diff options
Diffstat (limited to 'include/linux/sched.h')
| -rw-r--r-- | include/linux/sched.h | 23 |
1 files changed, 8 insertions, 15 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index df5b24ee80b3..9d4797609aa5 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -27,6 +27,7 @@ #define CLONE_NEWUSER 0x10000000 /* New user namespace */ #define CLONE_NEWPID 0x20000000 /* New pid namespace */ #define CLONE_NEWNET 0x40000000 /* New network namespace */ +#define CLONE_IO 0x80000000 /* Clone io context */ /* * Scheduling policies @@ -975,7 +976,6 @@ struct task_struct { struct hlist_head preempt_notifiers; #endif - unsigned short ioprio; /* * fpu_counter contains the number of consecutive context switches * that the FPU is used. If this is over a threshold, the lazy fpu @@ -1922,23 +1922,16 @@ extern int cond_resched_softirq(void); /* * Does a critical section need to be broken due to another - * task waiting?: + * task waiting?: (technically does not depend on CONFIG_PREEMPT, + * but a general need for low latency) */ -#if defined(CONFIG_PREEMPT) && defined(CONFIG_SMP) -# define need_lockbreak(lock) ((lock)->break_lock) -#else -# define need_lockbreak(lock) 0 -#endif - -/* - * Does a critical section need to be broken due to another - * task waiting or preemption being signalled: - */ -static inline int lock_need_resched(spinlock_t *lock) +static inline int spin_needbreak(spinlock_t *lock) { - if (need_lockbreak(lock) || need_resched()) - return 1; +#ifdef CONFIG_PREEMPT + return spin_is_contended(lock); +#else return 0; +#endif } /* |