Hello, Ingo, This pull request contains the following changes: 1. An LKMM commit adding support for synchronize_srcu_expedited(). http://lkml.kernel.org/r/20190326234133.24962-8-paulmck@xxxxxxxxxxxxx 2. A couple of straggling RCU flavor consolidation updates. http://lkml.kernel.org/r/20190326230011.GA16275@xxxxxxxxxxxxx 3. Documentation updates. http://lkml.kernel.org/r/20190326230408.GA17069@xxxxxxxxxxxxx 4. Miscellaneous fixes. http://lkml.kernel.org/r/20190326231253.GA18343@xxxxxxxxxxxxx 5. SRCU updates. http://lkml.kernel.org/r/20190326231512.GA19843@xxxxxxxxxxxxx 6. RCU CPU stall-warning updates. http://lkml.kernel.org/r/20190326232208.GA20384@xxxxxxxxxxxxx 7. Torture-test updates. http://lkml.kernel.org/r/20190326233054.GA21523@xxxxxxxxxxxxx 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 91df49e187c1a111e423fe0c3aec3472980385e4: Merge LKMM and RCU commits (2019-04-16 07:08:07 -0700) ---------------------------------------------------------------- Akira Yokosawa (1): rcu: Move common code out of if-else block Alan Stern (4): tools/memory-model: Rename some RCU relations tools/memory-model: Refactor some RCU relations tools/memory-model: Add SRCU support tools/memory-model: Update Documentation/explanation.txt to include SRCU support Andrea Parri (1): tools/memory-model: Avoid duplicating herdtools versions Cyrill Gorcunov (1): rcu: rcu_qs -- Use raise_softirq_irqoff to not save irqs twice Joel Fernandes (Google) (1): rcu: Avoid unnecessary softirq when system is idle Liu Song (1): rcu: Set rcutree.kthread_prio sysfs access to read-only Luc Maranget (1): tools/memory-model: Dynamically check SRCU lock-to-unlock matching Neeraj Upadhyay (5): rcu: Fix self-wakeups for grace-period kthread rcu: Default jiffies_to_sched_qs to jiffies_till_sched_qs rcu: Do a single rhp->func read in rcu_head_after_call_rcu() rcu: Fix nohz status in stall warning rcutorture: Fix expected forward progress duration in OOM notifier Paul E. McKenney (39): tools/memory-model: Update README for addition of SRCU doc: Remove obsolete RCU update functions from RCU documentation doc: Describe choice of rcu_dereference() APIs and __rcu usage doc: Fix typos and otherwise modernize checklist.txt rcu: Unconditionally expedite during suspend/hibernate rcu: Make exit_rcu() handle non-preempted RCU readers MAINTAINERS: RCU now has its own email list MAINTAINERS: Add -rcu branch name ("dev") rcu: Allow rcu_nocbs= to specify all CPUs rcu: Report error for bad rcu_nocbs= parameter values rcu: Update jiffies_to_sched_qs and adjust_jiffies_till_sched_qs() comments rcu: Eliminate redundant NULL-pointer check rcu: Fix typo in tree_exp.h comment rcu: Correct READ_ONCE()/WRITE_ONCE() for ->rcu_read_unlock_special srcu: Check for in-flight callbacks in _cleanup_srcu_struct() srcu: Remove cleanup_srcu_struct_quiesced() rcu: Move RCU CPU stall-warning code out of update.c rcu: Move RCU CPU stall-warning code out of tree_plugin.h rcu: Move RCU CPU stall-warning code out of tree.c rcu: Inline RCU task stall-warning helper functions rcu: Move rcu_print_task_exp_stall() to tree_exp.h rcu: Inline RCU stall-warning info helper functions rcu: Move FAST_NO_HZ stall-warning code to tree_stall.h rcu: Organize functions in tree_stall.h rcu: Move irq-disabled stall-warning checking to tree_stall.h rcu: Move forward-progress checkers into tree_stall.h torture: Don't try to offline the last CPU tools/.../rcutorture: Convert to SPDX license identifier rcutorture: Make rcutorture_extend_mask() comment match the code rcutorture: Remove ->ext_irq_conflict field rcutorture: Fix cleanup path for invalid torture_type strings rcuperf: Fix cleanup path for invalid perf_type strings locktorture: NULL cxt.lwsa and cxt.lrsa to allow bad-arg detection torture: Suppress false-positive CONFIG_INITRAMFS_SOURCE complaint doc/kprobes: Update obsolete RCU update functions tools/memory-model: Add support for synchronize_srcu_expedited() net/ipv4/netfilter: Update comment from call_rcu_bh() to call_rcu() Merge branches 'consolidate.2019.04.09a', 'doc.2019.03.26b', 'fixes.2019.03.26b', 'srcu.2019.03.26b', 'stall.2019.03.26b' and 'torture.2019.03.26b' into HEAD Merge LKMM and RCU commits Peter Zijlstra (1): Documentation/atomic_t: Clarify signed vs unsigned SeongJae Park (2): sched/Documentation/kokr: Update Korean translation to update wake_up() & co. memory-barrier guarantees locking/memory-barriers/kokr: Update Korean translation to replace smp_cond_acquire() with smp_cond_load_acquire() Tycho Andersen (1): doc: Repair some whitespace damage Zhouyi Zhou (1): rcu: Fix force_qs_rnp() header comment .../Design/Data-Structures/Data-Structures.html | 3 +- .../Expedited-Grace-Periods.html | 4 +- .../Memory-Ordering/Tree-RCU-Memory-Ordering.html | 5 +- Documentation/RCU/NMI-RCU.txt | 13 +- Documentation/RCU/UP.txt | 6 +- Documentation/RCU/checklist.txt | 91 ++- Documentation/RCU/rcu.txt | 8 +- Documentation/RCU/rcu_dereference.txt | 103 +++ Documentation/RCU/rcubarrier.txt | 27 +- Documentation/RCU/whatisRCU.txt | 10 +- Documentation/admin-guide/kernel-parameters.txt | 4 +- Documentation/atomic_t.txt | 17 + Documentation/kprobes.txt | 6 +- .../translations/ko_KR/memory-barriers.txt | 49 +- MAINTAINERS | 16 +- drivers/nvme/host/core.c | 2 +- include/linux/rcupdate.h | 6 +- include/linux/srcu.h | 36 +- kernel/locking/locktorture.c | 2 + kernel/rcu/rcu.h | 1 + kernel/rcu/rcuperf.c | 5 + kernel/rcu/rcutorture.c | 21 +- kernel/rcu/srcutiny.c | 9 +- kernel/rcu/srcutree.c | 32 +- kernel/rcu/tiny.c | 2 +- kernel/rcu/tree.c | 508 +-------------- kernel/rcu/tree.h | 14 +- kernel/rcu/tree_exp.h | 36 +- kernel/rcu/tree_plugin.h | 257 +------- kernel/rcu/tree_stall.h | 709 +++++++++++++++++++++ kernel/rcu/update.c | 59 +- kernel/torture.c | 2 + net/ipv4/netfilter/ipt_CLUSTERIP.c | 2 +- tools/memory-model/Documentation/explanation.txt | 289 +++++---- tools/memory-model/README | 33 +- tools/memory-model/linux-kernel.bell | 35 +- tools/memory-model/linux-kernel.cat | 39 +- tools/memory-model/linux-kernel.def | 6 + tools/memory-model/lock.cat | 3 - .../selftests/rcutorture/bin/configNR_CPUS.sh | 17 +- .../selftests/rcutorture/bin/config_override.sh | 17 +- .../selftests/rcutorture/bin/configcheck.sh | 19 +- .../testing/selftests/rcutorture/bin/configinit.sh | 17 +- tools/testing/selftests/rcutorture/bin/cpus2use.sh | 17 +- .../testing/selftests/rcutorture/bin/functions.sh | 17 +- tools/testing/selftests/rcutorture/bin/jitter.sh | 17 +- .../testing/selftests/rcutorture/bin/kvm-build.sh | 17 +- .../selftests/rcutorture/bin/kvm-find-errors.sh | 5 + .../selftests/rcutorture/bin/kvm-recheck-lock.sh | 17 +- .../selftests/rcutorture/bin/kvm-recheck-rcu.sh | 17 +- .../rcutorture/bin/kvm-recheck-rcuperf-ftrace.sh | 17 +- .../rcutorture/bin/kvm-recheck-rcuperf.sh | 17 +- .../selftests/rcutorture/bin/kvm-recheck.sh | 17 +- .../selftests/rcutorture/bin/kvm-test-1-run.sh | 17 +- tools/testing/selftests/rcutorture/bin/kvm.sh | 17 +- tools/testing/selftests/rcutorture/bin/mkinitrd.sh | 15 +- .../selftests/rcutorture/bin/parse-build.sh | 17 +- .../selftests/rcutorture/bin/parse-console.sh | 17 +- .../rcutorture/configs/lock/ver_functions.sh | 17 +- .../rcutorture/configs/rcu/ver_functions.sh | 17 +- .../rcutorture/configs/rcuperf/ver_functions.sh | 17 +- 61 files changed, 1374 insertions(+), 1458 deletions(-) create mode 100644 kernel/rcu/tree_stall.h