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linux/tools
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Tejun Heo 9e8581a090 sched_ext: Sync common and compat headers from the scx repo 
Sync common.bpf.h, compat.bpf.h and compat.h with the scx repo, which
accumulated the following:

- __COMPAT_read_enum() can now recover 64-bit scx enum values from kernel
  BTF generated without BTF_KIND_ENUM64 support (pahole < 1.24 or
  --skip_encoding_btf_enum64, e.g. COS/GKE kernels), substituting values
  from the build-time vmlinux.h cross-checked against the low 32 bits the
  kernel does provide.

- is_migration_disabled() no longer assumes the BPF prolog always disables
  migration. Since 8e4f0b1ebc ("bpf: use rcu_read_lock_dont_migrate() for
  trampoline.c") the prolog only does so under CONFIG_PREEMPT_RCU, so the
  old current-task test under-reported on v6.18+ !PREEMPT_RCU kernels. A
  runtime probe on bpf_scx_reg() handles older kernels with backported
  trampoline behavior.

- __COMPAT_scx_bpf_dsq_peek() is gated behind kernel v7.1 where 2f2ea77092
  ("sched_ext: Use dsq->first_task instead of list_empty() in
  dispatch_enqueue() FIFO-tail") fixed the kfunc spuriously returning NULL
  on non-empty FIFO DSQs, and the new
  scx_bpf_reenqueue_local_from_anywhere() provides a callable-from-anywhere
  reenqueue which prefers the generic scx_bpf_dsq_reenq(). Both were first
  posted by Gavin Guo and Changwoo Min and are picked up here with the
  review feedback folded in.

- __COMPAT_scx_bpf_cpu_curr() and the scx_bpf_cpu_rq() declaration are
  restored. Schedulers built from these headers still run on pre-v6.18
  kernels where scx_bpf_cpu_curr() does not resolve and the scx_bpf_cpu_rq()
  fallback still exists.

- scx_clock_task() and scx_clock_pelt() document their stale-read behavior
  for remote idle CPUs under NO_HZ_IDLE.

Link: https://lore.kernel.org/all/20260817143126.562923-1-changwoo@igalia.com
Signed-off-by: Tejun Heo <tj@kernel.org>
2026-08-21 21:19:26 -10:00
..
accounting tools/accounting/getdelays: fix -Wformat-truncation warning in format_timespec 2026-05-28 21:24:40 -07:00
arch tools headers: Sync KVM headers with the kernel sources 2026-07-21 21:00:10 -03:00
bootconfig Bootconfig updates for v7.2 2026-06-16 17:29:24 +05:30
bpf bpf: Do not print a newline after disassembly in bpf_verbose_insn() 2026-08-08 11:05:49 +02:00
build perf tools changes for v7.2: 2026-06-23 11:34:49 -07:00
certs
cgroup
counter
crypto
debugging
dma
docs
firewire
firmware
gpio
hv
iio iio: core: Add IIO_COVERAGE channel type 2026-05-31 11:01:50 +01:00
include Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf 7.2-rc7 2026-08-07 23:04:17 +02:00
kvm/kvm_stat
laptop
leds
lib libbpf: Export btf__find_by_name_kind_own() 2026-07-30 12:48:08 -07:00
memory-model
mm slab changes for 7.2 - part 2 2026-06-22 08:28:48 -07:00
net tools/ynl: add missing uapi header deps in Makefile.deps 2026-06-24 19:30:55 -07:00
objtool objtool/rust: add one more noreturn Rust function for Rust 1.99.0 2026-07-11 14:20:54 +02:00
pcmcia
perf tools headers: Sync UAPI linux/fs.h with the kernel sources 2026-07-21 21:00:10 -03:00
power platform-drivers-x86 for v7.2-1 2026-06-23 08:31:33 -07:00
rcu
sched
sched_ext sched_ext: Sync common and compat headers from the scx repo 2026-08-21 21:19:26 -10:00
scripts
sound
spi
testing sched_ext: Merge branch 'for-7.3-arena-args' into for-7.3 2026-08-17 11:20:34 -10:00
thermal
time
tracing rtla/timerlat_top: Fix on-threshold actions firing on signal 2026-07-21 15:42:08 +02:00
unittests docs: kernel-doc: python: strip __counted_by_ptr macro 2026-05-15 08:11:36 -06:00
usb usbip: tools: support SuperSpeedPlus devices 2026-07-08 13:29:13 +02:00
verification verification/rvgen: Fix ltl2k writing True as a literal 2026-06-04 16:44:25 +02:00
virtio tools/virtio: add missing compat definitions for vhost_net_test 2026-07-01 19:02:56 -07:00
wmi
workqueue
writeback
Makefile