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authorTony Luck <tony.luck@intel.com>2009-01-15 19:29:17 +0100
committerTony Luck <tony.luck@intel.com>2009-01-15 19:29:17 +0100
commit0773a6cf673316440999752e23f8c3d4f85e48b9 (patch)
tree2d42211a451efb114795f9c1c70810a86174ff3f /arch
parent[IA64] Update to use account_{steal,idle}_ticks (diff)
downloadlinux-0773a6cf673316440999752e23f8c3d4f85e48b9.tar.xz
linux-0773a6cf673316440999752e23f8c3d4f85e48b9.zip
[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 <tony.luck@intel.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/ia64/Kconfig1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 3d31636cbafb..6183aeccecf1 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