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| author |   Ingo Molnar <mingo@kernel.org> | 2012-12-08 15:44:43 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2012-12-08 15:44:43 +0100 |
| commit | 38130ec08716ae2ece8060eca01607b58da7258c (patch) | |
| tree | 71d0cd76ccfb2b960ddb6b820850269265389052 /arch/s390 | |
| parent | Merge tag 'cputime-adjustment-cleanups' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks into sched/core (diff) | |
| parent | vtime: Warn if irqs aren't disabled on system time accounting APIs (diff) | |
| download | linux-dev-38130ec08716ae2ece8060eca01607b58da7258c.tar.xz linux-dev-38130ec08716ae2ece8060eca01607b58da7258c.zip | |
Merge tag 'sched-cputime-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks into sched/core
Pull more cputime cleanups from Frederic Weisbecker:
* Get rid of underscores polluting the vtime namespace
* Consolidate context switch and tick handling
* Improve debuggability by detecting irq unsafe callers
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/include/asm/cputime.h | 1 | ||||
| -rw-r--r-- | arch/s390/kernel/vtime.c | 13 |
2 files changed, 11 insertions, 3 deletions
diff --git a/arch/s390/include/asm/cputime.h b/arch/s390/include/asm/cputime.h index 023d5ae24482..d2ff41370c0c 100644 --- a/arch/s390/include/asm/cputime.h +++ b/arch/s390/include/asm/cputime.h @@ -14,6 +14,7 @@ #define __ARCH_HAS_VTIME_ACCOUNT +#define __ARCH_HAS_VTIME_TASK_SWITCH /* We want to use full resolution of the CPU timer: 2**-12 micro-seconds. */ diff --git a/arch/s390/kernel/vtime.c b/arch/s390/kernel/vtime.c index 783e988c4e1e..e84b8b68444a 100644 --- a/arch/s390/kernel/vtime.c +++ b/arch/s390/kernel/vtime.c @@ -112,7 +112,12 @@ void vtime_task_switch(struct task_struct *prev) S390_lowcore.system_timer = ti->system_timer; } -void account_process_tick(struct task_struct *tsk, int user_tick) +/* + * In s390, accounting pending user time also implies + * accounting system time in order to correctly compute + * the stolen time accounting. + */ +void vtime_account_user(struct task_struct *tsk) { if (do_account_vtime(tsk, HARDIRQ_OFFSET)) virt_timer_expire(); @@ -127,6 +132,8 @@ void vtime_account(struct task_struct *tsk) struct thread_info *ti = task_thread_info(tsk); u64 timer, system; + WARN_ON_ONCE(!irqs_disabled()); + timer = S390_lowcore.last_update_timer; S390_lowcore.last_update_timer = get_vtimer(); S390_lowcore.system_timer += timer - S390_lowcore.last_update_timer; @@ -140,9 +147,9 @@ void vtime_account(struct task_struct *tsk) } EXPORT_SYMBOL_GPL(vtime_account); -void __vtime_account_system(struct task_struct *tsk) +void vtime_account_system(struct task_struct *tsk) __attribute__((alias("vtime_account"))); -EXPORT_SYMBOL_GPL(__vtime_account_system); +EXPORT_SYMBOL_GPL(vtime_account_system); void __kprobes vtime_stop_cpu(void) { |