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Searched refs:need_resched (Results 1 – 25 of 94) sorted by relevance

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/linux/Documentation/translations/zh_CN/scheduler/
H A Dsched-arch.rst37 2. need_resched/TIF_NEED_RESCHED 只会被设置，并且在运行任务调用 schedule()
38 之前永远不会被清除。空闲线程只需要查询need_resched，并且永远不会设置或清除它。
40 3. 当cpu_idle发现（need_resched() == 'true'），它应该调用schedule()。否则
43 4. 在检查need_resched时，唯一需要禁用中断的情况是，我们要让处理器休眠到下一个中
44 断（这并不对need_resched提供任何保护，它可以防止丢失一个中断）:
49 if (!need_resched()) {
55 5. 当need_resched变为高电平时，TIF_POLLING_NRFLAG可以由不需要中断来唤醒它们
56 的空闲程序设置。换句话说，它们必须定期轮询need_resched，尽管做一些后台工作或
60 么需要清除它，然后发出一个内存屏障（接着测试need_resched，禁用中断，如3中解释）。
/linux/Documentation/scheduler/
H A Dsched-arch.rst29 2. need_resched/TIF_NEED_RESCHED is only ever set, and will never
31 threads need only ever query need_resched, and may never set or
34 3. When cpu_idle finds (need_resched() == 'true'), it should call
38 need_resched is if we are about to sleep the processor until
40 need_resched, it prevents losing an interrupt):
45 if (!need_resched()) {
52 need an interrupt to wake them up when need_resched goes high.
53 In other words, they must be periodically polling need_resched,
59 barrier issued (followed by a test of need_resched with
/linux/arch/arm64/include/asm/
H A Dpreempt.h31 current_thread_info()->preempt.need_resched = 0; in set_preempt_need_resched()
36 current_thread_info()->preempt.need_resched = 1; in clear_preempt_need_resched()
41 return !current_thread_info()->preempt.need_resched; in test_preempt_need_resched()
/linux/arch/mips/kernel/
H A Dentry.S48 # interrupt setting need_resched
84 local_irq_disable # make sure need_resched and
128 local_irq_disable # make sure need_resched and
150 local_irq_disable # make sure need_resched doesn't
H A Didle.c47 if (!need_resched()) in r4k_wait_irqoff()
61 if (!need_resched()) in rm7k_wait_irqoff()
/linux/Documentation/trace/rv/
H A Dmonitor_sched.rst181 ``need_resched``. Only kernel preemption is considered, since preemption
195 In theory, a preemption can only occur after the ``need_resched`` flag is set. In
199 need_resched
203 !need_resched
208 path, it schedules, which clears the ``need_resched`` flag.
253 Due to how the ``need_resched`` flag on the preemption count works on arm64,
283 if the ``need_resched`` flag is set. By definition, a task cannot yield while
348 operations like ``wakeup`` and ``need_resched`` occur with interrupts and
351 ``need_resched`` can be set by some RCU internals functions, in which case it
396 might invoke a softirq to set ``need_resched`` and wake up a task. This is
/linux/arch/x86/include/asm/
H A Dmwait.h111 if (need_resched()) in mwait_idle_with_hints()
122 if (need_resched()) in mwait_idle_with_hints()
/linux/drivers/cpuidle/
H A Dcoupled.c477 if (need_resched()) { in cpuidle_enter_state_coupled()
519 if (need_resched()) { in cpuidle_enter_state_coupled()
535 if (need_resched()) { in cpuidle_enter_state_coupled()
H A Dcpuidle-powernv.c82 while (!need_resched()) { in snooze_loop()
/linux/kernel/trace/
H A Dtrace_output.c456 char need_resched; in trace_print_lat_fmt() local
477 need_resched = 'B'; in trace_print_lat_fmt()
480 need_resched = 'N'; in trace_print_lat_fmt()
483 need_resched = 'L'; in trace_print_lat_fmt()
486 need_resched = 'b'; in trace_print_lat_fmt()
489 need_resched = 'n'; in trace_print_lat_fmt()
492 need_resched = 'p'; in trace_print_lat_fmt()
495 need_resched = 'l'; in trace_print_lat_fmt()
498 need_resched = '.'; in trace_print_lat_fmt()
511 irqs_off, need_resched, hardsoft_irq); in trace_print_lat_fmt()
/linux/fs/btrfs/
H A Dextent-io-tree.c716 if (need_resched()) in btrfs_clear_extent_bit_changeset()
754 if (state && !need_resched()) in btrfs_clear_extent_bit_changeset()
1133 if (state && state->start == start && !need_resched()) in set_extent_bit()
1189 if (state && state->start == start && !need_resched()) in set_extent_bit()
1234 if (need_resched()) in set_extent_bit()
1392 if (state && state->start == start && !need_resched()) in btrfs_convert_extent_bit()
1431 if (state && state->start == start && !need_resched()) in btrfs_convert_extent_bit()
1477 if (need_resched()) in btrfs_convert_extent_bit()
/linux/kernel/sched/
H A Didle.c183 if (need_resched()) { in cpuidle_idle_call()
280 while (!need_resched()) { in do_idle()
/linux/drivers/net/ethernet/sfc/
H A Def100_rep.c399 bool need_resched; in efx_ef100_rep_poll() local
424 need_resched = efv->write_index != read_index; in efx_ef100_rep_poll()
426 if (need_resched) in efx_ef100_rep_poll()
/linux/fs/
H A Ddrop_caches.c32 (mapping_empty(inode->i_mapping) && !need_resched())) { in drop_pagecache_sb()
/linux/drivers/acpi/
H A Dacpi_pad.c168 while (!need_resched()) { in power_saving_thread()
213 if (unlikely(need_resched())) in power_saving_thread()
/linux/Documentation/translations/zh_CN/locking/
H A Dmutex-design.rst53 任务（need_resched，需要重新调度）准备运行时，当前任务试图自旋来获得
/linux/drivers/gpib/agilent_82350b/
H A Dagilent_82350b.c539 if (need_resched()) in init_82350a_hardware()
550 if (need_resched()) in init_82350a_hardware()
573 if (need_resched()) in test_sram()
584 if (need_resched()) in test_sram()
/linux/drivers/net/wireguard/
H A Dsend.c282 if (need_resched()) in wg_packet_tx_worker()
306 if (need_resched()) in wg_packet_encrypt_worker()
/linux/mm/
H A Ddmapool_test.c85 if (need_resched()) in dmapool_test_block()
/linux/drivers/char/
H A Dmem.c73 if (need_resched()) in should_stop_iteration()
471 if (!need_resched()) in read_iter_zero()
/linux/arch/arm/mach-omap2/
H A Dcpuidle34xx.c114 if (omap_irq_pending() || need_resched()) in omap3_enter_idle()
/linux/arch/um/kernel/
H A Dprocess.c233 return need_resched(); in uml_need_resched()
/linux/kernel/locking/
H A Drwsem.c710 if (need_resched()) { in rwsem_can_spin_on_owner()
780 if (need_resched() || !owner_on_cpu(owner)) { in rwsem_spin_on_owner()
912 if (need_resched()) in rwsem_optimistic_spin()
/linux/kernel/
H A Dsoftirq.c641 if (time_before(jiffies, end) && !need_resched() && in handle_softirqs()
688 if ((sched_core_idle_cpu(cpu) && !need_resched()) || tick_nohz_full_cpu(cpu)) { in tick_irq_exit()
/linux/security/keys/
H A Dgc.c264 if (spin_is_contended(&key_serial_lock) || need_resched()) in key_garbage_collector()

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