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authorTony Luck <tony.luck@intel.com>2009-01-15 10:29:17 -0800
committerTony Luck <tony.luck@intel.com>2009-01-15 10:29:17 -0800
commit0773a6cf673316440999752e23f8c3d4f85e48b9 (patch)
tree2d42211a451efb114795f9c1c70810a86174ff3f /arch
parent7a0b6e01434f77194b86c8051b4c3718da636c64 (diff)
[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 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