Hello, Ingo, Back to the usual branched format! ;-) This pull request contains the following changes: 1. Documentation updates. http://lkml.kernel.org/r/20170724213605.GA8766@xxxxxxxxxxxxxxxxxx 2. Miscellaneous fixes. http://lkml.kernel.org/r/20170724214425.GA9665@xxxxxxxxxxxxxxxxxx (But note that I have dropped the cond_resched() commit.) 3. CPU-hotplug fixes. http://lkml.kernel.org/r/20170724215139.GA10881@xxxxxxxxxxxxxxxxxx 4. Miscellaneous non-RCU fixes. http://lkml.kernel.org/r/20170731225159.GA2674@xxxxxxxxxxxxxxxxxx http://lkml.kernel.org/r/20170728204040.568-1-mathieu.desnoyers@xxxxxxxxxxxx 5. Removal of spin_unlock_wait(). http://lkml.kernel.org/r/20170731225754.GB2674@xxxxxxxxxxxxxxxxxx http://lkml.kernel.org/r/20170811201247.GH3730@xxxxxxxxxxxxxxxxxx 6. SRCU updates. http://lkml.kernel.org/r/20170724221511.GA15085@xxxxxxxxxxxxxxxxxx 7. Torture-test updates. http://lkml.kernel.org/r/20170724222326.GA15933@xxxxxxxxxxxxxxxxxx All of these changes have been subjected to 0day Test Robot and -next testing, and are available in the git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git for-mingo for you to fetch changes up to 656e7c0c0a2e8d899f87fd7f081ea7a711146604: Merge branches 'doc.2017.08.17a', 'fixes.2017.08.17a', 'hotplug.2017.07.25b', 'misc.2017.08.17a', 'spin_unlock_wait_no.2017.08.17a', 'srcu.2017.07.27c' and 'torture.2017.07.24c' into HEAD (2017-08-17 08:10:04 -0700) ---------------------------------------------------------------- Joe Perches (1): module: Fix pr_fmt() bug for header use of printk Luis R. Rodriguez (2): swait: Add idle variants which don't contribute to load average rcu: Use idle versions of swait to make idle-hack clear Manfred Spraul (1): net/netfilter/nf_conntrack_core: Fix net_conntrack_lock() Masami Hiramatsu (1): rcu/tracing: Set disable_rcu_irq_enter on rcu_eqs_exit() Mathieu Desnoyers (1): membarrier: Provide expedited private command Oleg Nesterov (1): task_work: Replace spin_unlock_wait() with lock/unlock pair Paul E. McKenney (55): documentation: Fix relation between nohz_full and rcu_nocbs init_task: Remove redundant INIT_TASK_RCU_TREE_PREEMPT() macro srcu: Move rcu_scheduler_starting() from Tiny RCU to Tiny SRCU rcutorture: Remove obsolete SRCU-C.boot srcu: Make process_srcu() be static rcutorture: Move SRCU status printing to SRCU implementations rcutorture: Print SRCU lock/unlock totals rcu: Remove CONFIG_TASKS_RCU ifdef from rcuperf.c rcutorture: Select CONFIG_PROVE_LOCKING for Tiny SRCU scenario torture: Add --kconfig argument to kvm.sh rcutorture: Don't wait for kernel when all builds fail rcutorture: Enable SRCU readers from timer handler rcutorture: Place event-traced strings into trace buffer rcutorture: Use nr_cpus rather than maxcpus to limit test size rcutorture: Add task's CPU for rcutorture writer stalls rcutorture: Eliminate unused ts_rem local from rcu_trace_clock_local() rcu: Add last-CPU to GP-kthread starvation messages rcutorture: Invoke call_rcu() from timer handler rcu: Use timer as backstop for NOCB deferred wakeups atomics: Revert addition of comment header to spin_unlock_wait() rcu: Migrate callbacks earlier in the CPU-offline timeline rcu: Make expedited GPs correctly handle hardware CPU insertion torture: Fix typo suppressing CPU-hotplug statistics rcu: Remove orphan/adopt event-tracing fields rcu: Check for NOCB CPUs and empty lists earlier in CB migration rcu: Make NOCB CPUs migrate CBs directly from outgoing CPU rcu: Advance outgoing CPU's callbacks before migrating them rcu: Eliminate rcu_state ->orphan_lock rcu: Advance callbacks after migration rcu: Localize rcu_state ->orphan_pend and ->orphan_done rcu: Remove unused RCU list functions rcu: Move callback-list warning to irq-disable region srcu: Provide ordering for CPU not involved in grace period sched: Replace spin_unlock_wait() with lock/unlock pair rcu: Drive TASKS_RCU directly off of PREEMPT rcu: Create reasonable API for do_exit() TASKS_RCU processing rcu: Add TPS() to event-traced strings rcu: Move rcu.h to new trivial-function style rcu: Add event tracing to ->gp_tasks update at GP start rcu: Add TPS() protection for _rcu_barrier_trace strings rcu: Add assertions verifying blocked-tasks list rcu: Add warning to rcu_idle_enter() for irqs enabled rcu: Remove exports from rcu_idle_exit() and rcu_idle_enter() doc: Update RCU documentation doc: Update memory-barriers.txt for read-to-write dependencies doc: Add RCU files to docbook-generation files doc: No longer allowed to use rcu_dereference on non-pointers doc: Set down RCU's scheduling-clock-interrupt needs completion: Replace spin_unlock_wait() with lock/unlock pair exit: Replace spin_unlock_wait() with lock/unlock pair ipc: Replace spin_unlock_wait() with lock/unlock pair drivers/ata: Replace spin_unlock_wait() with lock/unlock pair locking: Remove spin_unlock_wait() generic definitions arch: Remove spin_unlock_wait() arch-specific definitions Merge branches 'doc.2017.08.17a', 'fixes.2017.08.17a', 'hotplug.2017.07.25b', 'misc.2017.08.17a', 'spin_unlock_wait_no.2017.08.17a', 'srcu.2017.07.27c' and 'torture.2017.07.24c' into HEAD Peter Zijlstra (Intel) (1): rcu: Make rcu_idle_enter() rely on callers disabling irqs Tejun Heo (1): sched: Allow migrating kthreads into online but inactive CPUs .../RCU/Design/Requirements/Requirements.html | 130 +++++++++++ Documentation/RCU/checklist.txt | 121 +++++++---- Documentation/RCU/rcu.txt | 9 +- Documentation/RCU/rcu_dereference.txt | 61 ++---- Documentation/RCU/rcubarrier.txt | 5 + Documentation/RCU/torture.txt | 20 +- Documentation/RCU/whatisRCU.txt | 5 +- Documentation/admin-guide/kernel-parameters.txt | 7 +- Documentation/core-api/kernel-api.rst | 49 +++++ Documentation/memory-barriers.txt | 41 ++-- MAINTAINERS | 2 +- arch/alpha/include/asm/spinlock.h | 5 - arch/arc/include/asm/spinlock.h | 5 - arch/arm/include/asm/spinlock.h | 16 -- arch/arm64/include/asm/spinlock.h | 58 +---- arch/arm64/kernel/process.c | 2 + arch/blackfin/include/asm/spinlock.h | 5 - arch/blackfin/kernel/module.c | 39 ++-- arch/hexagon/include/asm/spinlock.h | 5 - arch/ia64/include/asm/spinlock.h | 21 -- arch/m32r/include/asm/spinlock.h | 5 - arch/metag/include/asm/spinlock.h | 5 - arch/mn10300/include/asm/spinlock.h | 5 - arch/parisc/include/asm/spinlock.h | 7 - arch/powerpc/include/asm/spinlock.h | 33 --- arch/s390/include/asm/spinlock.h | 7 - arch/sh/include/asm/spinlock-cas.h | 5 - arch/sh/include/asm/spinlock-llsc.h | 5 - arch/sparc/include/asm/spinlock_32.h | 5 - arch/tile/include/asm/spinlock_32.h | 2 - arch/tile/include/asm/spinlock_64.h | 2 - arch/tile/lib/spinlock_32.c | 23 -- arch/tile/lib/spinlock_64.c | 22 -- arch/xtensa/include/asm/spinlock.h | 5 - drivers/ata/libata-eh.c | 8 +- include/asm-generic/qspinlock.h | 14 -- include/linux/init_task.h | 8 +- include/linux/rcupdate.h | 15 +- include/linux/rcutiny.h | 8 +- include/linux/sched.h | 5 +- include/linux/spinlock.h | 31 --- include/linux/spinlock_up.h | 6 - include/linux/srcutiny.h | 13 ++ include/linux/srcutree.h | 3 +- include/linux/swait.h | 55 +++++ include/trace/events/rcu.h | 7 +- include/uapi/linux/membarrier.h | 23 +- ipc/sem.c | 3 +- kernel/Makefile | 1 - kernel/cpu.c | 1 + kernel/exit.c | 10 +- kernel/locking/qspinlock.c | 117 ---------- kernel/membarrier.c | 70 ------ kernel/rcu/Kconfig | 3 +- kernel/rcu/rcu.h | 128 ++--------- kernel/rcu/rcu_segcblist.c | 108 +++------- kernel/rcu/rcu_segcblist.h | 28 +-- kernel/rcu/rcuperf.c | 17 +- kernel/rcu/rcutorture.c | 83 +++---- kernel/rcu/srcutiny.c | 8 + kernel/rcu/srcutree.c | 50 ++++- kernel/rcu/tiny.c | 2 - kernel/rcu/tiny_plugin.h | 47 ---- kernel/rcu/tree.c | 213 ++++++++---------- kernel/rcu/tree.h | 15 +- kernel/rcu/tree_exp.h | 2 +- kernel/rcu/tree_plugin.h | 238 ++++++++++++--------- kernel/rcu/update.c | 18 +- kernel/sched/Makefile | 1 + kernel/sched/completion.c | 11 +- kernel/sched/core.c | 38 +++- kernel/sched/membarrier.c | 152 +++++++++++++ kernel/task_work.c | 8 +- kernel/torture.c | 2 +- net/netfilter/nf_conntrack_core.c | 52 +++-- .../selftests/rcutorture/bin/config_override.sh | 61 ++++++ .../testing/selftests/rcutorture/bin/functions.sh | 27 ++- .../testing/selftests/rcutorture/bin/kvm-build.sh | 11 +- .../selftests/rcutorture/bin/kvm-test-1-run.sh | 58 ++--- tools/testing/selftests/rcutorture/bin/kvm.sh | 34 ++- .../selftests/rcutorture/configs/rcu/BUSTED.boot | 2 +- .../selftests/rcutorture/configs/rcu/SRCU-C.boot | 1 - .../selftests/rcutorture/configs/rcu/SRCU-u | 3 +- .../selftests/rcutorture/configs/rcu/TREE01.boot | 2 +- .../selftests/rcutorture/doc/TREE_RCU-kconfig.txt | 2 +- 85 files changed, 1237 insertions(+), 1323 deletions(-) delete mode 100644 kernel/membarrier.c delete mode 100644 kernel/rcu/tiny_plugin.h create mode 100644 kernel/sched/membarrier.c create mode 100755 tools/testing/selftests/rcutorture/bin/config_override.sh delete mode 100644 tools/testing/selftests/rcutorture/configs/rcu/SRCU-C.boot
