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| author | Ingo Molnar <mingo@kernel.org> | 2013-03-08 19:41:22 +0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2013-03-08 19:41:22 +0400 |
| commit | 4e3da46797f8e4d8217d2e3d6857444391b306da (patch) | |
| tree | 4532f3bec8e45fbc69cc8389c4c7316d3eba7ae4 /include | |
| parent | 27b4b9319a3c2e8654d45df99ce584c7c2cfe100 (diff) | |
| parent | 8b43876643a737bb74a0e1e557f634eb2453948b (diff) | |
| download | linux-4e3da46797f8e4d8217d2e3d6857444391b306da.tar.xz | |
Merge branch 'sched/cputime' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks into sched/core
Pull cputime changes from Frederic Weisbecker:
* Generalize exception handling
* Fix race in context tracking state restore on return from exception
and irq exit kernel preemption
* Fix cputime scaling in full dynticks accounting dynamic off-case
* Fix default Kconfig value
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/context_tracking.h | 24 | ||||
| -rw-r--r-- | include/linux/sched.h | 4 |
2 files changed, 24 insertions, 4 deletions
diff --git a/include/linux/context_tracking.h b/include/linux/context_tracking.h index b28d161c1091..365f4a61bf04 100644 --- a/include/linux/context_tracking.h +++ b/include/linux/context_tracking.h @@ -1,9 +1,9 @@ #ifndef _LINUX_CONTEXT_TRACKING_H #define _LINUX_CONTEXT_TRACKING_H -#ifdef CONFIG_CONTEXT_TRACKING #include <linux/sched.h> #include <linux/percpu.h> +#include <asm/ptrace.h> struct context_tracking { /* @@ -13,12 +13,13 @@ struct context_tracking { * may be further optimized using static keys. */ bool active; - enum { + enum ctx_state { IN_KERNEL = 0, IN_USER, } state; }; +#ifdef CONFIG_CONTEXT_TRACKING DECLARE_PER_CPU(struct context_tracking, context_tracking); static inline bool context_tracking_in_user(void) @@ -33,12 +34,31 @@ static inline bool context_tracking_active(void) extern void user_enter(void); extern void user_exit(void); + +static inline enum ctx_state exception_enter(void) +{ + enum ctx_state prev_ctx; + + prev_ctx = this_cpu_read(context_tracking.state); + user_exit(); + + return prev_ctx; +} + +static inline void exception_exit(enum ctx_state prev_ctx) +{ + if (prev_ctx == IN_USER) + user_enter(); +} + extern void context_tracking_task_switch(struct task_struct *prev, struct task_struct *next); #else static inline bool context_tracking_in_user(void) { return false; } static inline void user_enter(void) { } static inline void user_exit(void) { } +static inline enum ctx_state exception_enter(void) { return 0; } +static inline void exception_exit(enum ctx_state prev_ctx) { } static inline void context_tracking_task_switch(struct task_struct *prev, struct task_struct *next) { } #endif /* !CONFIG_CONTEXT_TRACKING */ diff --git a/include/linux/sched.h b/include/linux/sched.h index fc039ceccbea..9004f6e19eac 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -558,7 +558,7 @@ struct signal_struct { cputime_t utime, stime, cutime, cstime; cputime_t gtime; cputime_t cgtime; -#ifndef CONFIG_VIRT_CPU_ACCOUNTING +#ifndef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE struct cputime prev_cputime; #endif unsigned long nvcsw, nivcsw, cnvcsw, cnivcsw; @@ -1158,7 +1158,7 @@ struct task_struct { cputime_t utime, stime, utimescaled, stimescaled; cputime_t gtime; -#ifndef CONFIG_VIRT_CPU_ACCOUNTING +#ifndef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE struct cputime prev_cputime; #endif #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN |