Linked by JRepin on Mon 29th Apr 2013 09:24 UTC
Linux After ten weeks of development Linus Torvalds has announced the release of Linux kernel 3.9. The latest version of the kernel now has a device mapper target which allows a user to setup an SSD as a cache for hard disks to boost disk performance under load. There's also kernel support for multiple processes waiting for requests on the same port, a feature which will allow it to distribute server work better across multiple CPU cores. KVM virtualisation is now available on ARM processors and RAID 5 and 6 support has been added to Btrfs's existing RAID 0 and 1 handling. Linux 3.9 also has a number of new and improved drivers which means the kernel now supports the graphics cores in AMD's next generation of APUs and also works with the high-speed 802.11ac Wi-Fi chips which will likely appear in Intel's next mobile platform. Read more about new features in What's new in Linux 3.9.
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RE[6]: Load of works there
by Alfman on Tue 30th Apr 2013 12:19 UTC in reply to "RE[5]: Load of works there"
Alfman
Member since:
2011-01-28

Brendan,

"The only thing we can really say from this comparison is that very fortunate timing is far more important than anything else. It doesn't say anything about monolithic vs. micro-kernel. If Minix 3 was released in 1991 and Linux was released in 2005, then I doubt anyone would know what Linux was."


Very true, timing was everything. The same is even true of the commercial players as well. In early computing history, there were many competitors. Over time they consolidate and fall to the point were we only have a few options. For better or worse, it would take insane loads of money to budge the current market leaders and get consumers to discard their collective investments in incumbent technologies.

Userspace/Kernel context switches used to be much more expensive, so that may have been a historical factor in microkernels pulling ahead. As CPUs have evolved, this should eliminate the original monolithic kernel motivation, but it's stuck around because alternatives have been marginalized in the market.

http://kerneltrap.org/node/531
(Anyone having more recent benchmarks?)


It's funny that whenever I've talked about being able to write operating systems to less-technical people, many automatically equate that to being filthy rich and they don't realize how many of us there are who struggle to find any work on OS tech. We would be just as good, but we're too late.

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