Changes in init_task.c

0fc8f6200d2313278fbf4539bbab74677c685531 - Merge drm/drm-fixes into drm-misc-fixes

Mon, 27 Apr 2026 08:26:49 +0000

Merge drm/drm-fixes into drm-misc-fixesGetting fixes and updates from v7.1-rc1.Signed-off-by: Thomas Zimmermann List of files: /linux/init/init_task.c

f4b369c6fe0ceaba2da2daff8c9eb415f85926dd - Merge branch 'next' into for-linus

Mon, 20 Apr 2026 01:28:57 +0000

Merge branch 'next' into for-linusPrepare input updates for 7.1 merge window. List of files: /linux/init/init_task.c

1c3b68f0d55b5932eb38eda602a61aec6d6f5e5e - Merge tag 'sched-core-2026-04-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Tue, 14 Apr 2026 20:33:36 +0000

Merge tag 'sched-core-2026-04-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipPull scheduler updates from Ingo Molnar: "Fair scheduling updates: - Skip SCHED_IDLE rq for SCHED_IDLE tasks (Christian Loehle) - Remove superfluous rcu_read_lock() in the wakeup path (K Prateek Nayak) - Simplify the entry condition for update_idle_cpu_scan() (K Prateek Nayak) - Simplify SIS_UTIL handling in select_idle_cpu() (K Prateek Nayak) - Avoid overflow in enqueue_entity() (K Prateek Nayak) - Update overutilized detection (Vincent Guittot) - Prevent negative lag increase during delayed dequeue (Vincent Guittot) - Clear buddies for preempt_short (Vincent Guittot) - Implement more complex proportional newidle balance (Peter Zijlstra) - Increase weight bits for avg_vruntime (Peter Zijlstra) - Use full weight to __calc_delta() (Peter Zijlstra) RT and DL scheduling updates: - Fix incorrect schedstats for rt and dl thread (Dengjun Su) - Skip group schedulable check with rt_group_sched=0 (Michal Koutný) - Move group schedulability check to sched_rt_global_validate() (Michal Koutný) - Add reporting of runtime left & abs deadline to sched_getattr() for DEADLINE tasks (Tommaso Cucinotta) Scheduling topology updates by K Prateek Nayak: - Compute sd_weight considering cpuset partitions - Extract "imb_numa_nr" calculation into a separate helper - Allocate per-CPU sched_domain_shared in s_data - Switch to assigning "sd->shared" from s_data - Remove sched_domain_shared allocation with sd_data Energy-aware scheduling updates: - Filter false overloaded_group case for EAS (Vincent Guittot) - PM: EM: Switch to rcu_dereference_all() in wakeup path (Dietmar Eggemann) Infrastructure updates: - Replace use of system_unbound_wq with system_dfl_wq (Marco Crivellari) Proxy scheduling updates by John Stultz: - Make class_schedulers avoid pushing current, and get rid of proxy_tag_curr() - Minimise repeated sched_proxy_exec() checking - Fix potentially missing balancing with Proxy Exec - Fix and improve task::blocked_on et al handling - Add assert_balance_callbacks_empty() helper - Add logic to zap balancing callbacks if we pick again - Move attach_one_task() and attach_task() helpers to sched.h - Handle blocked-waiter migration (and return migration) - Add K Prateek Nayak to scheduler reviewers for proxy execution Misc cleanups and fixes by John Stultz, Joseph Salisbury, Peter Zijlstra, K Prateek Nayak, Michal Koutný, Randy Dunlap, Shrikanth Hegde, Vincent Guittot, Zhan Xusheng, Xie Yuanbin and Vincent Guittot"* tag 'sched-core-2026-04-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (46 commits) sched/eevdf: Clear buddies for preempt_short sched/rt: Cleanup global RT bandwidth functions sched/rt: Move group schedulability check to sched_rt_global_validate() sched/rt: Skip group schedulable check with rt_group_sched=0 sched/fair: Avoid overflow in enqueue_entity() sched: Use u64 for bandwidth ratio calculations sched/fair: Prevent negative lag increase during delayed dequeue sched/fair: Use sched_energy_enabled() sched: Handle blocked-waiter migration (and return migration) sched: Move attach_one_task and attach_task helpers to sched.h sched: Add logic to zap balance callbacks if we pick again sched: Add assert_balance_callbacks_empty helper sched/locking: Add special p->blocked_on==PROXY_WAKING value for proxy return-migration sched: Fix modifying donor->blocked on without proper locking locking: Add task::blocked_lock to serialize blocked_on state sched: Fix potentially missing balancing with Proxy Exec sched: Minimise repeated sched_proxy_exec() checking sched: Make class_schedulers avoid pushing current, and get rid of proxy_tag_curr() MAINTAINERS: Add K Prateek Nayak to scheduler reviewers sched/core: Get this cpu once in ttwu_queue_cond() ... List of files: /linux/init/init_task.c

fa4a1ff8ab235a308d8c983827657a69649185fd - locking: Add task::blocked_lock to serialize blocked_on state

Tue, 24 Mar 2026 19:13:19 +0000

locking: Add task::blocked_lock to serialize blocked_on stateSo far, we have been able to utilize the mutex::wait_lockfor serializing the blocked_on state, but when we move toproxying across runqueues, we will need to add more stateand a way to serialize changes to this state in contextswhere we don't hold the mutex::wait_lock.So introduce the task::blocked_lock, which nests under themutex::wait_lock in the locking order, and rework the lockingto use it.Signed-off-by: John Stultz Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: K Prateek Nayak Link: https://patch.msgid.link/20260324191337.1841376-5-jstultz@google.com List of files: /linux/init/init_task.c

0421ccdfad0d92713a812a5aeb7d07b0ea7213c8 - Merge tag 'v7.0-rc3' into next

Thu, 12 Mar 2026 17:44:42 +0000

Merge tag 'v7.0-rc3' into nextSync up with the mainline to brig up the latest changes, specificallychanges to ALPS driver. List of files: /linux/init/init_task.c

42d3b66d4cdbacfc9d120d2301b8de89cc29a914 - Merge drm/drm-next into drm-xe-next

Thu, 12 Mar 2026 14:17:56 +0000

Merge drm/drm-next into drm-xe-nextBackmerging to bring in 7.00-rc3. Important ahead GPU SVM merging THPsupport.Signed-off-by: Matthew Brost List of files: /linux/init/init_task.c

f09812b85fa6f41058bcc46e70ac406bf9b0493a - Merge drm/drm-next into drm-intel-next

Wed, 25 Feb 2026 11:23:04 +0000

Merge drm/drm-next into drm-intel-nextSync with v7.0-rc1 which contains a few treewide changes affecting i915.Signed-off-by: Jani Nikula List of files: /linux/init/init_task.c

8b85987d3cf50178f67618122d9f3bb202f62f42 - Merge drm/drm-next into drm-misc-next

Mon, 23 Feb 2026 10:48:20 +0000

Merge drm/drm-next into drm-misc-nextLet's merge 7.0-rc1 to start the new drm-misc-next windowSigned-off-by: Maxime Ripard List of files: /linux/init/init_task.c

c17ee635fd3a482b2ad2bf5e269755c2eae5f25e - Merge drm/drm-fixes into drm-misc-fixes

Mon, 23 Feb 2026 09:09:45 +0000

Merge drm/drm-fixes into drm-misc-fixes7.0-rc1 was just released, let's merge it to kick the new release cycle.Signed-off-by: Maxime Ripard List of files: /linux/init/init_task.c

36ae1c45b2cede43ab2fc679b450060bbf119f1b - Merge tag 'sched-core-2026-02-09' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Tue, 10 Feb 2026 20:50:10 +0000

Merge tag 'sched-core-2026-02-09' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipPull scheduler updates from Ingo Molnar: "Scheduler Kconfig space updates: - Further consolidate configurable preemption modes (Peter Zijlstra) Reduce the number of architectures that are allowed to offer PREEMPT_NONE and PREEMPT_VOLUNTARY, reducing the number of preemption models from four to just two: 'full' and 'lazy' on up-to-date architectures (arm64, loongarch, powerpc, riscv, s390, x86). None and voluntary are only available as legacy features on platforms that don't implement lazy preemption yet, or which don't even support preemption. The goal is to eventually remove cond_resched() and voluntary preemption altogether. RSEQ based 'scheduler time slice extension' support (Thomas Gleixner and Peter Zijlstra): This allows a thread to request a time slice extension when it enters a critical section to avoid contention on a resource when the thread is scheduled out inside of the critical section. - Add fields and constants for time slice extension - Provide static branch for time slice extensions - Add statistics for time slice extensions - Add prctl() to enable time slice extensions - Implement sys_rseq_slice_yield() - Implement syscall entry work for time slice extensions - Implement time slice extension enforcement timer - Reset slice extension when scheduled - Implement rseq_grant_slice_extension() - entry: Hook up rseq time slice extension - selftests: Implement time slice extension test - Allow registering RSEQ with slice extension - Move slice_ext_nsec to debugfs - Lower default slice extension - selftests/rseq: Add rseq slice histogram script Scheduler performance/scalability improvements: - Update rq->avg_idle when a task is moved to an idle CPU, which improves the scalability of various workloads (Shubhang Kaushik) - Reorder fields in 'struct rq' for better caching (Blake Jones) - Fair scheduler SMP NOHZ balancing code speedups (Shrikanth Hegde): - Move checking for nohz cpus after time check - Change likelyhood of nohz.nr_cpus - Remove nohz.nr_cpus and use weight of cpumask instead - Avoid false sharing for sched_clock_irqtime (Wangyang Guo) - Cleanups (Yury Norov): - Drop useless cpumask_empty() in find_energy_efficient_cpu() - Simplify task_numa_find_cpu() - Use cpumask_weight_and() in sched_balance_find_dst_group() DL scheduler updates: - Add a deadline server for sched_ext tasks (by Andrea Righi and Joel Fernandes, with fixes by Peter Zijlstra) RT scheduler updates: - Skip currently executing CPU in rto_next_cpu() (Chen Jinghuang) Entry code updates and performance improvements (Jinjie Ruan) This is part of the scheduler tree in this cycle due to inter- dependencies with the RSEQ based time slice extension work: - Remove unused syscall argument from syscall_trace_enter() - Rework syscall_exit_to_user_mode_work() for architecture reuse - Add arch_ptrace_report_syscall_entry/exit() - Inline syscall_exit_work() and syscall_trace_enter() Scheduler core updates (Peter Zijlstra): - Rework sched_class::wakeup_preempt() and rq_modified_*() - Avoid rq->lock bouncing in sched_balance_newidle() - Rename rcu_dereference_check_sched_domain() => rcu_dereference_sched_domain() - : Add the __signed_scalar_typeof() helper Fair scheduler updates/refactoring (Peter Zijlstra and Ingo Molnar): - Fold the sched_avg update - Change rcu_dereference_check_sched_domain() to rcu-sched - Switch to rcu_dereference_all() - Remove superfluous rcu_read_lock() - Limit hrtick work - Join two #ifdef CONFIG_FAIR_GROUP_SCHED blocks - Clean up comments in 'struct cfs_rq' - Separate se->vlag from se->vprot - Rename cfs_rq::avg_load to cfs_rq::sum_weight - Rename cfs_rq::avg_vruntime to ::sum_w_vruntime & helper functions - Introduce and use the vruntime_cmp() and vruntime_op() wrappers for wrapped-signed aritmetics - Sort out 'blocked_load*' namespace noise Scheduler debugging code updates: - Export hidden tracepoints to modules (Gabriele Monaco) - Convert copy_from_user() + kstrtouint() to kstrtouint_from_user() (Fushuai Wang) - Add assertions to QUEUE_CLASS (Peter Zijlstra) - hrtimer: Fix tracing oddity (Thomas Gleixner) Misc fixes and cleanups: - Re-evaluate scheduling when migrating queued tasks out of throttled cgroups (Zicheng Qu) - Remove task_struct->faults_disabled_mapping (Christoph Hellwig) - Fix math notation errors in avg_vruntime comment (Zhan Xusheng) - sched/cpufreq: Use %pe format for PTR_ERR() printing (zenghongling)"* tag 'sched-core-2026-02-09' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (64 commits) sched: Re-evaluate scheduling when migrating queued tasks out of throttled cgroups sched/cpufreq: Use %pe format for PTR_ERR() printing sched/rt: Skip currently executing CPU in rto_next_cpu() sched/clock: Avoid false sharing for sched_clock_irqtime selftests/sched_ext: Add test for DL server total_bw consistency selftests/sched_ext: Add test for sched_ext dl_server sched/debug: Fix dl_server (re)start conditions sched/debug: Add support to change sched_ext server params sched_ext: Add a DL server for sched_ext tasks sched/debug: Stop and start server based on if it was active sched/debug: Fix updating of ppos on server write ops sched/deadline: Clear the defer params entry: Inline syscall_exit_work() and syscall_trace_enter() entry: Add arch_ptrace_report_syscall_entry/exit() entry: Rework syscall_exit_to_user_mode_work() for architecture reuse entry: Remove unused syscall argument from syscall_trace_enter() sched: remove task_struct->faults_disabled_mapping sched: Update rq->avg_idle when a task is moved to an idle CPU selftests/rseq: Add rseq slice histogram script hrtimer: Fix trace oddity ... List of files: /linux/init/init_task.c

ef852baaf6a73551cfaa0d082477b50d842b79b8 - Merge tag 'rcu.release.v7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/rcu/linux

Mon, 09 Feb 2026 17:46:26 +0000

Merge tag 'rcu.release.v7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/rcu/linuxPull RCU updates from Boqun Feng: - RCU Tasks Trace: Re-implement RCU tasks trace in term of SRCU-fast, not only more than 500 lines of code are saved because of the reimplementation, a new set of API, rcu_read_{,un}lock_tasks_trace(), becomes possible as well. Compared to the previous rcu_read_{,un}lock_trace(), the new API avoid the task_struct accesses thanks to the SRCU-fast semantics. As a result, the old rcu_read{,un}lock_trace() API is now deprecated. - RCU Torture Test: - Multiple improvements on kvm-series.sh (parallel run and progress showing metrics) - Add context checks to rcu_torture_timer() - Make config2csv.sh properly handle comments in .boot files - Include commit discription in testid.txt - Miscellaneous RCU changes: - Reduce synchronize_rcu() latency by reporting GP kthread's CPU QS early - Use suitable gfp_flags for the init_srcu_struct_nodes() - Fix rcu_read_unlock() deadloop due to softirq - Correctly compute probability to invoke ->exp_current() in rcutorture - Make expedited RCU CPU stall warnings detect stall-end races - RCU nocb: - Remove unnecessary WakeOvfIsDeferred wake path and callback overload handling - Extract nocb_defer_wakeup_cancel() helper* tag 'rcu.release.v7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/rcu/linux: (25 commits) rcu/nocb: Extract nocb_defer_wakeup_cancel() helper rcu/nocb: Remove dead callback overload handling rcu/nocb: Remove unnecessary WakeOvfIsDeferred wake path rcu: Reduce synchronize_rcu() latency by reporting GP kthread's CPU QS early srcu: Use suitable gfp_flags for the init_srcu_struct_nodes() rcu: Fix rcu_read_unlock() deadloop due to softirq rcutorture: Correctly compute probability to invoke ->exp_current() rcu: Make expedited RCU CPU stall warnings detect stall-end races rcutorture: Add --kill-previous option to terminate previous kvm.sh runs rcutorture: Prevent concurrent kvm.sh runs on same source tree torture: Include commit discription in testid.txt torture: Make config2csv.sh properly handle comments in .boot files torture: Make kvm-series.sh give run numbers and totals torture: Make kvm-series.sh give build numbers and totals torture: Parallelize kvm-series.sh guest-OS execution rcutorture: Add context checks to rcu_torture_timer() rcutorture: Test rcu_tasks_trace_expedite_current() srcu: Create an rcu_tasks_trace_expedite_current() function checkpatch: Deprecate rcu_read_{,un}lock_trace() rcu: Update Requirements.rst for RCU Tasks Trace ... List of files: /linux/init/init_task.c

377521af0341083bc9d196cf021ec7265dc47c20 - sched: remove task_struct->faults_disabled_mapping

Thu, 22 Jan 2026 08:52:23 +0000

sched: remove task_struct->faults_disabled_mappingThis reverts commit 2b69987be575 ("sched: Addtask_struct->faults_disabled_mapping"), which added this field withoutreview or maintainer signoff. With bcachefs removed from thetree it is also unused now.Signed-off-by: Christoph Hellwig Signed-off-by: Peter Zijlstra (Intel) Link: https://patch.msgid.link/20260122085223.487092-1-hch@lst.de List of files: /linux/init/init_task.c

cc4adab164b772a34b3340d644b7c4728498581e - Merge tag 'v6.19-rc1' into msm-next

Tue, 20 Jan 2026 22:06:55 +0000

Merge tag 'v6.19-rc1' into msm-nextMerge Linux 6.19-rc1 in order to catch up with other changes (e.g. UBWCconfig database defining UBWC_6).Signed-off-by: Dmitry Baryshkov List of files: /linux/init/init_task.c

60908279164a1dc651b7f4685cfbfe5161a4a797 - Merge branch 'rcu-tasks-trace.20260101a'

Sun, 04 Jan 2026 10:52:53 +0000

Merge branch 'rcu-tasks-trace.20260101a'* rcu-tasks-trace.20260101a: rcutorture: Test rcu_tasks_trace_expedite_current() srcu: Create an rcu_tasks_trace_expedite_current() function checkpatch: Deprecate rcu_read_{,un}lock_trace() rcu: Update Requirements.rst for RCU Tasks Trace rcu: Add noinstr-fast rcu_read_{,un}lock_tasks_trace() APIs rcu: Move rcu_tasks_trace_srcu_struct out of #ifdef CONFIG_TASKS_RCU_GENERIC rcu: Clean up after the SRCU-fastification of RCU Tasks Trace context_tracking: Remove rcu_task_trace_heavyweight_{enter,exit}() rcu: Re-implement RCU Tasks Trace in terms of SRCU-fast List of files: /linux/init/init_task.c

a73fc3dcc60b6d7a2075e2fbdca64fd53600f855 - rcu: Clean up after the SRCU-fastification of RCU Tasks Trace

Mon, 29 Dec 2025 19:10:58 +0000

rcu: Clean up after the SRCU-fastification of RCU Tasks TraceNow that RCU Tasks Trace has been re-implemented in terms of SRCU-fast,the ->trc_ipi_to_cpu, ->trc_blkd_cpu, ->trc_blkd_node, ->trc_holdout_list,and ->trc_reader_special task_struct fields are no longer used.In addition, the rcu_tasks_trace_qs(), rcu_tasks_trace_qs_blkd(),exit_tasks_rcu_finish_trace(), and rcu_spawn_tasks_trace_kthread(),show_rcu_tasks_trace_gp_kthread(), rcu_tasks_trace_get_gp_data(),rcu_tasks_trace_torture_stats_print(), and get_rcu_tasks_trace_gp_kthread()functions and all the other functions that they invoke are no longer used.Also, the TRC_NEED_QS and TRC_NEED_QS_CHECKED CPP macros are no longer used.Neither are the rcu_tasks_trace_lazy_ms and rcu_task_ipi_delay rcupdatemodule parameters and the TASKS_TRACE_RCU_READ_MB Kconfig option.This commit therefore removes all of them.[ paulmck: Apply Alexei Starovoitov feedback. ]Signed-off-by: Paul E. McKenney Cc: Andrii Nakryiko Cc: Alexei Starovoitov Cc: Peter Zijlstra Cc: bpf@vger.kernel.orgReviewed-by: Joel Fernandes Signed-off-by: Boqun Feng List of files: /linux/init/init_task.c

24f171c7e145f43b9f187578e89b0982ce87e54c - Merge tag 'asoc-fix-v6.19-rc1' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus

Sun, 21 Dec 2025 10:11:11 +0000

Merge tag 'asoc-fix-v6.19-rc1' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linusASoC: Fixes for v6.19We've been quite busy with fixes since the merge window, though not inany particularly exciting ways - the standout thing is the fix for _SXcontrols which were broken by a change to how we do clamping, otherwiseit's all fairly run of the mill fixes and quirks. List of files: /linux/init/init_task.c

5add3c3c280a35f7e258e9cef7607db5a2e56fdc - Merge drm/drm-next into drm-xe-next

Fri, 19 Dec 2025 10:51:22 +0000

Merge drm/drm-next into drm-xe-nextBackmerging to bring in 6.19-rc1. An important upstream bugfix andto help unblock PTL CI.Signed-off-by: Thomas Hellström List of files: /linux/init/init_task.c

b8304863a3990d0f18c38e5b94191830a63ee1af - Merge drm/drm-next into drm-intel-next

Mon, 15 Dec 2025 13:24:02 +0000

Merge drm/drm-next into drm-intel-nextSync-up some display code needed for Async flips refactor.Signed-off-by: Rodrigo Vivi List of files: /linux/init/init_task.c

84318277d6334c6981ab326d4acc87c6a6ddc9b8 - Merge remote-tracking branch 'drm/drm-fixes' into drm-misc-fixes

Mon, 15 Dec 2025 11:53:27 +0000

Merge remote-tracking branch 'drm/drm-fixes' into drm-misc-fixesPull in rc1 to include all changes since the merge window closed,and grab all fixes and changes from drm/drm-next.Signed-off-by: Maarten Lankhorst List of files: /linux/init/init_task.c

7f790dd21a931c61167f7bdc327aecf2cebad327 - Merge drm/drm-next into drm-misc-next

Mon, 15 Dec 2025 08:27:39 +0000

Merge drm/drm-next into drm-misc-nextLet's kickstart the v6.20 (7.0?) release cycle.Signed-off-by: Maxime Ripard List of files: /linux/init/init_task.c