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| author | Isaku Yamahata <yamahata@valinux.co.jp> | 2009-03-04 21:05:40 +0900 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2009-03-26 10:50:42 -0700 |
| commit | f927da178671a824cf6c530f0623544206387e57 (patch) | |
| tree | fb9178ff79bfd9ee3b396ff20018eacbfb222d47 /arch/ia64/kernel/time.c | |
| parent | 496203b15b7249599712525c2b6aafe231b4628d (diff) | |
| download | op-kernel-dev-f927da178671a824cf6c530f0623544206387e57.zip op-kernel-dev-f927da178671a824cf6c530f0623544206387e57.tar.gz | |
ia64/pv_ops/pv_time_ops: add sched_clock hook.
add sched_clock() hook to paravirtualize sched_clock().
ia64 sched_clock() is based on ar.itc which isn't stable
on virtualized environment because vcpu may move around on
pcpus. So it needs paravirtualization.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch/ia64/kernel/time.c')
| -rw-r--r-- | arch/ia64/kernel/time.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/ia64/kernel/time.c b/arch/ia64/kernel/time.c index f0ebb34..c323c7b 100644 --- a/arch/ia64/kernel/time.c +++ b/arch/ia64/kernel/time.c @@ -50,6 +50,15 @@ EXPORT_SYMBOL(last_cli_ip); #endif #ifdef CONFIG_PARAVIRT +/* We need to define a real function for sched_clock, to override the + weak default version */ +unsigned long long sched_clock(void) +{ + return paravirt_sched_clock(); +} +#endif + +#ifdef CONFIG_PARAVIRT static void paravirt_clocksource_resume(void) { |
