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authorTony Luck <tony.luck@intel.com>2009-01-15 13:29:17 -0500
committerTony Luck <tony.luck@intel.com>2009-01-15 13:29:17 -0500
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 3d31636cbafb..6183aeccecf1 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -17,6 +17,7 @@ config IA64
17 select ACPI if (!IA64_HP_SIM) 17 select ACPI if (!IA64_HP_SIM)
18 select PM if (!IA64_HP_SIM) 18 select PM if (!IA64_HP_SIM)
19 select ARCH_SUPPORTS_MSI 19 select ARCH_SUPPORTS_MSI
20 select HAVE_UNSTABLE_SCHED_CLOCK
20 select HAVE_IDE 21 select HAVE_IDE
21 select HAVE_OPROFILE 22 select HAVE_OPROFILE
22 select HAVE_KPROBES 23 select HAVE_KPROBES