KernelTrap: 2.6.21-rc1, Dynticks Merged
Feb 22, 2007, 15:15 (0 Talkback[s])
"Linus Torvalds announced the first release candidate for the
upcoming 2.6.21 kernel, ending the two-week merge window, 'there's
a lot of changes, as is usual for an -rc1 thing, but at least so
far it would seem that 2.6.20 has been a good base, and I don't
think we have anything *really* scary here.' Linus noted that the
tickless kernel patch was finally merged into the mainline kernel,
'the most interesting core change may be the dyntick/nohz one,
where timer ticks will only happen when needed. It's been brewing
for a _loong_ time, but it's in the standard kernel now as an
option.' Thomas Gleixner explained a year ago how this could result
in cooler CPUs and power savings, 'the tickless kernel feature
(CONFIG_NO_HZ) enables 'on-demand' timer interrupts: if there is no
timer to be expired for say 1.5 seconds when the system goes idle,
then the system will stay totally idle for 1.5 seconds...'"
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