Messages in this thread | | | Date | Wed, 31 Mar 2021 12:29:34 -0700 | From | "Paul E. McKenney" <> | Subject | [GIT PULL tip/core/rcu] RCU, LKMM, and KCSAN commits for v5.13 |
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Hello, Ingo!
This pull request contains changes for RCU, KCSAN, and LKMM. You can pull the entire group using branch for-mingo. Or, if you prefer, you can pull them separately, using for-mingo-rcu to pull the RCU changes, for-mingo-kcsan to pull the KCSAN changes, and for-mingo-lkmm to pull the LKMM changes.
The changes are as follows:
1. RCU updates (for-mingo-rcu):
a. Bitmap support for "N" as alias for last bit, courtesy of Paul Gortmaker. This series is used by rcu and rcutorture, and the lib/bitmap.c portions have appropriate reviews and acks. https://lore.kernel.org/lkml/20210303235526.GA21868@paulmck-ThinkPad-P72/
b. Miscellaneous fixes. https://lore.kernel.org/lkml/20210303235958.GA22373@paulmck-ThinkPad-P72/
c. kvfree_rcu updates, courtesy of Uladzislau Rezki. https://lore.kernel.org/lkml/20210304001044.GA22871@paulmck-ThinkPad-P72/
d. mm_dump_obj() updates. One of these is to mm, but is suggested by Andrew Morton. https://lore.kernel.org/linux-mm/20210304001623.GA23196@paulmck-ThinkPad-P72/
e. RCU callback offloading updates, courtesy of Frederic Weisbecker and Jiapeng Chong. https://lore.kernel.org/lkml/20210304002225.GA23492@paulmck-ThinkPad-P72/
f. Polling RCU grace-period interfaces. https://lore.kernel.org/lkml/20210304002605.GA23785@paulmck-ThinkPad-P72/
g. Realtime-related RCU updates. https://lore.kernel.org/lkml/20210304002919.GA24003@paulmck-ThinkPad-P72/
h. Tasks-RCU updates. https://lore.kernel.org/lkml/20210304003226.GA24261@paulmck-ThinkPad-P72/
i. Torture-test updates. https://lore.kernel.org/lkml/20210304003431.GA24413@paulmck-ThinkPad-P72/
j. Torture-test scripting updates. https://lore.kernel.org/lkml/20210304003750.GA24696@paulmck-ThinkPad-P72/
2. Kernel concurrency sanitizer (KCSAN) updates from Marco Elver. https://lore.kernel.org/lkml/20210304004022.GA25013@paulmck-ThinkPad-P72/
3. Linux-kernel memory model (LKMM) updates. https://lore.kernel.org/lkml/20210304004438.GA25271@paulmck-ThinkPad-P72/
All of the commits in this pull request have been subjected to subjected to the kbuild test robot and -next testing, and are available in the git repository based on v5.12-rc2 at:
git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git for-mingo
for you to fetch changes up to dd44ee94db05b80fef1469155c374caad58d8a2e:
Merge branch 'lkmm.2021.03.15a' into HEAD (2021-03-24 17:21:26 -0700)
---------------------------------------------------------------- Akira Yokosawa (2): rculist: Replace reference to atomic_ops.rst tools/memory-model: Remove 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
Marco Elver (4): kcsan, debugfs: Move debugfs file creation out of early init kcsan: Make test follow KUnit style recommendations kcsan: Switch to KUNIT_CASE_PARAM for parameterized tests kcsan: Add missing license and copyright headers
Mauro Carvalho Chehab (2): rcu: Fix kfree_rcu() docbook errors doc: Update rcu_dereference.rst reference
Neeraj Upadhyay (1): rcu: Fix CPU-offline trace in rcutree_dying_cpu
Paul E. McKenney (49): 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() tools/memory-model: Add access-marking documentation 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() Merge branches 'bitmaprange.2021.03.08a', 'fixes.2021.03.15a', 'kvfree_rcu.2021.03.08a', 'mmdumpobj.2021.03.08a', 'nocb.2021.03.15a', 'poll.2021.03.24a', 'rt.2021.03.08a', 'tasks.2021.03.08a', 'torture.2021.03.08a' and 'torturescript.2021.03.22a' into HEAD Merge branch 'kcsan.2021.03.08a' into HEAD Merge branch 'lkmm.2021.03.15a' into HEAD
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 +- Documentation/dev-tools/kcsan.rst | 3 + include/linux/kcsan-checks.h | 6 + include/linux/kcsan.h | 7 + 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/kcsan/Makefile | 4 +- kernel/kcsan/atomic.h | 5 + kernel/kcsan/core.c | 7 +- kernel/kcsan/debugfs.c | 9 +- kernel/kcsan/encoding.h | 5 + kernel/kcsan/kcsan.h | 8 +- kernel/kcsan/{kcsan-test.c => kcsan_test.c} | 118 +++-- kernel/kcsan/report.c | 5 + kernel/kcsan/selftest.c | 5 + 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/Kconfig.kcsan | 5 +- 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 + .../memory-model/Documentation/access-marking.txt | 479 +++++++++++++++++++++ tools/memory-model/Documentation/glossary.txt | 2 +- tools/memory-model/Documentation/simple.txt | 1 - 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 +- 70 files changed, 1895 insertions(+), 500 deletions(-) rename kernel/kcsan/{kcsan-test.c => kcsan_test.c} (94%) create mode 100644 tools/memory-model/Documentation/access-marking.txt 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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