Enabled the CONFIG_SCHED_MC option to allow multi-core scheduling for
i386, ia64 and sparc (it is already enabled for x86_64) to allow one to
turn on multi core power savings by:
echo 1 > /sys/devices/system/cpu/sched_mc_power_savings
Although grep CONFIG_SCHED_MC /boot/config-2.6.24-5-generic does yields
CONFIG_SCHED_MC=y, it seems that it isn't actually enabled.
Rebuilt (2.6.24-7.13) with CONFIG_SCHED_MC enabled. When tested on i386
platform, on an "idle" dual core Centrino powertop shows a drop of
"Rescheduling Interrupts" from 11% (not enabled) to ~4% (enabled), shows
minor power saving improvement.
** Changed in: linux (Ubuntu)
Status: Triaged => Fix Committed
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Kernel 2.6.24-2 causing ~1000 wakeups by "Rescheduling Interrupts"
https://bugs.launchpad.net/bugs/177895
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