013ff13a30
When tasks move across cpusets, the current affinity settings are lost. Cache the task affinity and restore it during cpuset migration. The restoring happens only when the cached affinity is subset of the current cpuset settings. Change-Id: I6c2ec1d5e3d994e176926d94b9e0cc92418020cc Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
311 lines
7.9 KiB
C
311 lines
7.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX__INIT_TASK_H
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#define _LINUX__INIT_TASK_H
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#include <linux/rcupdate.h>
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#include <linux/irqflags.h>
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#include <linux/utsname.h>
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#include <linux/lockdep.h>
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#include <linux/ftrace.h>
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#include <linux/ipc.h>
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#include <linux/pid_namespace.h>
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#include <linux/user_namespace.h>
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#include <linux/securebits.h>
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#include <linux/seqlock.h>
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#include <linux/rbtree.h>
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#include <linux/sched/autogroup.h>
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#include <net/net_namespace.h>
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#include <linux/sched/rt.h>
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#include <linux/livepatch.h>
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#include <linux/mm_types.h>
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#include <asm/thread_info.h>
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#ifdef CONFIG_SMP
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# define INIT_PUSHABLE_TASKS(tsk) \
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.pushable_tasks = PLIST_NODE_INIT(tsk.pushable_tasks, MAX_PRIO),
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#else
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# define INIT_PUSHABLE_TASKS(tsk)
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#endif
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extern struct files_struct init_files;
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extern struct fs_struct init_fs;
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#ifdef CONFIG_CPUSETS
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#define INIT_CPUSET_SEQ(tsk) \
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.mems_allowed_seq = SEQCNT_ZERO(tsk.mems_allowed_seq),
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#else
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#define INIT_CPUSET_SEQ(tsk)
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#endif
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#ifndef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
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#define INIT_PREV_CPUTIME(x) .prev_cputime = { \
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.lock = __RAW_SPIN_LOCK_UNLOCKED(x.prev_cputime.lock), \
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},
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#else
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#define INIT_PREV_CPUTIME(x)
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#endif
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#ifdef CONFIG_POSIX_TIMERS
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#define INIT_POSIX_TIMERS(s) \
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.posix_timers = LIST_HEAD_INIT(s.posix_timers),
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#define INIT_CPU_TIMERS(s) \
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.cpu_timers = { \
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LIST_HEAD_INIT(s.cpu_timers[0]), \
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LIST_HEAD_INIT(s.cpu_timers[1]), \
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LIST_HEAD_INIT(s.cpu_timers[2]), \
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},
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#define INIT_CPUTIMER(s) \
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.cputimer = { \
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.cputime_atomic = INIT_CPUTIME_ATOMIC, \
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.running = false, \
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.checking_timer = false, \
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},
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#else
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#define INIT_POSIX_TIMERS(s)
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#define INIT_CPU_TIMERS(s)
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#define INIT_CPUTIMER(s)
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#endif
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#define INIT_SIGNALS(sig) { \
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.nr_threads = 1, \
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.thread_head = LIST_HEAD_INIT(init_task.thread_node), \
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.wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\
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.shared_pending = { \
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.list = LIST_HEAD_INIT(sig.shared_pending.list), \
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.signal = {{0}}}, \
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INIT_POSIX_TIMERS(sig) \
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INIT_CPU_TIMERS(sig) \
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.rlim = INIT_RLIMITS, \
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INIT_CPUTIMER(sig) \
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INIT_PREV_CPUTIME(sig) \
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.cred_guard_mutex = \
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__MUTEX_INITIALIZER(sig.cred_guard_mutex), \
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}
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extern struct nsproxy init_nsproxy;
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#define INIT_SIGHAND(sighand) { \
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.count = ATOMIC_INIT(1), \
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.action = { { { .sa_handler = SIG_DFL, } }, }, \
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.siglock = __SPIN_LOCK_UNLOCKED(sighand.siglock), \
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.signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(sighand.signalfd_wqh), \
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}
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extern struct group_info init_groups;
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#define INIT_STRUCT_PID { \
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.count = ATOMIC_INIT(1), \
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.tasks = { \
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{ .first = NULL }, \
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{ .first = NULL }, \
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{ .first = NULL }, \
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}, \
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.level = 0, \
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.numbers = { { \
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.nr = 0, \
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.ns = &init_pid_ns, \
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.pid_chain = { .next = NULL, .pprev = NULL }, \
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}, } \
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}
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#define INIT_PID_LINK(type) \
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{ \
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.node = { \
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.next = NULL, \
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.pprev = NULL, \
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}, \
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.pid = &init_struct_pid, \
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}
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#ifdef CONFIG_AUDITSYSCALL
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#define INIT_IDS \
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.loginuid = INVALID_UID, \
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.sessionid = (unsigned int)-1,
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#else
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#define INIT_IDS
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#endif
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#ifdef CONFIG_PREEMPT_RCU
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#define INIT_TASK_RCU_PREEMPT(tsk) \
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.rcu_read_lock_nesting = 0, \
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.rcu_read_unlock_special.s = 0, \
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.rcu_node_entry = LIST_HEAD_INIT(tsk.rcu_node_entry), \
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.rcu_blocked_node = NULL,
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#else
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#define INIT_TASK_RCU_PREEMPT(tsk)
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#endif
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#ifdef CONFIG_TASKS_RCU
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#define INIT_TASK_RCU_TASKS(tsk) \
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.rcu_tasks_holdout = false, \
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.rcu_tasks_holdout_list = \
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LIST_HEAD_INIT(tsk.rcu_tasks_holdout_list), \
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.rcu_tasks_idle_cpu = -1,
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#else
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#define INIT_TASK_RCU_TASKS(tsk)
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#endif
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extern struct cred init_cred;
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#ifdef CONFIG_CGROUP_SCHED
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# define INIT_CGROUP_SCHED(tsk) \
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.sched_task_group = &root_task_group,
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#else
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# define INIT_CGROUP_SCHED(tsk)
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#endif
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#ifdef CONFIG_PERF_EVENTS
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# define INIT_PERF_EVENTS(tsk) \
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.perf_event_mutex = \
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__MUTEX_INITIALIZER(tsk.perf_event_mutex), \
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.perf_event_list = LIST_HEAD_INIT(tsk.perf_event_list),
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#else
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# define INIT_PERF_EVENTS(tsk)
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#endif
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#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
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# define INIT_VTIME(tsk) \
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.vtime.seqcount = SEQCNT_ZERO(tsk.vtime.seqcount), \
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.vtime.starttime = 0, \
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.vtime.state = VTIME_SYS,
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#else
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# define INIT_VTIME(tsk)
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#endif
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#define INIT_TASK_COMM "swapper"
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#ifdef CONFIG_RT_MUTEXES
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# define INIT_RT_MUTEXES(tsk) \
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.pi_waiters = RB_ROOT_CACHED, \
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.pi_top_task = NULL,
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#else
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# define INIT_RT_MUTEXES(tsk)
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#endif
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#ifdef CONFIG_NUMA_BALANCING
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# define INIT_NUMA_BALANCING(tsk) \
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.numa_preferred_nid = -1, \
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.numa_group = NULL, \
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.numa_faults = NULL,
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#else
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# define INIT_NUMA_BALANCING(tsk)
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#endif
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#ifdef CONFIG_KASAN
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# define INIT_KASAN(tsk) \
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.kasan_depth = 1,
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#else
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# define INIT_KASAN(tsk)
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#endif
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#ifdef CONFIG_LIVEPATCH
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# define INIT_LIVEPATCH(tsk) \
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.patch_state = KLP_UNDEFINED,
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#else
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# define INIT_LIVEPATCH(tsk)
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#endif
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#ifdef CONFIG_THREAD_INFO_IN_TASK
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# define INIT_TASK_TI(tsk) \
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.thread_info = INIT_THREAD_INFO(tsk), \
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.stack_refcount = ATOMIC_INIT(1),
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#else
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# define INIT_TASK_TI(tsk)
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#endif
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#ifdef CONFIG_SECURITY
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#define INIT_TASK_SECURITY .security = NULL,
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#else
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#define INIT_TASK_SECURITY
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#endif
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/*
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* INIT_TASK is used to set up the first task table, touch at
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* your own risk!. Base=0, limit=0x1fffff (=2MB)
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*/
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#define INIT_TASK(tsk) \
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{ \
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INIT_TASK_TI(tsk) \
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.state = 0, \
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.stack = init_stack, \
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.usage = ATOMIC_INIT(2), \
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.flags = PF_KTHREAD, \
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.prio = MAX_PRIO-20, \
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.static_prio = MAX_PRIO-20, \
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.normal_prio = MAX_PRIO-20, \
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.policy = SCHED_NORMAL, \
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.cpus_allowed = CPU_MASK_ALL, \
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.nr_cpus_allowed= NR_CPUS, \
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.cpus_requested = CPU_MASK_ALL, \
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.mm = NULL, \
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.active_mm = &init_mm, \
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.restart_block = { \
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.fn = do_no_restart_syscall, \
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}, \
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.se = { \
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.group_node = LIST_HEAD_INIT(tsk.se.group_node), \
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}, \
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.rt = { \
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.run_list = LIST_HEAD_INIT(tsk.rt.run_list), \
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.time_slice = RR_TIMESLICE, \
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}, \
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.tasks = LIST_HEAD_INIT(tsk.tasks), \
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INIT_PUSHABLE_TASKS(tsk) \
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INIT_CGROUP_SCHED(tsk) \
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.ptraced = LIST_HEAD_INIT(tsk.ptraced), \
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.ptrace_entry = LIST_HEAD_INIT(tsk.ptrace_entry), \
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.real_parent = &tsk, \
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.parent = &tsk, \
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.children = LIST_HEAD_INIT(tsk.children), \
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.sibling = LIST_HEAD_INIT(tsk.sibling), \
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.group_leader = &tsk, \
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RCU_POINTER_INITIALIZER(real_cred, &init_cred), \
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RCU_POINTER_INITIALIZER(cred, &init_cred), \
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.comm = INIT_TASK_COMM, \
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.thread = INIT_THREAD, \
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.fs = &init_fs, \
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.files = &init_files, \
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.signal = &init_signals, \
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.sighand = &init_sighand, \
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.nsproxy = &init_nsproxy, \
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.pending = { \
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.list = LIST_HEAD_INIT(tsk.pending.list), \
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.signal = {{0}}}, \
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.blocked = {{0}}, \
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.alloc_lock = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock), \
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.journal_info = NULL, \
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INIT_CPU_TIMERS(tsk) \
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.pi_lock = __RAW_SPIN_LOCK_UNLOCKED(tsk.pi_lock), \
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.timer_slack_ns = 50000, /* 50 usec default slack */ \
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.pids = { \
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[PIDTYPE_PID] = INIT_PID_LINK(PIDTYPE_PID), \
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[PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID), \
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[PIDTYPE_SID] = INIT_PID_LINK(PIDTYPE_SID), \
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}, \
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.thread_group = LIST_HEAD_INIT(tsk.thread_group), \
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.thread_node = LIST_HEAD_INIT(init_signals.thread_head), \
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INIT_IDS \
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INIT_PERF_EVENTS(tsk) \
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INIT_TRACE_IRQFLAGS \
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INIT_LOCKDEP \
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INIT_FTRACE_GRAPH \
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INIT_TRACE_RECURSION \
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INIT_TASK_RCU_PREEMPT(tsk) \
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INIT_TASK_RCU_TASKS(tsk) \
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INIT_CPUSET_SEQ(tsk) \
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INIT_RT_MUTEXES(tsk) \
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INIT_PREV_CPUTIME(tsk) \
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INIT_VTIME(tsk) \
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INIT_NUMA_BALANCING(tsk) \
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INIT_KASAN(tsk) \
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INIT_LIVEPATCH(tsk) \
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INIT_TASK_SECURITY \
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}
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/* Attach to the init_task data structure for proper alignment */
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#define __init_task_data __attribute__((__section__(".data..init_task")))
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#endif
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