diff options
author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-10-20 00:10:27 -0300 |
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committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-10-20 00:10:27 -0300 |
commit | d0b2f91bede3bd5e3d24dd6803e56eee959c1797 (patch) | |
tree | 7fee4ab0509879c373c4f2cbd5b8a5be5b4041ee /include/linux/sched.h | |
parent | e914f8eb445e8f74b00303c19c2ffceaedd16a05 (diff) |
Linux-libre 4.8.2-gnupck-4.8.2-gnu
Diffstat (limited to 'include/linux/sched.h')
-rw-r--r-- | include/linux/sched.h | 121 |
1 files changed, 96 insertions, 25 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index 0c40d315f..646bf0947 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -220,9 +220,10 @@ extern void proc_sched_set_task(struct task_struct *p); #define TASK_WAKING 256 #define TASK_PARKED 512 #define TASK_NOLOAD 1024 -#define TASK_STATE_MAX 2048 +#define TASK_NEW 2048 +#define TASK_STATE_MAX 4096 -#define TASK_STATE_TO_CHAR_STR "RSDTtXZxKWPN" +#define TASK_STATE_TO_CHAR_STR "RSDTtXZxKWPNn" extern char ___assert_task_state[1 - 2*!!( sizeof(TASK_STATE_TO_CHAR_STR)-1 != ilog2(TASK_STATE_MAX)+1)]; @@ -521,6 +522,7 @@ static inline int get_dumpable(struct mm_struct *mm) #define MMF_HAS_UPROBES 19 /* has uprobes */ #define MMF_RECALC_UPROBES 20 /* MMF_HAS_UPROBES can be wrong */ #define MMF_OOM_REAPED 21 /* mm has been already reaped */ +#define MMF_OOM_NOT_REAPABLE 22 /* mm couldn't be reaped */ #define MMF_INIT_MASK (MMF_DUMPABLE_MASK | MMF_DUMP_FILTER_MASK) @@ -1560,6 +1562,9 @@ struct task_struct { /* unserialized, strictly 'current' */ unsigned in_execve:1; /* bit to tell LSMs we're in execve */ unsigned in_iowait:1; +#if !defined(TIF_RESTORE_SIGMASK) + unsigned restore_sigmask:1; +#endif #ifdef CONFIG_MEMCG unsigned memcg_may_oom:1; #ifndef CONFIG_SLOB @@ -1953,10 +1958,6 @@ extern int arch_task_struct_size __read_mostly; #endif #ifdef CONFIG_SCHED_BFS -bool grunqueue_is_locked(void); -void grq_unlock_wait(void); -void cpu_scaling(int cpu); -void cpu_nonscaling(int cpu); #define tsk_seruntime(t) ((t)->sched_time) #define tsk_rttimeout(t) ((t)->rt_timeout) @@ -1964,11 +1965,6 @@ static inline void tsk_cpus_current(struct task_struct *p) { } -static inline int runqueue_is_locked(int cpu) -{ - return grunqueue_is_locked(); -} - void print_scheduler_version(void); static inline bool iso_task(struct task_struct *p) @@ -1976,14 +1972,6 @@ static inline bool iso_task(struct task_struct *p) return (p->policy == SCHED_ISO); } #else /* CFS */ -extern int runqueue_is_locked(int cpu); -static inline void cpu_scaling(int cpu) -{ -} - -static inline void cpu_nonscaling(int cpu) -{ -} #define tsk_seruntime(t) ((t)->se.sum_exec_runtime) #define tsk_rttimeout(t) ((t)->rt.timeout) @@ -2001,12 +1989,6 @@ static inline bool iso_task(struct task_struct *p) { return false; } - -/* Anyone feel like implementing this? */ -static inline bool above_background_load(void) -{ - return false; -} #endif /* CONFIG_SCHED_BFS */ /* Future-safe accessor for struct task_struct's cpus_allowed. */ @@ -2023,6 +2005,32 @@ static inline int tsk_nr_cpus_allowed(struct task_struct *p) #define TNF_FAULT_LOCAL 0x08 #define TNF_MIGRATE_FAIL 0x10 +static inline bool in_vfork(struct task_struct *tsk) +{ + bool ret; + + /* + * need RCU to access ->real_parent if CLONE_VM was used along with + * CLONE_PARENT. + * + * We check real_parent->mm == tsk->mm because CLONE_VFORK does not + * imply CLONE_VM + * + * CLONE_VFORK can be used with CLONE_PARENT/CLONE_THREAD and thus + * ->real_parent is not necessarily the task doing vfork(), so in + * theory we can't rely on task_lock() if we want to dereference it. + * + * And in this case we can't trust the real_parent->mm == tsk->mm + * check, it can be false negative. But we do not care, if init or + * another oom-unkillable task does this it should blame itself. + */ + rcu_read_lock(); + ret = tsk->vfork_done && tsk->real_parent->mm == tsk->mm; + rcu_read_unlock(); + + return ret; +} + #ifdef CONFIG_NUMA_BALANCING extern void task_numa_fault(int last_node, int node, int pages, int flags); extern pid_t task_numa_group_id(struct task_struct *p); @@ -2214,6 +2222,9 @@ static inline void put_task_struct(struct task_struct *t) __put_task_struct(t); } +struct task_struct *task_rcu_dereference(struct task_struct **ptask); +struct task_struct *try_get_task_struct(struct task_struct **ptask); + #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN extern void task_cputime(struct task_struct *t, cputime_t *utime, cputime_t *stime); @@ -2724,6 +2735,66 @@ extern void sigqueue_free(struct sigqueue *); extern int send_sigqueue(struct sigqueue *, struct task_struct *, int group); extern int do_sigaction(int, struct k_sigaction *, struct k_sigaction *); +#ifdef TIF_RESTORE_SIGMASK +/* + * Legacy restore_sigmask accessors. These are inefficient on + * SMP architectures because they require atomic operations. + */ + +/** + * set_restore_sigmask() - make sure saved_sigmask processing gets done + * + * This sets TIF_RESTORE_SIGMASK and ensures that the arch signal code + * will run before returning to user mode, to process the flag. For + * all callers, TIF_SIGPENDING is already set or it's no harm to set + * it. TIF_RESTORE_SIGMASK need not be in the set of bits that the + * arch code will notice on return to user mode, in case those bits + * are scarce. We set TIF_SIGPENDING here to ensure that the arch + * signal code always gets run when TIF_RESTORE_SIGMASK is set. + */ +static inline void set_restore_sigmask(void) +{ + set_thread_flag(TIF_RESTORE_SIGMASK); + WARN_ON(!test_thread_flag(TIF_SIGPENDING)); +} +static inline void clear_restore_sigmask(void) +{ + clear_thread_flag(TIF_RESTORE_SIGMASK); +} +static inline bool test_restore_sigmask(void) +{ + return test_thread_flag(TIF_RESTORE_SIGMASK); +} +static inline bool test_and_clear_restore_sigmask(void) +{ + return test_and_clear_thread_flag(TIF_RESTORE_SIGMASK); +} + +#else /* TIF_RESTORE_SIGMASK */ + +/* Higher-quality implementation, used if TIF_RESTORE_SIGMASK doesn't exist. */ +static inline void set_restore_sigmask(void) +{ + current->restore_sigmask = true; + WARN_ON(!test_thread_flag(TIF_SIGPENDING)); +} +static inline void clear_restore_sigmask(void) +{ + current->restore_sigmask = false; +} +static inline bool test_restore_sigmask(void) +{ + return current->restore_sigmask; +} +static inline bool test_and_clear_restore_sigmask(void) +{ + if (!current->restore_sigmask) + return false; + current->restore_sigmask = false; + return true; +} +#endif + static inline void restore_saved_sigmask(void) { if (test_and_clear_restore_sigmask()) |