diff options
Diffstat (limited to 'include/linux/sched.h')
| -rw-r--r-- | include/linux/sched.h | 78 |
1 files changed, 42 insertions, 36 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index 291a9bd5b97f..a2cd15855bad 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -21,6 +21,7 @@ #include <linux/seccomp.h> #include <linux/nodemask.h> #include <linux/rcupdate.h> +#include <linux/refcount.h> #include <linux/resource.h> #include <linux/latencytop.h> #include <linux/sched/prio.h> @@ -47,6 +48,7 @@ struct pid_namespace; struct pipe_inode_info; struct rcu_node; struct reclaim_state; +struct capture_control; struct robust_list_head; struct sched_attr; struct sched_param; @@ -176,7 +178,7 @@ struct task_group; * TASK_RUNNING store which can collide with __set_current_state(TASK_RUNNING). * * However, with slightly different timing the wakeup TASK_RUNNING store can - * also collide with the TASK_UNINTERRUPTIBLE store. Loosing that store is not + * also collide with the TASK_UNINTERRUPTIBLE store. Losing that store is not * a problem either because that will result in one extra go around the loop * and our @cond test will save the day. * @@ -356,12 +358,6 @@ struct util_est { * For cfs_rq, it is the aggregated load_avg of all runnable and * blocked sched_entities. * - * load_avg may also take frequency scaling into account: - * - * load_avg = runnable% * scale_load_down(load) * freq% - * - * where freq% is the CPU frequency normalized to the highest frequency. - * * [util_avg definition] * * util_avg = running% * SCHED_CAPACITY_SCALE @@ -370,17 +366,14 @@ struct util_est { * a CPU. For cfs_rq, it is the aggregated util_avg of all runnable * and blocked sched_entities. * - * util_avg may also factor frequency scaling and CPU capacity scaling: - * - * util_avg = running% * SCHED_CAPACITY_SCALE * freq% * capacity% - * - * where freq% is the same as above, and capacity% is the CPU capacity - * normalized to the greatest capacity (due to uarch differences, etc). + * load_avg and util_avg don't direcly factor frequency scaling and CPU + * capacity scaling. The scaling is done through the rq_clock_pelt that + * is used for computing those signals (see update_rq_clock_pelt()) * - * N.B., the above ratios (runnable%, running%, freq%, and capacity%) - * themselves are in the range of [0, 1]. To do fixed point arithmetics, - * we therefore scale them to as large a range as necessary. This is for - * example reflected by util_avg's SCHED_CAPACITY_SCALE. + * N.B., the above ratios (runnable% and running%) themselves are in the + * range of [0, 1]. To do fixed point arithmetics, we therefore scale them + * to as large a range as necessary. This is for example reflected by + * util_avg's SCHED_CAPACITY_SCALE. * * [Overflow issue] * @@ -515,7 +508,7 @@ struct sched_dl_entity { /* * Actual scheduling parameters. Initialized with the values above, - * they are continously updated during task execution. Note that + * they are continuously updated during task execution. Note that * the remaining runtime could be < 0 in case we are in overrun. */ s64 runtime; /* Remaining runtime for this instance */ @@ -572,8 +565,10 @@ union rcu_special { struct { u8 blocked; u8 need_qs; + u8 exp_hint; /* Hint for performance. */ + u8 pad; /* No garbage from compiler! */ } b; /* Bits. */ - u16 s; /* Set of bits. */ + u32 s; /* Set of bits. */ }; enum perf_event_task_context { @@ -605,7 +600,7 @@ struct task_struct { randomized_struct_fields_start void *stack; - atomic_t usage; + refcount_t usage; /* Per task flags (PF_*), defined further below: */ unsigned int flags; unsigned int ptrace; @@ -731,18 +726,14 @@ struct task_struct { #ifdef CONFIG_CGROUPS /* disallow userland-initiated cgroup migration */ unsigned no_cgroup_migration:1; + /* task is frozen/stopped (used by the cgroup freezer) */ + unsigned frozen:1; #endif #ifdef CONFIG_BLK_CGROUP /* to be used once the psi infrastructure lands upstream. */ unsigned use_memdelay:1; #endif - /* - * May usercopy functions fault on kernel addresses? - * This is not just a single bit because this can potentially nest. - */ - unsigned int kernel_uaccess_faults_ok; - unsigned long atomic_flags; /* Flags requiring atomic access. */ struct restart_block restart_block; @@ -883,8 +874,10 @@ struct task_struct { struct callback_head *task_works; - struct audit_context *audit_context; +#ifdef CONFIG_AUDIT #ifdef CONFIG_AUDITSYSCALL + struct audit_context *audit_context; +#endif kuid_t loginuid; unsigned int sessionid; #endif @@ -962,6 +955,9 @@ struct task_struct { struct io_context *io_context; +#ifdef CONFIG_COMPACTION + struct capture_control *capture_control; +#endif /* Ptrace state: */ unsigned long ptrace_message; kernel_siginfo_t *last_siginfo; @@ -993,7 +989,7 @@ struct task_struct { /* cg_list protected by css_set_lock and tsk->alloc_lock: */ struct list_head cg_list; #endif -#ifdef CONFIG_INTEL_RDT +#ifdef CONFIG_X86_CPU_RESCTRL u32 closid; u32 rmid; #endif @@ -1063,7 +1059,6 @@ struct task_struct { #ifdef CONFIG_RSEQ struct rseq __user *rseq; - u32 rseq_len; u32 rseq_sig; /* * RmW on rseq_event_mask must be performed atomically @@ -1191,7 +1186,7 @@ struct task_struct { #endif #ifdef CONFIG_THREAD_INFO_IN_TASK /* A live task holds one reference: */ - atomic_t stack_refcount; + refcount_t stack_refcount; #endif #ifdef CONFIG_LIVEPATCH int patch_state; @@ -1404,9 +1399,10 @@ extern struct pid *cad_pid; #define PF_RANDOMIZE 0x00400000 /* Randomize virtual address space */ #define PF_SWAPWRITE 0x00800000 /* Allowed to write to swap */ #define PF_MEMSTALL 0x01000000 /* Stalled due to lack of memory */ +#define PF_UMH 0x02000000 /* I'm an Usermodehelper process */ #define PF_NO_SETAFFINITY 0x04000000 /* Userland is not allowed to meddle with cpus_allowed */ #define PF_MCE_EARLY 0x08000000 /* Early kill for mce process policy */ -#define PF_MUTEX_TESTER 0x20000000 /* Thread belongs to the rt mutex tester */ +#define PF_MEMALLOC_NOCMA 0x10000000 /* All allocation request will have _GFP_MOVABLE cleared */ #define PF_FREEZER_SKIP 0x40000000 /* Freezer should not count it as freezable */ #define PF_SUSPEND_TASK 0x80000000 /* This thread called freeze_processes() and should not be frozen */ @@ -1456,6 +1452,7 @@ static inline bool is_percpu_thread(void) #define PFA_SPEC_SSB_FORCE_DISABLE 4 /* Speculative Store Bypass force disabled*/ #define PFA_SPEC_IB_DISABLE 5 /* Indirect branch speculation restricted */ #define PFA_SPEC_IB_FORCE_DISABLE 6 /* Indirect branch speculation permanently restricted */ +#define PFA_SPEC_SSB_NOEXEC 7 /* Speculative Store Bypass clear on execve() */ #define TASK_PFA_TEST(name, func) \ static inline bool task_##func(struct task_struct *p) \ @@ -1484,6 +1481,10 @@ TASK_PFA_TEST(SPEC_SSB_DISABLE, spec_ssb_disable) TASK_PFA_SET(SPEC_SSB_DISABLE, spec_ssb_disable) TASK_PFA_CLEAR(SPEC_SSB_DISABLE, spec_ssb_disable) +TASK_PFA_TEST(SPEC_SSB_NOEXEC, spec_ssb_noexec) +TASK_PFA_SET(SPEC_SSB_NOEXEC, spec_ssb_noexec) +TASK_PFA_CLEAR(SPEC_SSB_NOEXEC, spec_ssb_noexec) + TASK_PFA_TEST(SPEC_SSB_FORCE_DISABLE, spec_ssb_force_disable) TASK_PFA_SET(SPEC_SSB_FORCE_DISABLE, spec_ssb_force_disable) @@ -1751,9 +1752,9 @@ static __always_inline bool need_resched(void) static inline unsigned int task_cpu(const struct task_struct *p) { #ifdef CONFIG_THREAD_INFO_IN_TASK - return p->cpu; + return READ_ONCE(p->cpu); #else - return task_thread_info(p)->cpu; + return READ_ONCE(task_thread_info(p)->cpu); #endif } @@ -1855,12 +1856,10 @@ static inline void rseq_fork(struct task_struct *t, unsigned long clone_flags) { if (clone_flags & CLONE_THREAD) { t->rseq = NULL; - t->rseq_len = 0; t->rseq_sig = 0; t->rseq_event_mask = 0; } else { t->rseq = current->rseq; - t->rseq_len = current->rseq_len; t->rseq_sig = current->rseq_sig; t->rseq_event_mask = current->rseq_event_mask; } @@ -1869,7 +1868,6 @@ static inline void rseq_fork(struct task_struct *t, unsigned long clone_flags) static inline void rseq_execve(struct task_struct *t) { t->rseq = NULL; - t->rseq_len = 0; t->rseq_sig = 0; t->rseq_event_mask = 0; } @@ -1902,6 +1900,14 @@ static inline void rseq_execve(struct task_struct *t) #endif +void __exit_umh(struct task_struct *tsk); + +static inline void exit_umh(struct task_struct *tsk) +{ + if (unlikely(tsk->flags & PF_UMH)) + __exit_umh(tsk); +} + #ifdef CONFIG_DEBUG_RSEQ void rseq_syscall(struct pt_regs *regs); |