implications this new scheduler has for 3D games in Linux. Linus Torvalds noted, 'I don't think any scheduler is perfect, and almost all of the time, the RightAnswer(tm) ends up being not one or the other, but somewhere in between. But at the same time, no technical decision is ever written in stone. It's all a balancing act. I've replaced the scheduler before, I'm 100% sure we'll replace it again. Schedulers are actually not at all that important in the end: they are a very very small detail in the kernel.' The posts that follow the brief article, reveal that Linus seems quite confident that he made the right choice in his decision to merge CFS with the Linux kernel. One thing's for certain, gaming on Linux can't suffer any more setbacks or it may be many years before we see FOSS games rival the commercial world." -
Torvalds Explains Scheduler Decision
Firedog writes "There's been a lot of recent debate over why Linus Torvalds chose the new CFS process scheduler written by Ingo Molnar over the SD process scheduler written by Con Kolivas, ranging from discussing the quality of the code to favoritism and outright conspiracy theories. KernelTrap is now reporting Linus Torvalds' official stance as to why he chose the code that he did. 'People who think SD was "perfect" were simply ignoring reality,' Linus is quoted as saying. He goes on to explain that he selected the Completely Fair Scheduler because it had a maintainer who has proven himself willing and able to address problems as they are discovered. In the end, the relevance to normal Linux users is twofold: one is the question as to whether or not the Linux development model is working, and the other is the question as to whether the recently released 2.6.23 kernel will deliver an improved desktop experience." -
A Historical Look At The First Linux Kernel
LinuxFan writes "KernelTrap has a fascinating article about the first Linux kernel, version 0.01, complete with source code and photos of Linus Torvalds as a young man attending the University of Helsinki. Torvalds originally planned to call the kernel "Freax," and in his first announcement noted, "I'm doing a (free) operating system (just a hobby, won't be big and professional like gnu) for 386(486) AT clones." He also stressed that the kernel was very much tied to the i386 processor, "simply, I'd say that porting is impossible." Humble beginnings." -
OpenBSD Foundation Announced
OpenBDSfan writes "KernelTrap is reporting on the creation of the OpenBSD Foundation, a Canadian not-for-profit corporation intended to support OpenBSD and related projects, including OpenSSH, OpenBGPD, OpenNTPD, and OpenCVS. The announcement explains, "the OpenBSD Foundation will initially concentrate on facilitating larger donations of equipment, funds, documentation and resources. Small scale donations should continue to be submitted through the existing mechanisms."" -
GCC 4.2.1 Released
larry bagina writes "GCC 4.2.1 was released 4 days ago. Although this minor update would otherwise be insignificant, it will be the final GPL v2 release; all future releases will be GPL v3. Some key contributors are grumbling over this change and have privately discussed a fork to stay as GPL v2. The last time GCC forked (EGCS), the FSF conceded defeat. How will the FSF/GNU handle the GPL 3 revolt?" -
Linux Gains Two New Virtualization Solutions
An anonymous reader writes "The upcoming 2.6.23 kernel has gained two new virtualization solutions. According to KernelTrap, both Xen and lguest have been merged into the mainline kernel. These two virtualization solutions join the already merged KVM, offering Linux multiple ways to run multiple virtual machines each running their own OS." -
Linux Gains Two New Virtualization Solutions
An anonymous reader writes "The upcoming 2.6.23 kernel has gained two new virtualization solutions. According to KernelTrap, both Xen and lguest have been merged into the mainline kernel. These two virtualization solutions join the already merged KVM, offering Linux multiple ways to run multiple virtual machines each running their own OS." -
Linux Gains Two New Virtualization Solutions
An anonymous reader writes "The upcoming 2.6.23 kernel has gained two new virtualization solutions. According to KernelTrap, both Xen and lguest have been merged into the mainline kernel. These two virtualization solutions join the already merged KVM, offering Linux multiple ways to run multiple virtual machines each running their own OS." -
Secretly Monopolizing the CPU Without Being Root
An anonymous reader writes "This year's Usenix security symposium includes a paper that implements a "cheat" utility, which allows any non-privileged user to run his/her program, e.g., like so 'cheat 99% program' thereby insuring that the programs would get 99% of the CPU cycles, regardless of the presence of any other applications in the system, and in some cases (like Linux), in a way that keeps the program invisible from CPU monitoring tools (like 'top'). The utility exclusively uses standard interfaces and can be trivially implemented by any beginner non-privileged programmer. Recent efforts to improve the support for multimedia applications make systems more susceptible to the attack. All prevalent operating systems but Mac OS X are vulnerable, though by this kerneltrap story, it appears that the new CFS Linux scheduler attempts to address the problem that were raised by the paper." -
Linux Gets Completely Fair Scheduler
SchedFred writes "KernelTrap is reporting that CFS, Ingo Molnar's Completely Fair Scheduler, was just merged into the Linux kernel. The new CPU scheduler includes a pluggable framework that completely replaces Molnar's earlier O(1) scheduler, and is described to 'model an "ideal, precise multi-tasking CPU" on real hardware. CFS tries to run the task with the "gravest need" for more CPU time. So CFS always tries to split up CPU time between runnable tasks as close to "ideal multitasking hardware" as possible.' The new CPU scheduler should improve the desktop Linux experience, and will be part of the upcoming 2.6.23 kernel." -
Linux 2.6.22 Kernel Released
An anonymous reader writes "Linux creator Linus Torvalds announced the official release of the 2.6.22 kernel: 'It's out there now (or at least in the process of mirroring out — if you don't see everything, give it a bit of time).' The previous stable kernel, 2.6.21, was released a little over two months ago. New features in the 2.6.22 kernel include a SLUB allocator which replaces the slab allocator, a new wireless stack, a new Firewire stack, and support for the Blackfin architecture. Source-level changes can be tracked via the gitweb interface to Linus' kernel tree." -
The Completely Fair Scheduler
hichetu writes "Kernel trap has a nice summary of what is going on behind the scenes to change the Linux Scheduler. The O(1) Linux scheduler is going to be changed so that it is fair to interactive tasks. You will be surprised to know that O(1) is really too good not to have any side-effects on fairness to all tasks." -
Jens Axboe On Kernel Development
BlockHead writes "Kerneltrap.org is running an interview with Jens Axboe, 15 year Linux veteran and the maintainer of the linux kernel block layer, 'the piece of software that sits between the block device drivers (managing your hard drives, cdroms, etc) and the file systems.' The interview examines what's involved in maintaining this complex portion of the Linux kernel, and offers an accessible explanation of how IO schedulers work. Jens details his own CFQ, or Complete Fair Queue scheduler which is the default Linux IO scheduler. Finally, the article examines the current state of Linux kernel development, how it's changed over the years, and what's in store for the future." -
Root Exploit For NVIDIA Closed-Source Linux Driver
possible writes, "KernelTrap is reporting that the security research firm Rapid7 has published a working root exploit for a buffer overflow in NVIDIA's binary blob graphics driver for Linux. The NVIDIA drivers for FreeBSD and Solaris are also likely vulnerable. This will no doubt fuel the debate about whether binary blob drivers should be allowed in Linux." Rapid7's suggested action to mitigate this vulnerability: "Disable the binary blob driver and use the open-source 'nv' driver that is included by default with X." -
Intel Accused of Being an "Open Source Fraud"
Binary-Blob writes "Kernal Trap has an article up in which some key OpenBSD developers accuse Intel of being an open source fraud. The issue stems from the prevalence of firmware 'blobs' in open source projects, and OpenBSD's reluctance to use them unless they are distributed freely and without restrictions. Leading project creator Theo de Raadt offers that Intel should follow the example of other companies in the market: 'Intel must do this firmware grant in the same way that Adaptec, Atmel, Broadcom, Cirrus Logic, Cyclades, QLogic, Ralink, and LSI and lots of other companies have granted distribution firmware to be used by others.' He concluded by requesting that the open source community contact Intel to help get them to change their policies" -
OpenBSD Ahead of Linux for Wi-Fi Drivers
algae writes "It looks like some kernel developers have noticed that the OpenBSD project is including reverse-engineered drivers for wireless ethernet cards while Linux is still using binary blobs. A large part of the issue is that much OpenBSD development takes place abroad, where having to do clean-room reverse-engineering isn't as important." From the article: "Christoph Hellwig took another stance, 'please don't let this reverse engineering idiocy hinder wireless driver adoption, we're already falling far behind openbsd who are very successfully reverse engineering lots of wireless chipsets.'" -
2006 OpenBSD Hackathon Well Underway
An anonymous reader writes "KernelTrap is running a two part who's who at the 2006 OpenBSD Hackathon. Starting on the 27th and running for a full week, developers get together and concentrate on communication rather than just development. Project leader Theo de Raadt was quoted as saying 'I don't think anybody else does this, developers suspend their lives for a week to focus entirely on just development.'" -
2006 OpenBSD Hackathon Well Underway
An anonymous reader writes "KernelTrap is running a two part who's who at the 2006 OpenBSD Hackathon. Starting on the 27th and running for a full week, developers get together and concentrate on communication rather than just development. Project leader Theo de Raadt was quoted as saying 'I don't think anybody else does this, developers suspend their lives for a week to focus entirely on just development.'" -
Kernel Trap Interview with Theo de Raadt
An anonymous reader writes "KernelTrap has an insightful interview with Theo de Raadt, creator of OpenBSD. The wide-ranging interview focuses first on the past few years of OpenBSD development, then moves on to the recently released OpenBSD 3.9. De Raadt talks about how binary blobs threaten free software, and how OpenBSD developers work to reverse engineer them. He also talks about the future of OpenBSD, his views on Linux, and why developing truly free software is so important to him." -
Torvalds Has Harsh Words For FreeBSD Devs
An anonymous reader writes "In a relatively technical discussion about the merits of Copy On Write (COW) versus a very new Linux kernel system call named vmsplice(), Linux creator Linus Torvalds had some harsh words for Mach and FreeBSD developers that utilize COW: 'I claim that Mach people (and apparently FreeBSD) are incompetent idiots. Playing games with VM is bad. memory copies are _also_ bad, but quite frankly, memory copies often have _less_ downside than VM games, and bigger caches will only continue to drive that point home.' The discussion goes on to explain how the new vmsplice() avoids this extra overhead." -
OS Virtualization Interview
VirtualizationBuff writes "KernelTrap has a fascinating interview with Andrey Savochkin, the lead developer of the OpenVZ server virtualization project. In the interview Savochkin goes into great detail about how virtualization works, and why OpenVZ outshines the competition, comparing it to VServer, Xen and User Mode Linux. Regarding virtualization, Savochkin describes it as the next big step, 'comparable with the step between single-user and multi-user systems.' Savochkin is now focused on getting OpenVZ merged into the mainline Linux kernel." -
Zack Brown Taking a Break
Jon Dowland writes "Zack Brown's once-weekly Kernel Traffic summary of happenings on the linux kernel mailing list, is now on indefinite hiatus. From the announcement: 'Kernel Traffic has become more and more difficult over the years. From an average of 5 megs of email per week in 1999, the Linux kernel mailing list has gradually increased its traffic to 13 megs per week in 2005. Condensing that into 50 or 100 K of summaries each week has started to take more time than I have to give.' Fear not, because we still have kerneltrap and Linux Weekly News, amongst others. Zack still writes a regularly Kernel column for Linux Magazine and occasionally in others such as the UK Linux Format." -
Linus Says No to 'Specs'
auckland map writes to tell us about an interesting debate that is being featured on KernelTrap. Linus Torvalds raised a few eyebrows (and furrowed even more in confusion) by saying "A 'spec' is close to useless. I have _never_ seen a spec that was both big enough to be useful _and_ accurate. And I have seen _lots_ of total crap work that was based on specs. It's _the_ single worst way to write software, because it by definition means that the software was written to match theory, not reality." -
Interview With Reiser4 Author Hans Reiser
An anonymous reader writes "KernelTrap has an interesting interview with Hans Reiser, the author of two revolutionary Linux filesystems, Reiser3 and Reiser4. Reiser3 was the first journaling Linux filesystem. Reiser4 is a complete rewrite that is claimed to offer amazing performance and a new plugin architecture offering semantic enhancements to rival Microsoft's WinFS and Apple's Spotlight. Comparing Reiser4 to WinFS, Reiser says in the interview, "Reiser4 is a much more mature design, representing a 10 year effort"." -
2.6.13 Linux Kernel Released
LynuxFre@k writes "Linux Torvalds announced the release of the 2.6.13 Linux kernel. He noted that there was a major change to the x86 PCI code, and that while all bugs from the change were believed to be found during the release candidate phase, it's possible that some devices may have problems. From this release on, it is intended that major changes only be merged into the kernel within two weeks after a major release. The rest of the time will be spent fixing bugs, with the goal of both increasing overall stability and decreasing the amount of time between major releases. Download the latest Linux kernel from a kernel.org mirror." -
New Linux Kernel Development Process
An anonymous reader writes "Releasing the 2.6.13-rc4 Linux Kernel, Linus Torvalds announced an improved development process to try and minimize the number of bugs in the kernel. The general idea is simple: changes will only be allowed for two weeks after the release of a stable kernel. All the rest of the time between releases will be spent on fixing bugs. This should improve upon last year's development module, which allows for active development in the 2.6 stable kernel." -
New Linux Kernel Development Process
An anonymous reader writes "Releasing the 2.6.13-rc4 Linux Kernel, Linus Torvalds announced an improved development process to try and minimize the number of bugs in the kernel. The general idea is simple: changes will only be allowed for two weeks after the release of a stable kernel. All the rest of the time between releases will be spent on fixing bugs. This should improve upon last year's development module, which allows for active development in the 2.6 stable kernel."