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由 Thomas Gleixner 提交于
Writing 'off' to /sys/devices/system/cpu/smt/control offlines all SMT siblings. Writing 'on' merily enables the abilify to online them, but does not online them automatically. Make 'on' more useful by onlining all offline siblings. Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
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