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2db4df0c09
This pull request contains the following branches:
rcu-exp.23.07.2025
- Protect against early RCU exp quiescent state reporting during exp
grace period initialization.
- Remove superfluous barrier in task unblock path.
- Remove the CPU online quiescent state report optimization, which is
error prone for certain scenarios.
- Add warning for unexpected pending requested expedited quiescent
state on dying CPU.
rcu.22.07.2025
- Robustify rcu_is_cpu_rrupt_from_idle() by using more accurate
indicators of the actual context tracking state of a CPU.
- Handle ->defer_qs_iw_pending field data race.
- Enable rcu_normal_wake_from_gp by default on systems with <= 16 CPUs.
- Fix lockup in rcu_read_unlock() due to recursive irq_exit() calls.
- Refactor expedited handling condition in rcu_read_unlock_special().
- Documentation updates for hotplug and GP init scan ordering,
separation of rcu_state and rnp's gp_seq states, quiescent state
reporting for offline CPUs.
torture-scripts.16.07.2025
- Cleanup and improve scripts : remove superfluous warnings for disabled
tests; better handling of kvm.sh --kconfig arg; suppress some confusing
diagnostics; tolerate bad kvm.sh args; add new diagnostic for build
output; fail allmodconfig testing on warnings.
- Include RCU_TORTURE_TEST_CHK_RDR_STATE config for KCSAN kernels.
- Disable default RCU-tasks and clocksource-wdog testing on arm64.
- Add EXPERT Kconfig option for arm64 KCSAN runs.
- Remove SRCU-lite testing.
rcutorture.16.07.2025
- Start torture writer threads creation after reader threads to handle
race in SRCU-P scenario.
- Add SRCU down_read()/up_read() test.
- Add diagnostics for delayed SRCU up_read(), unmatched up_read(), print
number of up/down readers and the number of such readers which
migrated to other CPU.
- Ignore certain unsupported configurations for trivial RCU test.
- Fix splats in RT kernels due to inaccurate checks for BH-disabled
context.
- Enable checks and logs to capture intentionally exercised unexpected
scenarios (too short readers) for BUSTED test.
- Remove SRCU-lite testing.
srcu.19.07.2025
- Expedite SRCU-fast grace periods.
- Remove SRCU-lite implementation.
- Add guards for SRCU-fast readers.
rcu.nocb.18.07.2025
- Dump NOCB group leader state on stall detection.
- Robustify nocb_cb_kthread pointer accesses.
- Fix delayed execution of hurry callbacks when LAZY_RCU is enabled.
refscale.07.07.2025
- Fix multiplication overflow in "loops" and "nreaders" calculations.
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Merge tag 'rcu.release.v6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/rcu/linux
Pull RCU updates from Neeraj Upadhyay:
"Expedited grace period updates:
- Protect against early RCU exp quiescent state reporting during exp
grace period initialization
- Remove superfluous barrier in task unblock path
- Remove the CPU online quiescent state report optimization, which is
error prone for certain scenarios
- Add warning for unexpected pending requested expedited quiescent
state on dying CPU
Core:
- Robustify rcu_is_cpu_rrupt_from_idle() by using more accurate
indicators of the actual context tracking state of a CPU
- Handle ->defer_qs_iw_pending field data race
- Enable rcu_normal_wake_from_gp by default on systems with <= 16
CPUs
- Fix lockup in rcu_read_unlock() due to recursive irq_exit() calls
- Refactor expedited handling condition in rcu_read_unlock_special()
- Documentation updates for hotplug and GP init scan ordering,
separation of rcu_state and rnp's gp_seq states, quiescent state
reporting for offline CPUs
torture-scripts:
- Cleanup and improve scripts : remove superfluous warnings for
disabled tests; better handling of kvm.sh --kconfig arg; suppress
some confusing diagnostics; tolerate bad kvm.sh args; add new
diagnostic for build output; fail allmodconfig testing on warnings
- Include RCU_TORTURE_TEST_CHK_RDR_STATE config for KCSAN kernels
- Disable default RCU-tasks and clocksource-wdog testing on arm64
- Add EXPERT Kconfig option for arm64 KCSAN runs
- Remove SRCU-lite testing
rcutorture:
- Start torture writer threads creation after reader threads to
handle race in SRCU-P scenario
- Add SRCU down_read()/up_read() test
- Add diagnostics for delayed SRCU up_read(), unmatched up_read(),
print number of up/down readers and the number of such readers
which migrated to other CPU
- Ignore certain unsupported configurations for trivial RCU test
- Fix splats in RT kernels due to inaccurate checks for BH-disabled
context
- Enable checks and logs to capture intentionally exercised
unexpected scenarios (too short readers) for BUSTED test
- Remove SRCU-lite testing
srcu:
- Expedite SRCU-fast grace periods
- Remove SRCU-lite implementation
- Add guards for SRCU-fast readers
rcu nocb:
- Dump NOCB group leader state on stall detection
- Robustify nocb_cb_kthread pointer accesses
- Fix delayed execution of hurry callbacks when LAZY_RCU is enabled
refscale:
- Fix multiplication overflow in "loops" and "nreaders" calculations"
* tag 'rcu.release.v6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/rcu/linux: (49 commits)
rcu: Document concurrent quiescent state reporting for offline CPUs
rcu: Document separation of rcu_state and rnp's gp_seq
rcu: Document GP init vs hotplug-scan ordering requirements
srcu: Add guards for SRCU-fast readers
rcu: Fix delayed execution of hurry callbacks
rcu: Refactor expedited handling check in rcu_read_unlock_special()
checkpatch: Remove SRCU-lite deprecation
srcu: Remove SRCU-lite implementation
srcu: Expedite SRCU-fast grace periods
rcutorture: Remove support for SRCU-lite
rcutorture: Remove SRCU-lite scenarios
torture: Remove support for SRCU-lite
torture: Make torture.sh --allmodconfig testing fail on warnings
torture: Add "ERROR" diagnostic for testing kernel-build output
torture: Make torture.sh tolerate runs having bad kvm.sh arguments
torture: Add textid.txt file to --do-allmodconfig and --do-rcu-rust runs
torture: Extract testid.txt generation to separate script
torture: Suppress "find" diagnostics from torture.sh --do-none run
torture: Provide EXPERT Kconfig option for arm64 KCSAN torture.sh runs
rcu: Fix rcu_read_unlock() deadloop due to IRQ work
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