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sched/cputime: Clean up the old vtime gen irqtime accounting completely

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Vtime generic irqtime accounting has been removed but there are a few
remnants to clean up:

* The vtime_accounting_cpu_enabled() check in irq entry was only used
  by CONFIG_VIRT_CPU_ACCOUNTING_GEN. We can safely remove it.

* Without the vtime_accounting_cpu_enabled(), we no longer need to
  have a vtime_common_account_irq_enter() indirect function.

* Move vtime_account_irq_enter() implementation under
  CONFIG_VIRT_CPU_ACCOUNTING_NATIVE which is the last user.

* The vtime_account_user() call was only used on irq entry for
  CONFIG_VIRT_CPU_ACCOUNTING_GEN. We can remove that too.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Radim Krcmar <rkrcmar@redhat.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Wanpeng Li <wanpeng.li@hotmail.com>
Link: http://lkml.kernel.org/r/1468421405-20056-4-git-send-email-fweisbec@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Frederic Weisbecker 2016-07-13 16:50:03 +02:00 committed by Ingo Molnar
parent b58c358405
commit 0cfdf9a198
2 changed files with 10 additions and 34 deletions
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11
include/linux/vtime.h
View File

@ -14,18 +14,7 @@ struct task_struct;
*/
#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
static inline bool vtime_accounting_cpu_enabled(void) { return true; }
#ifdef __ARCH_HAS_VTIME_ACCOUNT
extern void vtime_account_irq_enter(struct task_struct *tsk);
#else
extern void vtime_common_account_irq_enter(struct task_struct *tsk);
static inline void vtime_account_irq_enter(struct task_struct *tsk)
{
if (vtime_accounting_cpu_enabled())
vtime_common_account_irq_enter(tsk);
}
#endif /* __ARCH_HAS_VTIME_ACCOUNT */
#endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN

33
kernel/sched/cputime.c
View File

@ -431,6 +431,10 @@ void vtime_common_task_switch(struct task_struct *prev)
}
#endif
#endif /* CONFIG_VIRT_CPU_ACCOUNTING */
#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
/*
* Archs that account the whole time spent in the idle task
* (outside irq) as idle time can rely on this and just implement
@ -440,33 +444,16 @@ void vtime_common_task_switch(struct task_struct *prev)
* vtime_account().
*/
#ifndef __ARCH_HAS_VTIME_ACCOUNT
void vtime_common_account_irq_enter(struct task_struct *tsk)
void vtime_account_irq_enter(struct task_struct *tsk)
{
if (!in_interrupt()) {
/*
* If we interrupted user, context_tracking_in_user()
* is 1 because the context tracking don't hook
* on irq entry/exit. This way we know if
* we need to flush user time on kernel entry.
*/
if (context_tracking_in_user()) {
vtime_account_user(tsk);
return;
}
if (is_idle_task(tsk)) {
vtime_account_idle(tsk);
return;
}
}
vtime_account_system(tsk);
if (!in_interrupt() && is_idle_task(tsk))
vtime_account_idle(tsk);
else
vtime_account_system(tsk);
}
EXPORT_SYMBOL_GPL(vtime_common_account_irq_enter);
EXPORT_SYMBOL_GPL(vtime_account_irq_enter);
#endif /* __ARCH_HAS_VTIME_ACCOUNT */
#endif /* CONFIG_VIRT_CPU_ACCOUNTING */
#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
void task_cputime_adjusted(struct task_struct *p, cputime_t *ut, cputime_t *st)
{
*ut = p->utime;