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| author | Frederic Weisbecker <fweisbec@gmail.com> | 2012-11-14 00:24:25 +0100 |
|---|---|---|
| committer | Frederic Weisbecker <fweisbec@gmail.com> | 2012-11-19 16:41:32 +0100 |
| commit | e3942ba04052364d3c6454103362cafd87456010 (patch) | |
| tree | 31e5cd4013fd140cb3e50ad6147382798bc88631 /arch/ia64 | |
| parent | vtime: Explicitly account pending user time on process tick (diff) | |
| download | linux-e3942ba04052364d3c6454103362cafd87456010.tar.xz linux-e3942ba04052364d3c6454103362cafd87456010.zip | |
vtime: Consolidate a bit the ctx switch code
On ia64 and powerpc, vtime context switch only consists
in flushing system and user pending time, plus a few
arch housekeeping.
Consolidate that into a generic implementation. s390 is
a special case because pending user and system time accounting
there is hard to dissociate. So it's keeping its own implementation.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Reviewed-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Diffstat (limited to 'arch/ia64')
| -rw-r--r-- | arch/ia64/include/asm/cputime.h | 2 | ||||
| -rw-r--r-- | arch/ia64/kernel/time.c | 9 |
2 files changed, 3 insertions, 8 deletions
diff --git a/arch/ia64/include/asm/cputime.h b/arch/ia64/include/asm/cputime.h index 3deac956d325..7fcf7f08ab06 100644 --- a/arch/ia64/include/asm/cputime.h +++ b/arch/ia64/include/asm/cputime.h @@ -103,5 +103,7 @@ static inline void cputime_to_timeval(const cputime_t ct, struct timeval *val) #define cputime64_to_clock_t(__ct) \ cputime_to_clock_t((__force cputime_t)__ct) +extern void arch_vtime_task_switch(struct task_struct *tsk); + #endif /* CONFIG_VIRT_CPU_ACCOUNTING */ #endif /* __IA64_CPUTIME_H */ diff --git a/arch/ia64/kernel/time.c b/arch/ia64/kernel/time.c index 834c78bd3b5f..c9a7d2ebe089 100644 --- a/arch/ia64/kernel/time.c +++ b/arch/ia64/kernel/time.c @@ -100,18 +100,11 @@ void vtime_account_user(struct task_struct *tsk) * accumulated times to the current process, and to prepare accounting on * the next process. */ -void vtime_task_switch(struct task_struct *prev) +void arch_vtime_task_switch(struct task_struct *prev) { struct thread_info *pi = task_thread_info(prev); struct thread_info *ni = task_thread_info(current); - if (idle_task(smp_processor_id()) != prev) - vtime_account_system(prev); - else - vtime_account_idle(prev); - - vtime_account_user(prev); - pi->ac_stamp = ni->ac_stamp; ni->ac_stime = ni->ac_utime = 0; } |