diff options
| author | Tony Luck <tony.luck@intel.com> | 2009-01-15 10:29:17 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-01-24 16:36:21 -0800 |
| commit | e377565b19b465b307c7924438b768517dab8a6a (patch) | |
| tree | f920848b6701c97d42f1efc9a8db7f3bb67fae35 /arch | |
| parent | 42e54f6093af41dbb7a9651cab819b05bb9cd808 (diff) | |
IA64: Turn on CONFIG_HAVE_UNSTABLE_CLOCK
commit 0773a6cf673316440999752e23f8c3d4f85e48b9 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/ia64/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig index 48e496fe1e7..fb7e69cb47f 100644 --- a/arch/ia64/Kconfig +++ b/arch/ia64/Kconfig @@ -15,6 +15,7 @@ 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 |