From 0773a6cf673316440999752e23f8c3d4f85e48b9 Mon Sep 17 00:00:00 2001 From: Tony Luck Date: Thu, 15 Jan 2009 10:29:17 -0800 Subject: [IA64] Turn on CONFIG_HAVE_UNSTABLE_CLOCK sched_clock() on ia64 is based on ar.itc, so is never completely synchronized between cpus. On some platforms (e.g. certain models of SGI Altix) it may be running at radically different frequencies. Based on a patch from Dimitri Sivanich which set this just for SN2 && GENERIC kernels ... it is needed for all ia64 machines. Signed-off-by: Tony Luck --- arch/ia64/Kconfig | 1 + 1 file changed, 1 insertion(+) (limited to 'arch') diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig index 3d31636cbaf..6183aeccecf 100644 --- a/arch/ia64/Kconfig +++ b/arch/ia64/Kconfig @@ -17,6 +17,7 @@ config IA64 select ACPI if (!IA64_HP_SIM) select PM if (!IA64_HP_SIM) select ARCH_SUPPORTS_MSI + select HAVE_UNSTABLE_SCHED_CLOCK select HAVE_IDE select HAVE_OPROFILE select HAVE_KPROBES -- cgit v1.2.3-18-g5258