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Date: Fri, 10 May 2024 20:30:49 +0200
From: "Uladzislau Rezki (Sony)" <urezki@...il.com>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: RCU <rcu@...r.kernel.org>,
LKML <linux-kernel@...r.kernel.org>,
"Paul E . McKenney" <paulmck@...nel.org>,
Ingo Molnar <mingo@...nel.org>,
Thomas Gleixner <tglx@...utronix.de>,
Johannes Berg <johannes.berg@...el.com>,
Nikita Kiryushin <kiryushin@...ud.ru>,
linke li <lilinke99@...com>,
Zqiang <qiang.zhang1211@...il.com>,
Zenghui Yu <zenghui.yu@...ux.dev>,
Neeraj upadhyay <Neeraj.Upadhyay@....com>,
Boqun Feng <boqun.feng@...il.com>,
Joel Fernandes <joel@...lfernandes.org>,
Frederic Weisbecker <frederic@...nel.org>,
Uladzislau Rezki <urezki@...il.com>,
Oleksiy Avramchenko <oleksiy.avramchenko@...y.com>
Subject: [GIT PULL] RCU changes for v6.10
Hi Linus,
Please pull the latest RCU git tree from:
https://github.com/urezki/linux.git tags/rcu.next.v6.10
# HEAD: 64619b283bb35b12a96129e82b40304f7e5551b7:
Merge branches 'fixes.2024.04.15a', 'misc.2024.04.12a', 'rcu-sync-normal-improve.2024.04.15a', 'rcu-tasks.2024.04.15a' and 'rcutorture.2024.04.15a' into rcu-merge.2024.04.15a
fixes.2024.04.15a: RCU fixes
misc.2024.04.12a: Miscellaneous fixes
rcu-sync-normal-improve.2024.04.15a: Improving synchronize_rcu() call
rcu-tasks.2024.04.15a: Tasks RCU updates
rcutorture.2024.04.15a: Torture-test updates
One merge conflicts was detected by linux-next:
* https://lore.kernel.org/linux-kernel/20240424134551.44531979@canb.auug.org.au/
The conflict resolution from linux-next look good to me, plus I make
my own resolutions at branch merge/rcu.2024.04.30a for your reference.
----------------------------------------------------------------
RCU pull request for v6.10
This pull request contains the following branches:
fixes.2024.04.15a: Fix a lockdep complain for lazy-preemptible kernel,
remove redundant BH disable for TINY_RCU, remove redundant READ_ONCE()
in tree.c, fix false positives KCSAN splat and fix buffer overflow in
the print_cpu_stall_info().
misc.2024.04.12a: Misc updates related to bpf, tracing and update the
MAINTAINERS file.
rcu-sync-normal-improve.2024.04.15a: An improvement of a normal
synchronize_rcu() call in terms of latency. It maintains a separate
track for sync. users only. This approach bypasses per-cpu nocb-lists
thus sync-users do not depend on nocb-list length and how fast regular
callbacks are processed. This is controlled by a default-off runtime
option. See /sys/module/rcutree/parameters/rcu_normal_wake_from_gp
parameter.
rcu-tasks.2024.04.15a: RCU tasks, switch tasks RCU grace periods to
sleep at TASK_IDLE priority, fix some comments, add some diagnostic
warning to the exit_tasks_rcu_start() and fix a buffer overflow in
the show_rcu_tasks_trace_gp_kthread().
rcutorture.2024.04.15a: Functionality improvement for better usability
and information of the tests, bug fixes, code cleanup and documention
update.
----------------------------------------------------------------
Johannes Berg (1):
rcu: Mollify sparse with RCU guard
Neeraj Upadhyay (1):
MAINTAINERS: Update Neeraj's email address
Nikita Kiryushin (2):
rcu-tasks: Fix show_rcu_tasks_trace_gp_kthread buffer overflow
rcu: Fix buffer overflow in print_cpu_stall_info()
Paul E. McKenney (29):
scftorture: Increase memory provided to guest OS
rcutorture: Disable tracing to permit Tasks Rude RCU testing
rcu: Add lockdep checks and kernel-doc header to rcu_softirq_qs()
rcutorture: Enable RCU priority boosting for TREE09
rcutorture: Dump # online CPUs on insufficient cb-flood laundering
rcutorture: Dump GP kthread state on insufficient cb-flood laundering
rcutorture: ASSERT_EXCLUSIVE_WRITER() for ->rtort_pipe_count updates
rcu-tasks: Make Tasks RCU wait idly for grace-period delays
bpf: Select new NEED_TASKS_RCU Kconfig option
arch: Select new NEED_TASKS_RCU Kconfig option
tracing: Select new NEED_TASKS_RCU Kconfig option
bpf: Choose RCU Tasks based on TASKS_RCU rather than PREEMPTION
ftrace: Choose RCU Tasks based on TASKS_RCU rather than PREEMPTION
rcu: Make TINY_RCU depend on !PREEMPT_RCU rather than !PREEMPTION
srcu: Make Tiny SRCU explicitly disable preemption
rcu: Create NEED_TASKS_RCU to factor out enablement logic
rcu: Remove redundant BH disabling in TINY_RCU
rcu: Make Tiny RCU explicitly disable preemption
rcu: Remove redundant READ_ONCE() of rcu_state.gp_flags in tree.c
rcu: Bring diagnostic read of rcu_state.gp_flags into alignment
rcu: Mark writes to rcu_sync ->gp_count field
rcu: Mark loads from rcu_state.n_online_cpus
rcu: Make hotplug operations track GP state, not flags
rcu: Inform KCSAN of one-byte cmpxchg() in rcu_trc_cmpxchg_need_qs()
rcu: Remove redundant CONFIG_PROVE_RCU #if condition
rcu-tasks: Replace exit_tasks_rcu_start() initialization with
WARN_ON_ONCE()
rcutorture: Remove extraneous rcu_torture_pipe_update_one()
READ_ONCE()
rcutorture: Fix rcu_torture_one_read() pipe_count overflow comment
torture: Scale --do-kvfree test time
Uladzislau Rezki (Sony) (6):
rcu: Add data structures for synchronize_rcu()
rcu: Update lockdep while in RCU read-side critical section
rcu: Reduce synchronize_rcu() latency
rcu: Add a trace event for synchronize_rcu_normal()
rcu: Support direct wake-up of synchronize_rcu() users
rcu: Allocate WQ with WQ_MEM_RECLAIM bit set
Zenghui Yu (1):
doc: Remove references to arrayRCU.rst
Zqiang (7):
rcu-tasks: Fix the comments for tasks_rcu_exit_srcu_stall_timer
rcutorture: Use the gp_kthread_dbg operation specified by cur_ops
rcutorture: Make rcutorture support print rcu-tasks gp state
rcutorture: Removing redundant function pointer initialization
rcutorture: Make stall-tasks directly exit when rcutorture tests end
rcutorture: Fix invalid context warning when enable srcu barrier
testing
rcutorture: Use rcu_gp_slow_register/unregister() only for rcutype
test
linke li (1):
rcutorture: Re-use value stored to ->rtort_pipe_count instead of
re-reading
.mailmap | 3 -
Documentation/RCU/whatisRCU.rst | 6 +-
Documentation/admin-guide/kernel-parameters.txt | 14 ++++
MAINTAINERS | 2
arch/Kconfig | 4 -
include/linux/rcupdate.h | 2
include/linux/rcupdate_wait.h | 18 +++---
include/linux/srcutiny.h | 2
include/trace/events/rcu.h | 27 +++++++++
kernel/bpf/Kconfig | 2
kernel/bpf/trampoline.c | 2
kernel/rcu/Kconfig | 2
kernel/rcu/rcu.h | 20 +++---
kernel/rcu/rcutorture.c | 4 -
kernel/rcu/srcutiny.c | 31 ++++++++--
kernel/rcu/srcutree.c | 5 -
kernel/rcu/sync.c | 8 ++
kernel/rcu/tasks.h | 6 +-
kernel/rcu/tiny.c | 2
kernel/rcu/tree.c | 28 +++++++++
kernel/rcu/tree.h | 14 ++++
kernel/rcu/tree_exp.h | 2
kernel/rcu/tree_plugin.h | 4 -
kernel/rcu/tree_stall.h | 2
kernel/rcu/update.c | 4 -
kernel/trace/Kconfig | 4 -
kernel/trace/ftrace.c | 3 -
tools/testing/selftests/rcutorture/bin/torture.sh | 2
tools/testing/selftests/rcutorture/configs/rcu/TREE09 | 5 +
include/linux/rcupdate.h | 20 +++++-
kernel/rcu/Kconfig | 6 +-
kernel/rcu/rcutorture.c | 81 +++++++++++++++------------
kernel/rcu/tasks.h | 38 +++++++++++-
kernel/rcu/tiny.c | 2
kernel/rcu/tree.c | 408 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++----------
kernel/rcu/tree.h | 10 ++-
kernel/rcu/tree_stall.h | 9 ++-
tools/testing/selftests/rcutorture/bin/torture.sh | 4 -
38 files changed, 666 insertions(+), 140 deletions(-)
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