Now that the scheduler domain degeneration patch from Suresh Siddha was merged in the main line kernel for a while, it is safe to turn on CONFIG_SMT broadly. It has zero run time cost on system that doesn't have SMT because the SD degenerator will collapse needless domains. Signed-off-by: Ken Chen <kenneth.w.chen@intel.com> cc: Suresh Siddha <suresh.b.siddha@intel.com> --- ./arch/ia64/defconfig.orig 2006-01-26 18:40:54.579699555 -0800 +++ ./arch/ia64/defconfig 2006-01-26 18:46:31.865828235 -0800 @@ -100,7 +100,7 @@ CONFIG_FORCE_MAX_ZONEORDER=18 CONFIG_SMP=y CONFIG_NR_CPUS=512 CONFIG_HOTPLUG_CPU=y -# CONFIG_SCHED_SMT is not set +CONFIG_SCHED_SMT=y # CONFIG_PREEMPT is not set CONFIG_SELECT_MEMORY_MODEL=y # CONFIG_FLATMEM_MANUAL is not set --- ./arch/ia64/Kconfig.orig 2006-01-26 18:41:09.734972806 -0800 +++ ./arch/ia64/Kconfig 2006-01-26 18:43:35.204697587 -0800 @@ -266,7 +266,7 @@ config HOTPLUG_CPU config SCHED_SMT bool "SMT scheduler support" depends on SMP - default off + default y help Improves the CPU scheduler's decision making when dealing with Intel IA64 chips with MultiThreading at a cost of slightly increased - To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.htmlReceived on Fri Jan 27 13:10:24 2006
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