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Message-ID: <20210428071032.GA84588@gmail.com>
Date:   Wed, 28 Apr 2021 09:10:32 +0200
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 changes for v5.13

Linus,

Please pull the latest core/rcu git tree from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git core-rcu-2021-04-28

   # HEAD: 120b566d1df22a0a4543ac0e8aef875c49dd2c21 Merge branch 'for-mingo-rcu' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu

RCU changes for this cycle were:

 - Bitmap support for "N" as alias for last bit
 - kvfree_rcu updates
 - mm_dump_obj() updates.  (One of these is to mm, but was suggested by Andrew Morton.)
 - RCU callback offloading update
 - Polling RCU grace-period interfaces
 - Realtime-related RCU updates
 - Tasks-RCU updates
 - Torture-test updates
 - Torture-test scripting updates
 - Miscellaneous fixes

 Thanks,

	Ingo

------------------>
Akira Yokosawa (1):
      rculist: Replace reference to atomic_ops.rst

Frederic Weisbecker (11):
      rcu: Remove superfluous rdp fetch
      rcu/nocb: Detect unsafe checks for offloaded rdp
      rcu/nocb: Comment the reason behind BH disablement on batch processing
      rcu/nocb: Forbid NOCB toggling on offline CPUs
      rcu/nocb: Avoid confusing double write of rdp->nocb_cb_sleep
      rcu/nocb: Only (re-)initialize segcblist when needed on CPU up
      rcu/nocb: Rename nocb_gp_update_state to nocb_gp_update_state_deoffloading
      rcu/nocb: Fix missed nocb_timer requeue
      rcu/nocb: Disable bypass when CPU isn't completely offloaded
      rcu/nocb: Remove stale comment above rcu_segcblist_offload()
      rcu/nocb: Move trace_rcu_nocb_wake() calls outside nocb_lock when possible

Jiapeng Chong (1):
      rcu: Make nocb_nobypass_lim_per_jiffy static

Lukas Bulwahn (1):
      rcu-tasks: Rectify kernel-doc for struct rcu_tasks

Mauro Carvalho Chehab (1):
      rcu: Fix kfree_rcu() docbook errors

Neeraj Upadhyay (1):
      rcu: Fix CPU-offline trace in rcutree_dying_cpu

Paul E. McKenney (45):
      rcutorture: Use "all" and "N" in "nohz_full" and "rcu_nocbs"
      kvfree_rcu: Use __GFP_NOMEMALLOC for single-argument kvfree_rcu()
      kvfree_rcu: Make krc_this_cpu_unlock() use raw_spin_unlock_irqrestore()
      mm: Don't build mm_dump_obj() on CONFIG_PRINTK=n kernels
      rcutorture: Add crude tests for mem_dump_obj()
      rcu: Expedite deboost in case of deferred quiescent state
      rcutorture: Make TREE03 use real-time tree.use_softirq setting
      rcutorture: Fix testing of RCU priority boosting
      rcu: Make rcu_read_unlock_special() expedite strict grace periods
      torture: Make jitter.sh handle large systems
      rcu-tasks: Add block comment laying out RCU Tasks Trace design
      torturescript: Don't rerun failed rcutorture builds
      torture: Allow 1G of memory for torture.sh kvfree testing
      torture: Provide bare-metal modprobe-based advice
      torture: Improve readability of the testid.txt file
      rcuscale: Disable verbose torture-test output
      refscale: Disable verbose torture-test output
      torture: Move build/run synchronization files into scenario directories
      torture: Use file-based protocol to mark batch's runs complete
      torture: Use "jittering" file to control jitter.sh execution
      torture: Eliminate jitter_pids file
      torture: Reverse jittering and duration parameters for jitter.sh
      softirq: Don't try waking ksoftirqd before it has been spawned
      docs: Correctly spell Stephen Hemminger's name
      rcu: Add explicit barrier() to __rcu_read_unlock()
      rcu: Provide polling interfaces for Tree RCU grace periods
      torture: Abstract jitter.sh start/stop into scripts
      torture: Record TORTURE_KCONFIG_GDB_ARG in qemu-cmd
      torture: Extract kvm-test-1-run-qemu.sh from kvm-test-1-run.sh
      torture: Record jitter start/stop commands
      torture: Record kvm-test-1-run.sh and kvm-test-1-run-qemu.sh PIDs
      torture: Remove no-mpstat error message
      torture: Rename SRCU-t and SRCU-u to avoid lowercase characters
      torture: Make upper-case-only no-dot no-slash scenario names official
      torture: De-capitalize TORTURE_SUITE
      torture: Create a "batches" file for build reuse
      torture: Add kvm-again.sh to rerun a previous torture-test
      torture: Add --duration argument to kvm-again.sh
      torture: Make kvm-transform.sh update jitter commands
      torture: Make TORTURE_TRUST_MAKE available in kvm-again.sh environment
      torture: Print proper vmlinux path for kvm-again.sh runs
      torture: Consolidate qemu-cmd duration editing into kvm-transform.sh
      torture: Fix kvm.sh --datestamp regex check
      rcu: Provide polling interfaces for Tiny RCU grace periods
      rcutorture: Test start_poll_synchronize_rcu() and poll_state_synchronize_rcu()

Paul Gortmaker (8):
      lib: test_bitmap: clearly separate ERANGE from EINVAL tests.
      lib: test_bitmap: add tests to trigger ERANGE case.
      lib: test_bitmap: add more start-end:offset/len tests
      lib: bitmap: fold nbits into region struct
      lib: bitmap: move ERANGE check from set_region to check_region
      lib: bitmap: support "N" as an alias for size of bitmap
      lib: test_bitmap: add tests for "N" alias
      rcu: deprecate "all" option to rcu_nocbs=

Sangmoon Kim (1):
      rcu/tree: Add a trace event for RCU CPU stall warnings

Stephen Zhang (2):
      torture: Replace torture_init_begin string with %s
      rcutorture: Replace rcu_torture_stall string with %s

Uladzislau Rezki (Sony) (4):
      kvfree_rcu: Directly allocate page for single-argument case
      kvfree_rcu: Replace __GFP_RETRY_MAYFAIL by __GFP_NORETRY
      kvfree_rcu: Use same set of GFP flags as does single-argument
      rcuscale: Add kfree_rcu() single-argument scale test

Zhouyi Zhou (1):
      rcu: Remove spurious instrumentation_end() in rcu_nmi_enter()


 Documentation/RCU/RTFP.txt                         |   2 +-
 Documentation/admin-guide/kernel-parameters.rst    |   7 +
 Documentation/admin-guide/kernel-parameters.txt    |  16 +-
 include/linux/mm.h                                 |   4 +
 include/linux/rcu_segcblist.h                      |   7 +-
 include/linux/rculist_nulls.h                      |   2 +-
 include/linux/rcupdate.h                           |   2 +-
 include/linux/rcutiny.h                            |   7 +-
 include/linux/rcutree.h                            |   2 +
 include/linux/slab.h                               |   2 +
 include/linux/vmalloc.h                            |   2 +-
 include/trace/events/rcu.h                         |  28 +++
 kernel/rcu/rcu_segcblist.c                         |   3 +-
 kernel/rcu/rcuscale.c                              |  15 +-
 kernel/rcu/rcutorture.c                            |  93 +++++---
 kernel/rcu/tasks.h                                 |  40 +++-
 kernel/rcu/tiny.c                                  |  40 ++++
 kernel/rcu/tree.c                                  | 169 ++++++++++----
 kernel/rcu/tree_exp.h                              |   1 +
 kernel/rcu/tree_plugin.h                           | 252 ++++++++++++++-------
 kernel/rcu/tree_stall.h                            |   2 +
 kernel/softirq.c                                   |   2 +-
 kernel/torture.c                                   |   6 +-
 lib/bitmap.c                                       |  49 ++--
 lib/test_bitmap.c                                  |  46 +++-
 mm/slab.c                                          |   2 +
 mm/slab.h                                          |   2 +
 mm/slab_common.c                                   |   4 +
 mm/slob.c                                          |   2 +
 mm/slub.c                                          |   2 +
 mm/util.c                                          |   3 +
 mm/vmalloc.c                                       |   2 +
 tools/testing/selftests/rcutorture/bin/cpus2use.sh |   1 -
 tools/testing/selftests/rcutorture/bin/jitter.sh   |  20 +-
 .../selftests/rcutorture/bin/jitterstart.sh        |  37 +++
 .../testing/selftests/rcutorture/bin/jitterstop.sh |  23 ++
 .../testing/selftests/rcutorture/bin/kvm-again.sh  | 199 ++++++++++++++++
 .../selftests/rcutorture/bin/kvm-recheck.sh        |   2 +-
 .../rcutorture/bin/kvm-test-1-run-batch.sh         |  67 ++++++
 .../rcutorture/bin/kvm-test-1-run-qemu.sh          | 176 ++++++++++++++
 .../selftests/rcutorture/bin/kvm-test-1-run.sh     | 218 ++++++------------
 .../selftests/rcutorture/bin/kvm-transform.sh      |  54 ++++-
 tools/testing/selftests/rcutorture/bin/kvm.sh      |  98 ++++----
 tools/testing/selftests/rcutorture/bin/torture.sh  |   2 +-
 .../selftests/rcutorture/configs/rcu/CFLIST        |   4 +-
 .../rcutorture/configs/rcu/{SRCU-t => SRCU-T}      |   0
 .../configs/rcu/{SRCU-t.boot => SRCU-T.boot}       |   0
 .../rcutorture/configs/rcu/{SRCU-u => SRCU-U}      |   0
 .../configs/rcu/{SRCU-u.boot => SRCU-U.boot}       |   0
 .../selftests/rcutorture/configs/rcu/TREE03.boot   |   1 +
 .../selftests/rcutorture/configs/rcu/TREE04.boot   |   2 +-
 .../selftests/rcutorture/configs/rcu/TREE08.boot   |   2 +-
 .../rcutorture/configs/rcuscale/ver_functions.sh   |   2 +-
 .../rcutorture/configs/refscale/ver_functions.sh   |   2 +-
 54 files changed, 1304 insertions(+), 422 deletions(-)
 create mode 100644 tools/testing/selftests/rcutorture/bin/jitterstart.sh
 create mode 100644 tools/testing/selftests/rcutorture/bin/jitterstop.sh
 create mode 100755 tools/testing/selftests/rcutorture/bin/kvm-again.sh
 create mode 100755 tools/testing/selftests/rcutorture/bin/kvm-test-1-run-batch.sh
 create mode 100755 tools/testing/selftests/rcutorture/bin/kvm-test-1-run-qemu.sh
 rename tools/testing/selftests/rcutorture/configs/rcu/{SRCU-t => SRCU-T} (100%)
 rename tools/testing/selftests/rcutorture/configs/rcu/{SRCU-t.boot => SRCU-T.boot} (100%)
 rename tools/testing/selftests/rcutorture/configs/rcu/{SRCU-u => SRCU-U} (100%)
 rename tools/testing/selftests/rcutorture/configs/rcu/{SRCU-u.boot => SRCU-U.boot} (100%)

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