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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2008-12-31 17:11:40 +0300 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2008-12-31 17:11:47 +0300 |
| commit | 6f43092441bda528dd38f2dc6c1e2522c5079fb7 (patch) | |
| tree | e8bba1cf80b19be3e3658b9351b32469ba8c6bac /arch/s390/kernel/vtime.c | |
| parent | aa5e97ce4bbc9d5daeec16b1d15bb3f6b7b4f4d4 (diff) | |
| download | linux-6f43092441bda528dd38f2dc6c1e2522c5079fb7.tar.xz | |
[PATCH] improve precision of idle time detection.
Increase the precision of the idle time calculation that is exported
to user space via /sys/devices/system/cpu/cpu<x>/idle_time_us
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/vtime.c')
| -rw-r--r-- | arch/s390/kernel/vtime.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/s390/kernel/vtime.c b/arch/s390/kernel/vtime.c index 1254a4d0d762..25d21fef76ba 100644 --- a/arch/s390/kernel/vtime.c +++ b/arch/s390/kernel/vtime.c @@ -112,6 +112,7 @@ EXPORT_SYMBOL_GPL(account_system_vtime); static inline void set_vtimer(__u64 expires) { + struct vtimer_queue *vq = &__get_cpu_var(virt_cpu_timer); __u64 timer; asm volatile (" STPT %0\n" /* Store current cpu timer value */ @@ -121,7 +122,7 @@ static inline void set_vtimer(__u64 expires) S390_lowcore.last_update_timer = expires; /* store expire time for this CPU timer */ - __get_cpu_var(virt_cpu_timer).to_expire = expires; + vq->to_expire = expires; } void vtime_start_cpu_timer(void) |