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sched/cputime: Rename vtime_account_user() to vtime_flush()

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CONFIG_VIRT_CPU_ACCOUNTING_NATIVE=y used to accumulate user time and
account it on ticks and context switches only through the
vtime_account_user() function.

Now this model has been generalized on the 3 archs for all kind of
cputime (system, irq, ...) and all the cputime flushing happens under
vtime_account_user().

So let's rename this function to better reflect its new role.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Stanislaw Gruszka <sgruszka@redhat.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Wanpeng Li <wanpeng.li@hotmail.com>
Link: http://lkml.kernel.org/r/1483636310-6557-11-git-send-email-fweisbec@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Frederic Weisbecker 2017-01-05 18:11:50 +01:00 committed by Ingo Molnar
parent b7394a5f4c
commit c8d7dabf8f
6 changed files with 11 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/ia64/kernel/time.c
View File

@ -61,7 +61,7 @@ static struct clocksource *itc_clocksource;
extern cputime_t cycle_to_cputime(u64 cyc);
void vtime_account_user(struct task_struct *tsk)
void vtime_flush(struct task_struct *tsk)
{
struct thread_info *ti = task_thread_info(tsk);
cputime_t delta;

6
arch/powerpc/kernel/time.c
View File

@ -382,15 +382,13 @@ void vtime_account_idle(struct task_struct *tsk)
}
/*
* Transfer the user time accumulated in the paca
* by the exception entry and exit code to the generic
* process user time records.
* Account the whole cputime accumulated in the paca
* Must be called with interrupts disabled.
* Assumes that vtime_account_system/idle() has been called
* recently (i.e. since the last entry from usermode) so that
* get_paca()->user_time_scaled is up to date.
*/
void vtime_account_user(struct task_struct *tsk)
void vtime_flush(struct task_struct *tsk)
{
struct cpu_accounting_data *acct = get_accounting(tsk);

2
arch/s390/kernel/vtime.c
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@ -214,7 +214,7 @@ void vtime_task_switch(struct task_struct *prev)
* accounting system time in order to correctly compute
* the stolen time accounting.
*/
void vtime_account_user(struct task_struct *tsk)
void vtime_flush(struct task_struct *tsk)
{
if (do_account_vtime(tsk))
virt_timer_expire();

2
include/linux/kernel_stat.h
View File

@ -89,7 +89,7 @@ extern void account_idle_time(cputime_t);
#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
static inline void account_process_tick(struct task_struct *tsk, int user)
{
vtime_account_user(tsk);
vtime_flush(tsk);
}
#else
extern void account_process_tick(struct task_struct *, int user);

7
include/linux/vtime.h
View File

@ -58,27 +58,28 @@ static inline void vtime_task_switch(struct task_struct *prev)
extern void vtime_account_system(struct task_struct *tsk);
extern void vtime_account_idle(struct task_struct *tsk);
extern void vtime_account_user(struct task_struct *tsk);
#else /* !CONFIG_VIRT_CPU_ACCOUNTING */
static inline void vtime_task_switch(struct task_struct *prev) { }
static inline void vtime_account_system(struct task_struct *tsk) { }
static inline void vtime_account_user(struct task_struct *tsk) { }
#endif /* !CONFIG_VIRT_CPU_ACCOUNTING */
#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
extern void arch_vtime_task_switch(struct task_struct *tsk);
extern void vtime_account_user(struct task_struct *tsk);
extern void vtime_user_enter(struct task_struct *tsk);
static inline void vtime_user_exit(struct task_struct *tsk)
{
vtime_account_user(tsk);
}
extern void vtime_guest_enter(struct task_struct *tsk);
extern void vtime_guest_exit(struct task_struct *tsk);
extern void vtime_init_idle(struct task_struct *tsk, int cpu);
#else /* !CONFIG_VIRT_CPU_ACCOUNTING_GEN */
static inline void vtime_account_user(struct task_struct *tsk) { }
static inline void vtime_user_enter(struct task_struct *tsk) { }
static inline void vtime_user_exit(struct task_struct *tsk) { }
static inline void vtime_guest_enter(struct task_struct *tsk) { }
@ -93,9 +94,11 @@ static inline void vtime_account_irq_exit(struct task_struct *tsk)
/* On hard|softirq exit we always account to hard|softirq cputime */
vtime_account_system(tsk);
}
extern void vtime_flush(struct task_struct *tsk);
#else /* !CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
static inline void vtime_account_irq_enter(struct task_struct *tsk) { }
static inline void vtime_account_irq_exit(struct task_struct *tsk) { }
static inline void vtime_flush(struct task_struct *tsk) { }
#endif

4
kernel/sched/cputime.c
View File

@ -437,9 +437,7 @@ void vtime_common_task_switch(struct task_struct *prev)
else
vtime_account_system(prev);
#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
vtime_account_user(prev);
#endif
vtime_flush(prev);
arch_vtime_task_switch(prev);
}
#endif