The upgrade to version 4.0 of the Linux kernel happened quietly over the weekend, less a huge step forward than an incremental improvement.  The most interesting feature for those who support Linux boxes will be the non-disruptive kernel patching, allowing you to apply patches without causing downtime; assuming you properly tested the patches that is.  As well support for Intel's new Quark processor has been added and support for the Z13 found in IBM machines has also been improved.  It was hinted to The Inquirer that version 4.1 is likely to see far more changes incorporated in its release.

"The new number isn't a sign of a major upgrade. As we've chronicled, Torvalds thinks that it looks a bit silly when version numbers go beyond x.19. He therefore decided it would be best to tick over from 3.19 to 4.0 for the sake of neatness, rather than to celebrate any particular milestone in the kernel."

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