diff options
| author | Tony Breeds <tony@bakeyournoodle.com> | 2007-12-04 16:51:44 +1100 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2007-12-06 16:08:59 +1100 |
| commit | 81a3843f97cff5fef7b6006fcd2d015d3c4b569f (patch) | |
| tree | 1175e61f0c23f935d522996220967e81b6e92880 | |
| parent | 7e1fb765c613298d861f80fa18af26df87a4ec19 (diff) | |
[POWERPC] Fix hardware IRQ time accounting problem.
The commit fa13a5a1f25f671d084d8884be96fc48d9b68275 (sched: restore
deterministic CPU accounting on powerpc), unconditionally calls
update_process_tick() in system context. In the deterministic
accounting case this is the correct thing to do. However, in the
non-deterministic accounting case we need to not do this, since doing
this results in the time accounted as hardware irq time being
artificially elevated.
Also this collapses 2 consecutive '#ifdef CONFIG_VIRT_CPU_ACCOUNTING'
checks in time.h into one for neatness.
Signed-off-by: Tony Breeds <tony@bakeyournoodle.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
| -rw-r--r-- | arch/powerpc/kernel/process.c | 2 | ||||
| -rw-r--r-- | include/asm-powerpc/time.h | 8 |
2 files changed, 3 insertions, 7 deletions
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index 41e13f4cc6e..b9d88374f14 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -350,7 +350,7 @@ struct task_struct *__switch_to(struct task_struct *prev, local_irq_save(flags); account_system_vtime(current); - account_process_tick(current, 0); + account_process_vtime(current); calculate_steal_time(); last = _switch(old_thread, new_thread); diff --git a/include/asm-powerpc/time.h b/include/asm-powerpc/time.h index 780f8264275..ce5de6e0e69 100644 --- a/include/asm-powerpc/time.h +++ b/include/asm-powerpc/time.h @@ -237,18 +237,14 @@ struct cpu_usage { DECLARE_PER_CPU(struct cpu_usage, cpu_usage_array); -#ifdef CONFIG_VIRT_CPU_ACCOUNTING -extern void account_process_vtime(struct task_struct *tsk); -#else -#define account_process_vtime(tsk) do { } while (0) -#endif - #if defined(CONFIG_VIRT_CPU_ACCOUNTING) extern void calculate_steal_time(void); extern void snapshot_timebases(void); +#define account_process_vtime(tsk) account_process_tick(tsk, 0) #else #define calculate_steal_time() do { } while (0) #define snapshot_timebases() do { } while (0) +#define account_process_vtime(tsk) do { } while (0) #endif extern void secondary_cpu_time_init(void); |