# git rev-parse -q --verify 8f7c8b88bda4988f44e595a760438febf51c92c8^{commit}
8f7c8b88bda4988f44e595a760438febf51c92c8
already have revision, skipping fetch
# git checkout -q -f -B kisskb 8f7c8b88bda4988f44e595a760438febf51c92c8
# git clean -qxdf
# < git log -1
# commit 8f7c8b88bda4988f44e595a760438febf51c92c8
# Merge: 7586d5276515 6b8950ef993b
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Wed Nov 20 10:08:00 2024 -0800
# 
#     Merge tag 'sched_ext-for-6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext
#     
#     Pull sched_ext updates from Tejun Heo:
#     
#      - Improve the default select_cpu() implementation making it topology
#        aware and handle WAKE_SYNC better.
#     
#      - set_arg_maybe_null() was used to inform the verifier which ops args
#        could be NULL in a rather hackish way. Use the new __nullable CFI
#        stub tags instead.
#     
#      - On Sapphire Rapids multi-socket systems, a BPF scheduler, by
#        hammering on the same queue across sockets, could live-lock the
#        system to the point where the system couldn't make reasonable forward
#        progress.
#     
#        This could lead to soft-lockup triggered resets or stalling out
#        bypass mode switch and thus BPF scheduler ejection for tens of
#        minutes if not hours. After trying a number of mitigations, the
#        following set worked reliably:
#     
#          - Injecting artificial cpu_relax() loops in two places while
#            sched_ext is trying to turn on the bypass mode.
#     
#          - Triggering scheduler ejection when soft-lockup detection is
#            imminent (a quarter of threshold left).
#     
#        While not the prettiest, the impact both in terms of code complexity
#        and overhead is minimal.
#     
#      - A common complaint on the API is the overuse of the word "dispatch"
#        and the confusion around "consume". This is due to how the dispatch
#        queues became more generic over time. Rename the affected kfuncs for
#        clarity. Thanks to BPF's compatibility features, this change can be
#        made in a way that's both forward and backward compatible. The
#        compatibility code will be dropped in a few releases.
#     
#      - Other misc changes
#     
#     * tag 'sched_ext-for-6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext: (21 commits)
#       sched_ext: Replace scx_next_task_picked() with switch_class() in comment
#       sched_ext: Rename scx_bpf_dispatch[_vtime]_from_dsq*() -> scx_bpf_dsq_move[_vtime]*()
#       sched_ext: Rename scx_bpf_consume() to scx_bpf_dsq_move_to_local()
#       sched_ext: Rename scx_bpf_dispatch[_vtime]() to scx_bpf_dsq_insert[_vtime]()
#       sched_ext: scx_bpf_dispatch_from_dsq_set_*() are allowed from unlocked context
#       sched_ext: add a missing rcu_read_lock/unlock pair at scx_select_cpu_dfl()
#       sched_ext: Clarify sched_ext_ops table for userland scheduler
#       sched_ext: Enable the ops breather and eject BPF scheduler on softlockup
#       sched_ext: Avoid live-locking bypass mode switching
#       sched_ext: Fix incorrect use of bitwise AND
#       sched_ext: Do not enable LLC/NUMA optimizations when domains overlap
#       sched_ext: Introduce NUMA awareness to the default idle selection policy
#       sched_ext: Replace set_arg_maybe_null() with __nullable CFI stub tags
#       sched_ext: Rename CFI stubs to names that are recognized by BPF
#       sched_ext: Introduce LLC awareness to the default idle selection policy
#       sched_ext: Clarify ops.select_cpu() for single-CPU tasks
#       sched_ext: improve WAKE_SYNC behavior for default idle CPU selection
#       sched_ext: Use btf_ids to resolve task_struct
#       sched/ext: Use tg_cgroup() to elieminate duplicate code
#       sched/ext: Fix unmatch trailing comment of CONFIG_EXT_GROUP_SCHED
#       ...
# < /opt/cross/kisskb/korg/gcc-13.1.0-nolibc/or1k-linux/bin/or1k-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-13.1.0-nolibc/or1k-linux/bin/or1k-linux-ld --version
# < git log --format=%s --max-count=1 8f7c8b88bda4988f44e595a760438febf51c92c8
# make -s -j 160 ARCH=openrisc O=/kisskb/build/linus_or1ksim_defconfig_or32-gcc13 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-13.1.0-nolibc/or1k-linux/bin/or1k-linux-  or1ksim_defconfig
# < make -s -j 160 ARCH=openrisc O=/kisskb/build/linus_or1ksim_defconfig_or32-gcc13 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-13.1.0-nolibc/or1k-linux/bin/or1k-linux-  help
# make -s -j 160 ARCH=openrisc O=/kisskb/build/linus_or1ksim_defconfig_or32-gcc13 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-13.1.0-nolibc/or1k-linux/bin/or1k-linux-  olddefconfig
# make -s -j 160 ARCH=openrisc O=/kisskb/build/linus_or1ksim_defconfig_or32-gcc13 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-13.1.0-nolibc/or1k-linux/bin/or1k-linux-  
Completed OK
# rm -rf /kisskb/build/linus_or1ksim_defconfig_or32-gcc13
# Build took: 0:01:21.480340