Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=81a3843f97cff5fef7b6006fcd2d015d3c4b569f Commit: 81a3843f97cff5fef7b6006fcd2d015d3c4b569f Parent: 7e1fb765c613298d861f80fa18af26df87a4ec19 Author: Tony Breeds <[EMAIL PROTECTED]> AuthorDate: Tue Dec 4 16:51:44 2007 +1100 Committer: Paul Mackerras <[EMAIL PROTECTED]> CommitDate: Thu Dec 6 16:08:59 2007 +1100
[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 <[EMAIL PROTECTED]> Signed-off-by: Paul Mackerras <[EMAIL PROTECTED]> --- arch/powerpc/kernel/process.c | 2 +- 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 41e13f4..b9d8837 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 780f826..ce5de6e 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); - To unsubscribe from this list: send the line "unsubscribe git-commits-head" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html