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Date: Sun, 25 Jun 2023 08:35:40 -0700
From: "Paul E. McKenney" <paulmck@...nel.org>
To: torvalds@...ux-foundation.org
Cc: linux-kernel@...r.kernel.org, kernel-team@...a.com,
mingo@...nel.org, tglx@...utronix.de, rcu@...r.kernel.org
Subject: [GIT PULL] RCU changes for v6.5
Hello, Linus,
Once the merge window opens, please pull the latest RCU git tree from:
git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git tags/rcu.2023.06.22a
# HEAD: 2e31da752c6d0e892f2a9232e18da816d04ee691: Merge branches 'doc.2023.05.10a', 'fixes.2023.05.11a', 'kvfree.2023.05.10a', 'nocb.2023.05.11a', 'rcu-tasks.2023.05.10a', 'torture.2023.05.15a' and 'rcu-urgent.2023.06.06a' into HEAD (2023-06-07 13:44:06 -0700)
----------------------------------------------------------------
RCU pull request for v6.5
This pull contains the following branches:
doc.2023.05.10a: Documentation updates
fixes.2023.05.11a: Miscellaneous fixes, perhaps most notably:
o Remove RCU_NONIDLE(). The new visibility of most of the idle
loop to RCU has obsoleted this API.
o Make the RCU_SOFTIRQ callback-invocation time limit also apply
to the rcuc kthreads that invoke callbacks for CONFIG_PREEMPT_RT.
o Add a jiffies-based callback-invocation time limit to handle
long-running callbacks. (The local_clock() function is only
invoked once per 32 callbacks due to its high overhead.)
o Stop rcu_tasks_invoke_cbs() from using never-onlined CPUs,
which fixes a bug that can occur on systems with non-contiguous
CPU numbering.
kvfree.2023.05.10a: kvfree_rcu updates
o Eliminate the single-argument variant of k[v]free_rcu() now
that all uses have been converted to k[v]free_rcu_mightsleep().
o Add WARN_ON_ONCE() checks for k[v]free_rcu*() freeing callbacks
too soon. Yes, this is closing the barn door after the horse
has escaped, but Murphy says that there will be more horses.
nocb.2023.05.11a: Callback-offloading updates
o Fix a number of bugs involving the shrinker and lazy callbacks.
rcu-tasks.2023.05.10a: Tasks RCU updates
torture.2023.05.15a: Torture-test updates
rcu-urgent.2023.06.06a: Urgent SRCU fix (already pulled)
----------------------------------------------------------------
Chen-Yu Tsai (1):
notifier: Initialize new struct srcu_usage field
Frederic Weisbecker (4):
rcu/nocb: Protect lazy shrinker against concurrent (de-)offloading
rcu/nocb: Fix shrinker race against callback enqueuer
rcu/nocb: Recheck lazy callbacks under the ->nocb_lock from shrinker
rcu/nocb: Make shrinker iterate only over NOCB CPUs
Paul E. McKenney (14):
doc: Get rcutree module parameters back into alpha order
doc: Document the rcutree.rcu_resched_ns module parameter
srcu: Remove extraneous parentheses from srcu_read_lock() etc.
rcu/kvfree: Add debug to check grace periods
rcu: Add more RCU files to kernel-api.rst
rcu: Check callback-invocation time limit for rcuc kthreads
rcu: Employ jiffies-based backstop to callback time limit
rcu: Mark additional concurrent load from ->cpu_no_qs.b.exp
rcu: Mark rcu_cpu_kthread() accesses to ->rcu_cpu_has_work
rcu: Make rcu_cpu_starting() rely on interrupts being disabled
rcu-tasks: Stop rcu_tasks_invoke_cbs() from using never-onlined CPUs
locktorture: Add long_hold to adjust lock-hold delays
rcutorture: Correct name of use_softirq module parameter
Merge branches 'doc.2023.05.10a', 'fixes.2023.05.11a', 'kvfree.2023.05.10a', 'nocb.2023.05.11a', 'rcu-tasks.2023.05.10a', 'torture.2023.05.15a' and 'rcu-urgent.2023.06.06a' into HEAD
Peter Zijlstra (1):
rcu: Remove RCU_NONIDLE()
Qiuxu Zhuo (2):
rcu/rcuscale: Move rcu_scale_*() after kfree_scale_cleanup()
rcu/rcuscale: Stop kfree_scale_thread thread(s) after unloading rcuscale
Shigeru Yoshida (1):
rcu-tasks: Avoid pr_info() with spin lock in cblist_init_generic()
Uladzislau Rezki (Sony) (3):
rcu/kvfree: Eliminate k[v]free_rcu() single argument macro
rcu/kvfree: Add debug check for GP complete for kfree_rcu_cpu list
rcu/kvfree: Do not run a page work if a cache is disabled
Zhouyi Zhou (1):
torture: Remove duplicated argument -enable-kvm for ppc64
Zqiang (7):
MAINTAINERS: Update qiang1.zhang@...el.com to qiang.zhang1211@...il.com
rcu/kvfree: Invoke debug_rcu_bhead_unqueue() after checking bnode->gp_snap
rcu/kvfree: Use consistent krcp when growing kfree_rcu() page cache
rcu/kvfree: Make fill page cache start from krcp->nr_bkv_objs
rcu/kvfree: Make drain_page_cache() take early return if cache is disabled
rcu-tasks: Clarify the cblist_init_generic() function's pr_info() output
doc/rcutorture: Add description of rcutorture.stall_cpu_block
.../RCU/Design/Requirements/Requirements.rst | 36 +---
Documentation/RCU/whatisRCU.rst | 1 -
Documentation/admin-guide/kernel-parameters.txt | 140 ++++++++-------
Documentation/core-api/kernel-api.rst | 12 ++
MAINTAINERS | 2 +-
include/linux/notifier.h | 10 ++
include/linux/rcupdate.h | 54 +-----
include/linux/srcu.h | 8 +-
kernel/locking/locktorture.c | 51 +++---
kernel/rcu/Kconfig | 18 ++
kernel/rcu/rcu.h | 6 +
kernel/rcu/rcuscale.c | 199 +++++++++++----------
kernel/rcu/tasks.h | 12 +-
kernel/rcu/tree.c | 131 +++++++++-----
kernel/rcu/tree_exp.h | 2 +-
kernel/rcu/tree_nocb.h | 52 +++++-
kernel/rcu/tree_plugin.h | 4 +-
.../testing/selftests/rcutorture/bin/functions.sh | 2 +-
.../rcutorture/configs/rcu/BUSTED-BOOST.boot | 2 +-
.../selftests/rcutorture/configs/rcu/TREE03.boot | 2 +-
20 files changed, 412 insertions(+), 332 deletions(-)
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