This is an update on v0.4: https://lore.kernel.org/lkml/20210801200617.623745-1-posk@xxxxxxxxxx/ Key changes: v0.3 => v0.4: - made idle workers list logic simpler - only one idle server tracking - removed two fields from struct umcg_task - added timeout handling - added worker preemption - added a doc patch that now documents the syscalls and state transitions. v0.4 => v0.5: - refactored idle workers list management, as suggested by Thierry Delisle here: https://lore.kernel.org/lkml/3530714d-125b-e0f5-45b2-72695e2fc4ee@xxxxxxxxxxxx/ I will now clean up libumcg (userspace) and selftests and post them in a follow-up patchset. Peter Oskolkov (4): sched/umcg: add WF_CURRENT_CPU and externise ttwu sched/umcg: RFC: add userspace atomic helpers sched/umcg: RFC: implement UMCG syscalls sched/umcg: add Documentation/userspace-api/umcg.rst Documentation/userspace-api/umcg.rst | 546 ++++++++++++++++++++++ arch/x86/entry/syscalls/syscall_64.tbl | 2 + include/linux/sched.h | 6 + include/linux/syscalls.h | 4 + include/uapi/asm-generic/unistd.h | 8 +- include/uapi/linux/umcg.h | 114 +++++ init/Kconfig | 10 + kernel/exit.c | 7 + kernel/sched/Makefile | 1 + kernel/sched/core.c | 20 +- kernel/sched/fair.c | 4 + kernel/sched/sched.h | 15 +- kernel/sched/umcg.c | 618 +++++++++++++++++++++++++ kernel/sched/umcg.h | 325 +++++++++++++ kernel/sys_ni.c | 4 + 15 files changed, 1673 insertions(+), 11 deletions(-) create mode 100644 Documentation/userspace-api/umcg.rst create mode 100644 include/uapi/linux/umcg.h create mode 100644 kernel/sched/umcg.c create mode 100644 kernel/sched/umcg.h -- 2.25.1
