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[PATCH] sched: arch preempt notifier mechanism

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This adds a general mechanism whereby a task can request the scheduler to
notify it whenever it is preempted or scheduled back in.  This allows the
task to swap any special-purpose registers like the fpu or Intel's VT
registers.

Signed-off-by: Avi Kivity <[email protected]>
[ [email protected]: fixes, cleanups ]
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Avi Kivity 2007-07-26 13:40:43 +02:00 • committed by Ingo Molnar
commit e107be36ef
4 changed files with 123 additions and 2 deletions
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3
kernel/Kconfig.preempt
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@ -63,3 +63,6 @@ config PREEMPT_BKL
Say Y here if you are building a kernel for a desktop system.
Say N if you are unsure.
config PREEMPT_NOTIFIERS
bool