Changes in Makefile

6a8dab043c649450ee58c84c3c6051def96778ed - Merge tag 'sched_ext-for-7.0-rc2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext

Tue, 03 Mar 2026 23:14:20 +0100

Merge tag 'sched_ext-for-7.0-rc2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_extPull sched_ext fixes from Tejun Heo: - Fix starvation of scx_enable() under fair-class saturation by offloading the enable path to an RT kthread - Fix out-of-bounds access in idle mask initialization on systems with non-contiguous NUMA node IDs - Fix a preemption window during scheduler exit and a refcount underflow in cgroup init error path - Fix SCX_EFLAG_INITIALIZED being a no-op flag - Add READ_ONCE() annotations for KCSAN-clean lockless accesses and replace naked scx_root dereferences with container_of() in kobject callbacks - Tooling and selftest fixes: compilation issues with clang 17, strtoul() misuse, unused options cleanup, and Kconfig sync* tag 'sched_ext-for-7.0-rc2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext: sched_ext: Fix starvation of scx_enable() under fair-class saturation sched_ext: Remove redundant css_put() in scx_cgroup_init() selftests/sched_ext: Fix peek_dsq.bpf.c compile error for clang 17 selftests/sched_ext: Add -fms-extensions to bpf build flags tools/sched_ext: Add -fms-extensions to bpf build flags sched_ext: Use READ_ONCE() for plain reads of scx_watchdog_timeout sched_ext: Replace naked scx_root dereferences in kobject callbacks sched_ext: Use READ_ONCE() for the read side of dsq->nr update tools/sched_ext: fix strtoul() misuse in scx_hotplug_seq() sched_ext: Fix SCX_EFLAG_INITIALIZED being a no-op flag sched_ext: Fix out-of-bounds access in scx_idle_init_masks() sched_ext: Disable preemption between scx_claim_exit() and kicking helper work tools/sched_ext: Add Kconfig to sync with upstream tools/sched_ext: Sync README.md Kconfig with upstream scx selftests/sched_ext: Remove duplicated unistd.h include in rt_stall.c tools/sched_ext: scx_sdt: Remove unused '-f' option tools/sched_ext: scx_central: Remove unused '-p' option selftests/sched_ext: Fix unused-result warning for read() selftests/sched_ext: Abort test loop on signal List of files: /linux/tools/sched_ext/Makefile

9af832c0a76eedce169c4c6360e4e20d8a0c9ab1 - tools/sched_ext: Add -fms-extensions to bpf build flags

Tue, 03 Mar 2026 08:23:15 +0100

tools/sched_ext: Add -fms-extensions to bpf build flagsSimilar to commit 835a50753579 ("selftests/bpf: Add -fms-extensions tobpf build flags") and commit 639f58a0f480 ("bpftool: Fix build warningsdue to MS extensions")The kernel is now built with -fms-extensions, thereforegenerated vmlinux.h contains types like:struct aes_key { struct aes_enckey; union aes_invkey_arch inv_k;};struct ns_common { ... union { struct ns_tree; struct callback_head ns_rcu; };};Which raise warning like below when building scx scheduler:tools/sched_ext/build/include/vmlinux.h:50533:3: warning:declaration does not declare anything [-Wmissing-declarations] 50533 | struct ns_tree; | ^Fix it by using -fms-extensions and -Wno-microsoft-anon-tag flagsto build bpf programs that #include "vmlinux.h"Signed-off-by: Zhao Mengmeng Reviewed-by: Andrea Righi Signed-off-by: Tejun Heo List of files: /linux/tools/sched_ext/Makefile

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

Mon, 23 Feb 2026 10:09:45 +0100

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/tools/sched_ext/Makefile

38ef046544aad88de3b520f38fa3eed2c44dc0a8 - Merge tag 'sched_ext-for-6.20' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext

Wed, 11 Feb 2026 22:35:24 +0100

Merge tag 'sched_ext-for-6.20' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_extPull sched_ext updates from Tejun Heo: - Move C example schedulers back from the external scx repo to tools/sched_ext as the authoritative source. scx_userland and scx_pair are returning while scx_sdt (BPF arena-based task data management) is new. These schedulers will be dropped from the external repo. - Improve error reporting by adding scx_bpf_error() calls when DSQ creation fails across all in-tree schedulers - Avoid redundant irq_work_queue() calls in destroy_dsq() by only queueing when llist_add() indicates an empty list - Fix flaky init_enable_count selftest by properly synchronizing pre-forked children using a pipe instead of sleep()* tag 'sched_ext-for-6.20' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext: selftests/sched_ext: Fix init_enable_count flakiness tools/sched_ext: Fix data header access during free in scx_sdt tools/sched_ext: Add error logging for dsq creation failures in remaining schedulers tools/sched_ext: add arena based scheduler tools/sched_ext: add scx_pair scheduler tools/sched_ext: add scx_userland scheduler sched_ext: Add error logging for dsq creation failures sched_ext: Avoid multiple irq_work_queue() calls in destroy_dsq() List of files: /linux/tools/sched_ext/Makefile

36929ebd17ae66ed3acde9056a9daf611d81a2e5 - tools/sched_ext: add arena based scheduler

Fri, 23 Jan 2026 04:26:05 +0100

tools/sched_ext: add arena based schedulerAdd a scheduler that uses BPF arenas to manage task context data.Signed-off-by: Emil Tsalapatis Signed-off-by: Tejun Heo List of files: /linux/tools/sched_ext/Makefile

f0262b102c7ce43f3744bdb0278ddf0d15bb1a71 - tools/sched_ext: add scx_pair scheduler

Fri, 23 Jan 2026 04:26:04 +0100

tools/sched_ext: add scx_pair schedulerAdd the scx_pair cgroup-based core scheduler.Cc: Tejun Heo Cc: David Vernet Signed-off-by: Emil Tsalapatis Signed-off-by: Tejun Heo List of files: /linux/tools/sched_ext/Makefile

cc4448d0856d424e52b5f53b2592575598233eac - tools/sched_ext: add scx_userland scheduler

Fri, 23 Jan 2026 04:26:03 +0100

tools/sched_ext: add scx_userland schedulerAdd in the scx_userland scheduler that does vruntime-basedscheduling in userspace code and communicates schedulingdecisions to BPF by accessing and modifying globals throughthe skeleton.Cc: Tejun Heo Cc: David Vernet Signed-off-by: Emil Tsalapatis Signed-off-by: Tejun Heo List of files: /linux/tools/sched_ext/Makefile

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

Tue, 20 Jan 2026 23:06:55 +0100

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/tools/sched_ext/Makefile

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

Fri, 19 Dec 2025 11:51:22 +0100

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/tools/sched_ext/Makefile

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

Mon, 15 Dec 2025 14:24:02 +0100

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/tools/sched_ext/Makefile

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

Mon, 15 Dec 2025 09:27:39 +0100

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/tools/sched_ext/Makefile

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 11:11:11 +0100

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/tools/sched_ext/Makefile

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

Mon, 15 Dec 2025 12:53:27 +0100

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/tools/sched_ext/Makefile

f088104d837a991c65e51fa30bb4196169b3244d - Merge drm/drm-next into drm-intel-gt-next

Tue, 16 Sep 2025 12:53:20 +0200

Merge drm/drm-next into drm-intel-gt-nextBackmerge in order to get the commit: 048832a3f400 ("drm/i915: Refactor shmem_pwrite() to use kiocb and write_iter")To drm-intel-gt-next as there are followup fixes to be applied.Signed-off-by: Joonas Lahtinen List of files: /linux/tools/sched_ext/Makefile

02baaa67d9afc2e56c6e1ac6a1fb1f1dd2be366f - Merge tag 'sched_ext-for-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext

Wed, 03 Dec 2025 22:25:39 +0100

Merge tag 'sched_ext-for-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_extPull sched_ext updates from Tejun Heo: - Improve recovery from misbehaving BPF schedulers. When a scheduler puts many tasks with varying affinity restrictions on a shared DSQ, CPUs scanning through tasks they cannot run can overwhelm the system, causing lockups. Bypass mode now uses per-CPU DSQs with a load balancer to avoid this, and hooks into the hardlockup detector to attempt recovery. Add scx_cpu0 example scheduler to demonstrate this scenario. - Add lockless peek operation for DSQs to reduce lock contention for schedulers that need to query queue state during load balancing. - Allow scx_bpf_reenqueue_local() to be called from anywhere in preparation for deprecating cpu_acquire/release() callbacks in favor of generic BPF hooks. - Prepare for hierarchical scheduler support: add scx_bpf_task_set_slice() and scx_bpf_task_set_dsq_vtime() kfuncs, make scx_bpf_dsq_insert*() return bool, and wrap kfunc args in structs for future aux__prog parameter. - Implement cgroup_set_idle() callback to notify BPF schedulers when a cgroup's idle state changes. - Fix migration tasks being incorrectly downgraded from stop_sched_class to rt_sched_class across sched_ext enable/disable. Applied late as the fix is low risk and the bug subtle but needs stable backporting. - Various fixes and cleanups including cgroup exit ordering, SCX_KICK_WAIT reliability, and backward compatibility improvements.* tag 'sched_ext-for-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext: (44 commits) sched_ext: Fix incorrect sched_class settings for per-cpu migration tasks sched_ext: tools: Removing duplicate targets during non-cross compilation sched_ext: Use kvfree_rcu() to release per-cpu ksyncs object sched_ext: Pass locked CPU parameter to scx_hardlockup() and add docs sched_ext: Update comments replacing breather with aborting mechanism sched_ext: Implement load balancer for bypass mode sched_ext: Factor out abbreviated dispatch dequeue into dispatch_dequeue_locked() sched_ext: Factor out scx_dsq_list_node cursor initialization into INIT_DSQ_LIST_CURSOR sched_ext: Add scx_cpu0 example scheduler sched_ext: Hook up hardlockup detector sched_ext: Make handle_lockup() propagate scx_verror() result sched_ext: Refactor lockup handlers into handle_lockup() sched_ext: Make scx_exit() and scx_vexit() return bool sched_ext: Exit dispatch and move operations immediately when aborting sched_ext: Simplify breather mechanism with scx_aborting flag sched_ext: Use per-CPU DSQs instead of per-node global DSQs in bypass mode sched_ext: Refactor do_enqueue_task() local and global DSQ paths sched_ext: Use shorter slice in bypass mode sched_ext: Mark racy bitfields to prevent adding fields that can't tolerate races sched_ext: Minor cleanups to scx_task_iter ... List of files: /linux/tools/sched_ext/Makefile

06a7415cf24774baf1945fc28ea152e888bd72bb - sched_ext: tools: Removing duplicate targets during non-cross compilation

Tue, 18 Nov 2025 06:37:13 +0100

sched_ext: tools: Removing duplicate targets during non-cross compilationWhen cross-compilation is not used, BPFOBJ and HOST_BPFOBJ are identicalfiles, libbpf.a, and duplicate libbpf.a files should be removed.Signed-off-by: Rong Tao Signed-off-by: Tejun Heo List of files: /linux/tools/sched_ext/Makefile

c948d9f80c675aad91d1510afed207df421b68e5 - sched_ext: Add scx_cpu0 example scheduler

Tue, 11 Nov 2025 20:18:13 +0100

sched_ext: Add scx_cpu0 example schedulerAdd scx_cpu0, a simple scheduler that queues all tasks to a single DSQ andonly dispatches them from CPU0 in FIFO order. This is useful for testing bypassbehavior when many tasks are concentrated on a single CPU. If the load balancerdoesn't work, bypass mode can trigger task hangs or RCU stalls as the queue islong and there's only one CPU working on it.v2: Check whether task is on CPU0 at enqueue using scx_bpf_task_cpu() instead of nr_cpus_allowed (Andrea Righi).Cc: Dan Schatzberg Cc: Emil Tsalapatis Reviewed-by: Andrea Righi Signed-off-by: Tejun Heo List of files: /linux/tools/sched_ext/Makefile

ab93e0dd72c37d378dd936f031ffb83ff2bd87ce - Merge branch 'next' into for-linus

Wed, 06 Aug 2025 19:08:54 +0200

Merge branch 'next' into for-linusPrepare input updates for 6.17 merge window. List of files: /linux/tools/sched_ext/Makefile

a7bee4e7f78089c101be2ad51f4b5ec64782053e - Merge tag 'ib-mfd-gpio-input-pwm-v6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd into next

Mon, 04 Aug 2025 08:28:48 +0200

Merge tag 'ib-mfd-gpio-input-pwm-v6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd into nextMerge an immutable branch between MFD, GPIO, Input and PWM to resolveconflicts for the merge window pull request. List of files: /linux/tools/sched_ext/Makefile

74f1af95820fc2ee580a775a3a17c416db30b38c - Merge remote-tracking branch 'drm/drm-next' into msm-next

Sun, 29 Jun 2025 04:54:49 +0200

Merge remote-tracking branch 'drm/drm-next' into msm-nextBack-merge drm-next to (indirectly) get arm-smmu updates for makingstall-on-fault more reliable.Signed-off-by: Rob Clark List of files: /linux/tools/sched_ext/Makefile