Peter Zijlstra 1628b25248 sched: Add blocked_donor link to task for smarter mutex handoffs ...

Add link to the task this task is proxying for, and use it so
the mutex owner can do an intelligent hand-off of the mutex to
the task that the owner is running on behalf.

[jstultz: This patch was split out from larger proxy patch]
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Juri Lelli <juri.lelli@redhat.com>
Signed-off-by: Valentin Schneider <valentin.schneider@arm.com>
Signed-off-by: Connor O'Brien <connoro@google.com>
Signed-off-by: John Stultz <jstultz@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260512025635.2840817-8-jstultz@google.com

2026-06-02 12:26:07 +02:00

..

bpf

Merge tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf

2026-04-17 15:58:22 -07:00

cgroup

Merge tag 'cgroup-for-7.1-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup

2026-04-27 16:51:27 -07:00

configs

Remove WARN_ALL_UNSEEDED_RANDOM kernel config option

2026-02-23 11:18:48 -08:00

debug

kgdb: update outdated references to kgdb_wait()

2026-04-21 16:41:54 +01:00

dma

Merge tag 'memblock-v7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock

2026-04-18 11:29:14 -07:00

entry

Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

2026-04-14 16:48:56 -07:00

events

Merge tag 'mm-stable-2026-04-13-21-45' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2026-04-15 12:59:16 -07:00

futex

futex: Prevent lockup in requeue-PI during signal/ timeout wakeup

2026-04-29 08:56:40 +02:00

gcov

Convert more 'alloc_obj' cases to default GFP_KERNEL arguments

2026-02-21 20:03:00 -08:00

irq

genirq/chip: Invoke add_interrupt_randomness() in handle_percpu_devid_irq()

2026-04-02 23:03:29 +02:00

kcsan

kcsan: test: Adjust "expect" allocation type for kmalloc_obj

2026-02-26 09:54:08 -08:00

livepatch

…

liveupdate

kho: fix error handling in kho_add_subtree()

2026-04-27 05:54:23 -07:00

locking

sched: Add blocked_donor link to task for smarter mutex handoffs

2026-06-02 12:26:07 +02:00

module

module: Simplify warning on positive returns from module_init()

2026-04-04 00:04:48 +00:00

power

Merge branches 'pm-cpuidle', 'pm-opp' and 'pm-sleep'

2026-04-10 12:37:27 +02:00

printk

Merge branch 'rework/prb-fixes' into for-linus

2026-04-20 13:42:01 +02:00

rcu

Merge tag 'rcu.2026.03.31a' of git://git.kernel.org/pub/scm/linux/kernel/git/rcu/linux

2026-04-13 09:36:45 -07:00

sched

sched: Add blocked_donor link to task for smarter mutex handoffs

2026-06-02 12:26:07 +02:00

time

clockevents: Add missing resets of the next_event_forced flag

2026-04-16 21:22:04 +02:00

trace

sched/clock: Provide !HAVE_UNSTABLE_SCHED_CLOCK stub for sched_clock_stable()

2026-05-19 12:17:35 +02:00

unwind

Convert more 'alloc_obj' cases to default GFP_KERNEL arguments

2026-02-21 20:03:00 -08:00

.gitignore

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acct.c

Merge tag 'vfs-7.1-rc1.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

2026-04-13 14:20:11 -07:00

async.c

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audit_fsnotify.c

audit: widen ino fields to u64

2026-03-06 14:31:26 +01:00

audit_tree.c

Convert 'alloc_flex' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

audit_watch.c

audit: widen ino fields to u64

2026-03-06 14:31:26 +01:00

audit.c

audit: handle unknown status requests in audit_receive_msg()

2026-03-10 15:22:43 -04:00

audit.h

audit: widen ino fields to u64

2026-03-06 14:31:26 +01:00

auditfilter.c

audit: fix coding style issues

2026-03-05 22:16:08 -05:00

auditsc.c

audit: widen ino fields to u64

2026-03-06 14:31:26 +01:00

backtracetest.c

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bounds.c

…

capability.c

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cfi.c

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compat.c

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configs.c

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context_tracking.c

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cpu_pm.c

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cpu.c

…

crash_core_test.c

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crash_core.c

kernel/crash: remove inclusion of crypto/sha1.h

2026-03-27 21:19:46 -07:00

crash_dump_dm_crypt.c

crash_dump/dm-crypt: don't print in arch-specific code

2026-04-02 23:36:24 -07:00

crash_reserve.c

kernel/crash: remove inclusion of crypto/sha1.h

2026-03-27 21:19:46 -07:00

cred.c

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delayacct.c

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dma.c

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elfcorehdr.c

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exec_domain.c

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exit.c

Merge branch 'sched/cache'

2026-05-19 12:18:01 +02:00

exit.h

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extable.c

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fail_function.c

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fork.c

sched: Add blocked_donor link to task for smarter mutex handoffs

2026-06-02 12:26:07 +02:00

freezer.c

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gen_kheaders.sh

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groups.c

…

hung_task.c

hung_task: explicitly report I/O wait state in log output

2026-03-27 21:19:40 -07:00

iomem.c

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irq_work.c

kernel: Use trace_call__##name() at guarded tracepoint call sites

2026-03-26 08:28:49 -04:00

jump_label.c

jump_label: use ATOMIC_INIT() for initialization of .enabled

2026-03-16 13:16:48 +01:00

kallsyms_internal.h

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kallsyms_selftest.c

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kallsyms_selftest.h

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kallsyms.c

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kcmp.c

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Kconfig.freezer

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Kconfig.hz

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Kconfig.kexec

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Kconfig.locks

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Kconfig.preempt

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kcov.c

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kexec_core.c

kernel/kexec: remove inclusion of crypto/hash.h

2026-03-27 21:19:46 -07:00

kexec_elf.c

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kexec_file.c

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kexec_internal.h

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kexec.c

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kheaders.c

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kprobes.c

kprobes: Remove unneeded warnings from __arm_kprobe_ftrace()

2026-03-13 23:15:26 +09:00

kstack_erase.c

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ksyms_common.c

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ksysfs.c

kernel: ksysfs: initialize kernel_kobj earlier

2026-04-03 19:39:52 +02:00

kthread.c

kthread: consolidate kthread exit paths to prevent use-after-free

2026-02-26 10:45:49 +01:00

latencytop.c

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Makefile

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module_signature.c

module: Give 'enum pkey_id_type' a more specific name

2026-03-24 21:42:37 +00:00

notifier.c

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nscommon.c

nsfs: tighten permission checks for ns iteration ioctls

2026-02-27 22:00:08 +01:00

nsproxy.c

Merge tag 'vfs-7.1-rc1.mount.v2' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

2026-04-14 19:59:25 -07:00

nstree.c

nstree: tighten permission checks for listing

2026-02-27 22:00:11 +01:00

padata.c

padata: Put CPU offline callback in ONLINE section to allow failure

2026-03-22 11:17:59 +09:00

panic.c

kernel/panic: mark init_taint_buf as __initdata and panic instead of warning in alloc_taint_buf()

2026-03-27 21:19:33 -07:00

params.c

module: Clean up parse_args() arguments

2026-03-18 21:43:18 +00:00

pid_namespace.c

pid_namespace: allow opening pid_for_children before init was created

2026-03-20 14:44:26 +01:00

pid_sysctl.h

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pid.c

Merge tag 'mm-nonmm-stable-2026-04-15-04-20' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2026-04-16 20:11:56 -07:00

profile.c

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ptrace.c

clone: add CLONE_AUTOREAP

2026-03-11 23:14:02 +01:00

range.c

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reboot.c

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regset.c

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relay.c

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resource_kunit.c

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resource.c

PCI: Align head space better

2026-03-27 10:19:08 -05:00

rseq.c

rseq: Reenable performance optimizations conditionally

2026-05-06 17:40:27 +02:00

scftorture.c

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scs.c

…

seccomp.c

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signal.c

Merge tag 'mm-nonmm-stable-2026-04-15-04-20' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2026-04-16 20:11:56 -07:00

smp.c

Merge tag 'trace-v7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace

2026-04-17 09:43:12 -07:00

smpboot.c

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smpboot.h

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softirq.c

softirq: Prepare for deferred hrtimer rearming

2026-02-27 16:40:13 +01:00

stacktrace.c

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static_call_inline.c

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static_call.c

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stop_machine.c

sched: Simplify ifdeffery around cpu_smt_mask

2026-05-19 12:17:37 +02:00

sys_ni.c

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sys.c

prctl: cfi: change the branch landing pad prctl()s to be more descriptive

2026-04-04 18:40:58 -06:00

sysctl-test.c

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sysctl.c

sysctl: fix uninitialized variable in proc_do_large_bitmap

2026-03-26 09:32:19 +01:00

task_work.c

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taskstats.c

taskstats: set version in TGID exit notifications

2026-04-15 02:15:02 -07:00

torture.c

torture: Avoid modulo-zero error in torture_hrtimeout_ns()

2026-03-30 15:48:14 -04:00

tracepoint.c

tracepoint: balance regfunc() on func_add() failure in tracepoint_add_func()

2026-04-14 05:17:02 -04:00

tsacct.c

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ucount.c

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uid16.c

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uid16.h

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umh.c

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up.c

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user_namespace.c

Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses

2026-02-22 08:26:33 -08:00

user-return-notifier.c

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user.c

…

utsname_sysctl.c

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utsname.c

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vhost_task.c

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vmcore_info.c

Merge tag 'mm-nonmm-stable-2026-04-15-04-20' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2026-04-16 20:11:56 -07:00

watch_queue.c

Convert 'alloc_flex' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

watchdog_buddy.c

watchdog/hardlockup: improve buddy system detection timeliness

2026-03-27 21:19:47 -07:00

watchdog_perf.c

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watchdog.c

watchdog/hardlockup: improve buddy system detection timeliness

2026-03-27 21:19:47 -07:00

workqueue_internal.h

workqueue: Show in-flight work item duration in stall diagnostics

2026-03-05 07:27:48 -10:00

workqueue.c

sched: Simplify ifdeffery around cpu_smt_mask

2026-05-19 12:17:37 +02:00