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Message-ID: <20210217110229.GA21245@gmail.com>
Date: Wed, 17 Feb 2021 12:02:29 +0100
From: Ingo Molnar <mingo@...nel.org>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org,
"Paul E. McKenney" <paulmck@...nel.org>,
Thomas Gleixner <tglx@...utronix.de>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Andrew Morton <akpm@...ux-foundation.org>,
Josh Triplett <josh@...htriplett.org>
Subject: [GIT PULL] RCU updates for v5.12
Linus,
Please pull the latest core/rcu git tree from:
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git core-rcu-2021-02-17
# HEAD: 2b392cb11c0db645ba81a08b6a2e96c56ec1fc64 Merge branch 'for-mingo-nolibc' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu
These are the latest RCU updates for v5.12:
- Documentation updates.
- Miscellaneous fixes.
- kfree_rcu() updates: Addition of mem_dump_obj() to provide allocator return
addresses to more easily locate bugs. This has a couple of RCU-related commits,
but is mostly MM. Was pulled in with akpm's agreement.
- Per-callback-batch tracking of numbers of callbacks,
which enables better debugging information and smarter
reactions to large numbers of callbacks.
- The first round of changes to allow CPUs to be runtime switched from and to
callback-offloaded state.
- CONFIG_PREEMPT_RT-related changes.
- RCU CPU stall warning updates.
- Addition of polling grace-period APIs for SRCU.
- Torture-test and torture-test scripting updates, including a "torture everything"
script that runs rcutorture, locktorture, scftorture, rcuscale, and refscale.
Plus does an allmodconfig build.
- nolibc fixes for the torture tests
Thanks,
Ingo
------------------>
Frederic Weisbecker (17):
tools/rcutorture: Make identify_qemu_vcpus() independent of local language
rcu/nocb: Turn enabled/offload states into a common flag
rcu/nocb: Provide basic callback offloading state machine bits
rcu/nocb: Always init segcblist on CPU up
rcu/nocb: De-offloading CB kthread
rcu/nocb: Don't deoffload an offline CPU with pending work
rcu/nocb: De-offloading GP kthread
rcu/nocb: Re-offload support
rcu/nocb: Shutdown nocb timer on de-offloading
rcu/nocb: Flush bypass before setting SEGCBLIST_SOFTIRQ_ONLY
rcu/nocb: Set SEGCBLIST_SOFTIRQ_ONLY at the very last stage of de-offloading
rcu/nocb: Only cond_resched() from actual offloaded batch processing
rcu/nocb: Process batch locally as long as offloading isn't complete
rcu/nocb: Locally accelerate callbacks as long as offloading isn't complete
cpu/hotplug: Add lockdep_is_cpus_held()
timer: Add timer_curr_running()
tools/rcutorture: Support nocb toggle in TREE01
Joel Fernandes (Google) (6):
rcu/tree: Make rcu_do_batch count how many callbacks were executed
rcu/segcblist: Add additional comments to explain smp_mb()
rcu/segcblist: Add counters to segcblist datastructure
rcu/tree: segcblist: Remove redundant smp_mb()s
rcu/trace: Add tracing for how segcb list changes
rcu/segcblist: Add debug checks for segment lengths
Julia Cartwright (1):
rcu: Enable rcu_normal_after_boot unconditionally for RT
Mauro Carvalho Chehab (1):
list: Fix a typo at the kernel-doc markup
Neeraj Upadhyay (1):
rcu: Check and report missed fqs timer wakeup on RCU stall
Paul E. McKenney (83):
docs: Remove redundant "``" from Requirements.rst
doc: Remove obsolete RCU-bh and RCU-sched update-side API members
doc: Update RCU requirements RCU_INIT_POINTER() description
doc: Remove obsolete rcutree.rcu_idle_lazy_gp_delay boot parameter
srcu: Make Tiny SRCU use multi-bit grace-period counter
srcu: Provide internal interface to start a Tiny SRCU grace period
srcu: Provide internal interface to start a Tree SRCU grace period
srcu: Provide polling interfaces for Tiny SRCU grace periods
srcu: Provide polling interfaces for Tree SRCU grace periods
srcu: Document polling interfaces for Tree SRCU grace periods
srcu: Add comment explaining cookie overflow/wrap
rcutorture: Prepare for ->start_gp_poll and ->poll_gp_state
rcutorture: Add writer-side tests of polling grace-period API
rcutorture: Add reader-side tests of polling grace-period API
rcutorture: Add testing for RCU's global memory ordering
scftorture: Add debug output for wrong-CPU warning
rcu: Mark obtuse portion of stall warning as internal debug
rcu: For RCU grace-period kthread starvation, dump last CPU it ran on
rcu: Do not NMI offline CPUs
torture: Make --kcsan specify lockdep
torture: Make kvm.sh "--dryrun sched" summarize number of batches
torture: Make kvm.sh "--dryrun sched" summarize number of builds
torture: Allow kvm.sh --datestamp to specify subdirectories
torture: Prepare for splitting qemu execution from kvm-test-1-run.sh
torture: Add config2csv.sh script to compare torture scenarios
torture: Make kvm.sh "Test Summary" date be end of test
torture: Make kvm.sh arguments accumulate
torture: Print run duration at end of kvm.sh execution
torture: Make kvm.sh return failure upon build failure
torture: Make kvm.sh include --kconfig arguments in CPU calculation
torture: Add kvm.sh test summary to end of log file
torture: Stop hanging on panic
torture: Add --dryrun batches to help schedule a distributed run
torture: s/STOP/STOP.1/ to avoid scenario collision
torture: Simplify exit-code plumbing for kvm-recheck.sh and kvm-find-errors.sh
torture: Remove "Failed to add ttynull console" false positive
torture: Allow standalone kvm-recheck.sh run detect --trust-make
rcu: Add lockdep_assert_irqs_disabled() to rcu_sched_clock_irq() and callees
rcu: Add lockdep_assert_irqs_disabled() to raw_spin_unlock_rcu_node() macros
rcu: Make TASKS_TRACE_RCU select IRQ_WORK
torture: Do Kconfig analysis only once per scenario
rcutorture: Test runtime toggling of CPUs' callback offloading
rcu/nocb: Add grace period and task state to show_rcu_nocb_state() output
rcu/nocb: Add nocb CB kthread list to show_rcu_nocb_state() output
rcu/nocb: Code-style nits in callback-offloading toggling
rcu: Do any deferred nocb wakeups at CPU offline time
torture: Add torture.sh torture-everything script
torture: Make torture.sh use common time-duration bash functions
torture: Remove use of "eval" in torture.sh
torture: Add "make allmodconfig" to torture.sh
torture: Auto-size SCF and scaling runs based on number of CPUs
torture: Enable torture.sh argument checking
torture: Make torture.sh rcuscale and refscale deal with allmodconfig
torture: Make torture.sh refscale runs use verbose_batched module parameter
torture: Create doyesno helper function for torture.sh
torture: Make torture.sh allmodconfig retain and label output
torture: Make torture.sh throttle VERBOSE_TOROUT_*() for refscale
torture: Make torture.sh refuse to do zero-length runs
torture: Drop log.long generation from torture.sh
torture: Allow scenarios to be specified to torture.sh
torture: Add command and results directory to torture.sh log
torture: Add --kcsan-kmake-arg to torture.sh for KCSAN
torture: Compress KASAN vmlinux files
refscale: Allow summarization of verbose output
rcutorture: Require entire stutter period be post-boot
rcutorture: Make synctype[] and nsynctype be static global
rcutorture: Make rcu_torture_fakewriter() use blocking wait primitives
torture: Add fuzzed hrtimer-based sleep functions
rcutorture: Use torture_hrtimeout_jiffies() to avoid busy-waits
torture: Make stutter use torture_hrtimeout_*() functions
rcutorture: Use hrtimers for reader and writer delays
torture: Make refscale throttle high-rate printk()s
torture: Throttle VERBOSE_TOROUT_*() output
rcutorture: Make object_debug also double call_rcu() heap object
torture: Clean up after torture-test CPU hotplugging
torture: Maintain torture-specific set of CPUs-online books
rcutorture: Add rcutree.use_softirq=0 to RUDE01 and TASKS01
mm: Add mem_dump_obj() to print source of memory block
mm: Make mem_dump_obj() handle NULL and zero-sized pointers
mm: Make mem_dump_obj() handle vmalloc() memory
mm: Make mem_obj_dump() vmalloc() dumps include start and length
rcu: Make call_rcu() print mem_dump_obj() info for double-freed callback
percpu_ref: Dump mem_dump_obj() info upon reference-count underflow
Paul Gortmaker (1):
docs: Fix typos and drop/fix dead links in RCU documentation
Peter Zijlstra (1):
sched/core: Allow try_invoke_on_locked_down_task() with irqs disabled
Scott Wood (1):
rcu: Unconditionally use rcuc threads on PREEMPT_RT
Sebastian Andrzej Siewior (3):
rcu: Make RCU_BOOST default on CONFIG_PREEMPT_RT
doc: Update RCU's requirements page about the PREEMPT_RT wiki
doc: Use CONFIG_PREEMPTION
Uladzislau Rezki (Sony) (3):
rcu: Introduce kfree_rcu() single-argument macro
rcu: Eliminate the __kvfree_rcu() macro
rcu-tasks: Add RCU-tasks self tests
Wang Qing (1):
locking: Remove duplicate include of percpu-rwsem.h
Willy Tarreau (10):
tools/nolibc: Add the definition for dup()
tools/nolibc: Make dup2() rely on dup3() when available
tools/nolibc: Make getpgrp() fall back to getpgid(0)
tools/nolibc: Implement fork() based on clone()
tools/nolibc: Implement poll() based on ppoll()
tools/nolibc: Get timeval, timespec and timezone from linux/time.h
tools/nolibc: Remove incorrect definitions of __ARCH_WANT_*
tools/nolibc: Emit detailed error for missing alternate syscall number definitions
tools/nolibc: Fix position of -lgcc in the documented example
tools/rcutorture: Fix position of -lgcc in mkinitrd.sh
Zqiang (1):
rcu: Record kvfree_call_rcu() call stack for KASAN
.../Expedited-Grace-Periods.rst | 4 +-
.../RCU/Design/Requirements/Requirements.rst | 732 +++++++++++----------
Documentation/RCU/checklist.rst | 10 +-
Documentation/RCU/rcubarrier.rst | 6 +-
Documentation/RCU/stallwarn.rst | 27 +-
Documentation/RCU/whatisRCU.rst | 10 +-
Documentation/admin-guide/kernel-parameters.txt | 39 +-
include/linux/cpu.h | 2 +
include/linux/list.h | 2 +-
include/linux/mm.h | 2 +
include/linux/rcu_segcblist.h | 120 +++-
include/linux/rcupdate.h | 42 +-
include/linux/slab.h | 2 +
include/linux/srcu.h | 3 +
include/linux/srcutiny.h | 7 +-
include/linux/timer.h | 2 +
include/linux/torture.h | 27 +-
include/linux/vmalloc.h | 6 +
include/trace/events/rcu.h | 26 +
kernel/cpu.c | 7 +
kernel/locking/locktorture.c | 1 -
kernel/rcu/Kconfig | 5 +-
kernel/rcu/rcu.h | 16 +-
kernel/rcu/rcu_segcblist.c | 216 ++++--
kernel/rcu/rcu_segcblist.h | 57 +-
kernel/rcu/rcutorture.c | 395 +++++++++--
kernel/rcu/refscale.c | 23 +-
kernel/rcu/srcutiny.c | 77 ++-
kernel/rcu/srcutree.c | 147 ++++-
kernel/rcu/tasks.h | 79 +++
kernel/rcu/tree.c | 101 ++-
kernel/rcu/tree.h | 2 +
kernel/rcu/tree_exp.h | 2 +-
kernel/rcu/tree_plugin.h | 367 ++++++++++-
kernel/rcu/tree_stall.h | 60 +-
kernel/rcu/update.c | 4 +-
kernel/scftorture.c | 6 +-
kernel/sched/core.c | 9 +-
kernel/time/timer.c | 14 +
kernel/torture.c | 167 ++++-
lib/percpu-refcount.c | 12 +-
mm/slab.c | 20 +
mm/slab.h | 12 +
mm/slab_common.c | 75 +++
mm/slob.c | 6 +
mm/slub.c | 40 ++
mm/util.c | 31 +
mm/vmalloc.c | 13 +
tools/include/nolibc/nolibc.h | 153 +++--
.../testing/selftests/rcutorture/bin/config2csv.sh | 67 ++
.../selftests/rcutorture/bin/console-badness.sh | 1 +
.../testing/selftests/rcutorture/bin/functions.sh | 36 +-
.../selftests/rcutorture/bin/kvm-find-errors.sh | 9 +-
.../selftests/rcutorture/bin/kvm-recheck.sh | 3 +-
.../selftests/rcutorture/bin/kvm-test-1-run.sh | 12 +-
tools/testing/selftests/rcutorture/bin/kvm.sh | 103 ++-
tools/testing/selftests/rcutorture/bin/mkinitrd.sh | 2 +-
.../selftests/rcutorture/bin/parse-build.sh | 2 +-
.../selftests/rcutorture/bin/parse-console.sh | 2 +-
tools/testing/selftests/rcutorture/bin/torture.sh | 442 +++++++++++++
.../selftests/rcutorture/configs/rcu/RUDE01.boot | 1 +
.../selftests/rcutorture/configs/rcu/TASKS01.boot | 1 +
.../selftests/rcutorture/configs/rcu/TREE01.boot | 4 +-
63 files changed, 3108 insertions(+), 763 deletions(-)
create mode 100755 tools/testing/selftests/rcutorture/bin/config2csv.sh
create mode 100755 tools/testing/selftests/rcutorture/bin/torture.sh
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