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Message-ID: <20220314154857.GA2637810@paulmck-ThinkPad-P17-Gen-1>
Date: Mon, 14 Mar 2022 08:48:57 -0700
From: "Paul E. McKenney" <paulmck@...nel.org>
To: torvalds@...ux-foundation.org
Cc: mingo@...nel.org, linux-kernel@...r.kernel.org, tglx@...utronix.de,
rcu@...r.kernel.org, kernel-team@...com
Subject: Re: [GIT PULL] RCU changes for v5.18
On Sun, Mar 13, 2022 at 08:28:23PM -0700, Paul E. McKenney wrote:
> Hello, Linus,
>
> Please pull the latest RCU git tree from:
OK, I was apparently unable to distinguish v5.17-rc8 from v5.18 yesterday
evening. :-/
I will resent both pull requests next week, and please accept my apologies
for the bother.
Thanx, Paul
> The following changes since commit da123016ca8cb5697366c0b2dd55059b976e67e4:
>
> rcu-tasks: Fix computation of CPU-to-list shift counts (2022-01-26 13:04:05 -0800) tags/rcu-urgent.2022.01.26a
>
> are available in the Git repository at:
>
> git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git tags/rcu.2022.03.13a
>
> # HEAD: d5578190bed3d110203e3b6b29c5a7a39d51c6c0 Merge branches 'exp.2022.02.24a', 'fixes.2022.02.14a', 'rcu_barrier.2022.02.08a', 'rcu-tasks.2022.02.08a', 'rt.2022.02.01b', 'torture.2022.02.01b' and 'torturescript.2022.02.08a' into HEAD (2022-02-24 09:38:46 -0800)
>
> RCU changes for this cycle were:
>
> exp.2022.02.24a: Contains a fix for idle detection from Neeraj Upadhyay
> and missing access marking detected by KCSAN.
>
> fixes.2022.02.14a: Miscellaneous fixes.
>
> rcu_barrier.2022.02.08a: Reduces coupling between rcu_barrier() and
> CPU-hotplug operations, so that rcu_barrier() no longer needs
> to do cpus_read_lock(). This may also someday allow system
> boot to bring CPUs online concurrently.
>
> rcu-tasks.2022.02.08a: Enable more aggressive movement to per-CPU
> queueing when reacting to excessive lock contention due
> to workloads placing heavy update-side stress on RCU tasks.
>
> rt.2022.02.01b: Improvements to RCU priority boosting, including
> changes from Neeraj Upadhyay, Zqiang, and Alison Chaiken.
>
> torture.2022.02.01b: Various fixes improving test robustness and
> debug information.
>
> torturescript.2022.02.08a: Add tests for SRCU size transitions, further
> compress torture.sh build products, and improve debug output.
>
> ----------------------------------------------------------------
> Alison Chaiken (4):
> rcu: Move kthread_prio bounds-check to a separate function
> rcu: Make priority of grace-period thread consistent
> rcu: Elevate priority of offloaded callback threads
> rcu: Update documentation regarding kthread_prio cmdline parameter
>
> David Woodhouse (2):
> rcu: Kill rnp->ofl_seq and use only rcu_state.ofl_lock for exclusion
> rcu: Add mutex for rcu boost kthread spawning and affinity setting
>
> Ingo Molnar (2):
> rcu: Uninline multi-use function: finish_rcuwait()
> rcu: Remove __read_mostly annotations from rcu_scheduler_active externs
>
> Neeraj Upadhyay (3):
> rcu/exp: Fix check for idle context in rcu_exp_handler
> rcu/nocb: Handle concurrent nocb kthreads creation
> rcu: Remove unused rcu_state.boost
>
> Paul E. McKenney (34):
> rcu: Mark ->expmask access in synchronize_rcu_expedited_wait()
> rcu: Mark accesses to boost_starttime
> rcu: Don't deboost before reporting expedited quiescent state
> rcutorture: Print message before invoking ->cb_barrier()
> torture: Distinguish kthread stopping and being asked to stop
> rcutorture: Increase visibility of forward-progress hangs
> rcutorture: Make rcu_fwd_cb_nodelay be a counter
> rcutorture: Add end-of-test check to rcu_torture_fwd_prog() loop
> rcutorture: Fix rcu_fwd_mutex deadlock
> torture: Wake up kthreads after storing task_struct pointer
> rcutorture: Enable limited callback-flooding tests of SRCU
> torture: Drop trailing ^M from console output
> torture: Allow four-digit repetition numbers for --configs parameter
> torture: Output per-failed-run summary lines from torture.sh
> torture: Make kvm.sh summaries note runs having only KCSAN reports
> torture: Indicate which torture.sh runs' bugs are all KCSAN reports
> torture: Compress KCSAN as well as KASAN vmlinux files
> torture: Make kvm-remote.sh try multiple times to download tarball
> torture: Print only one summary line per run
> torture: Make kvm-find-errors.sh notice missing vmlinux file
> torture: Change KVM environment variable to RCUTORTURE
> rcu: Refactor rcu_barrier() empty-list handling
> rcu: Rework rcu_barrier() and callback-migration logic
> rcu: Make rcu_barrier() no longer block CPU-hotplug operations
> rcu: Create and use an rcu_rdp_cpu_online()
> rcu-tasks: Use order_base_2() instead of ilog2()
> rcu-tasks: Set ->percpu_enqueue_shift to zero upon contention
> torture: Make torture.sh help message match reality
> rcutorture: Test SRCU size transitions
> rcutorture: Provide non-power-of-two Tasks RCU scenarios
> MAINTAINERS: Add Frederic and Neeraj to their RCU files
> rcu: Inline __call_rcu() into call_rcu()
> rcu: Mark writes to the rcu_segcblist structure's ->flags field
> Merge branches 'exp.2022.02.24a', 'fixes.2022.02.14a', 'rcu_barrier.2022.02.08a', 'rcu-tasks.2022.02.08a', 'rt.2022.02.01b', 'torture.2022.02.01b' and 'torturescript.2022.02.08a' into HEAD
>
> Uladzislau Rezki (Sony) (1):
> rcu: Fix description of kvfree_rcu()
>
> Yury Norov (1):
> rcu: Replace cpumask_weight with cpumask_empty where appropriate
>
> Zqiang (3):
> rcu: Create per-cpu rcuc kthreads only when rcutree.use_softirq=0
> rcu: Add per-CPU rcuc task dumps to RCU CPU stall warnings
> kasan: Record work creation stack trace with interrupts enabled
>
> Documentation/admin-guide/kernel-parameters.txt | 2 +
> MAINTAINERS | 2 +
> include/linux/rcupdate.h | 4 +-
> include/linux/rcutree.h | 2 +-
> include/linux/rcuwait.h | 6 +-
> include/trace/events/rcu.h | 9 +-
> kernel/rcu/rcu_segcblist.h | 4 +-
> kernel/rcu/rcutorture.c | 41 ++-
> kernel/rcu/tasks.h | 6 +-
> kernel/rcu/tree.c | 328 ++++++++++++---------
> kernel/rcu/tree.h | 18 +-
> kernel/rcu/tree_exp.h | 5 +-
> kernel/rcu/tree_nocb.h | 18 +-
> kernel/rcu/tree_plugin.h | 31 +-
> kernel/rcu/tree_stall.h | 35 +++
> kernel/rcu/update.c | 7 +
> kernel/torture.c | 6 +-
> .../selftests/rcutorture/bin/console-badness.sh | 2 +-
> .../testing/selftests/rcutorture/bin/kvm-again.sh | 4 +-
> .../selftests/rcutorture/bin/kvm-check-branches.sh | 4 +-
> .../selftests/rcutorture/bin/kvm-end-run-stats.sh | 4 +-
> .../selftests/rcutorture/bin/kvm-find-errors.sh | 6 +
> .../selftests/rcutorture/bin/kvm-recheck-rcu.sh | 2 +-
> .../testing/selftests/rcutorture/bin/kvm-remote.sh | 25 +-
> tools/testing/selftests/rcutorture/bin/kvm.sh | 16 +-
> .../selftests/rcutorture/bin/parse-console.sh | 10 +
> tools/testing/selftests/rcutorture/bin/torture.sh | 38 ++-
> .../selftests/rcutorture/configs/rcu/RUDE01 | 2 +-
> .../selftests/rcutorture/configs/rcu/SRCU-N.boot | 1 +
> .../selftests/rcutorture/configs/rcu/SRCU-P.boot | 2 +
> .../selftests/rcutorture/configs/rcu/TRACE01 | 2 +-
> 31 files changed, 400 insertions(+), 242 deletions(-)
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