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RCU fixes for v7.0

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Fix a regression in RCU torture test pre-defined scenarios caused by
 commit 7dadeaa6e8 ("sched: Further restrict the preemption modes")
 which limits PREEMPT_NONE to architectures that do not support
 preemption at all and PREEMPT_VOLUNTARY to those architectures that do
 not yet have PREEMPT_LAZY support. Since major architectures (e.g. x86
 and arm64) no longer support CONFIG_PREEMPT_NONE and
 CONFIG_PREEMPT_VOLUNTARY, using them in rcutorture, rcuscale, refscale,
 and scftorture pre-defined scenarios causes config checking errors.
 Hence switch these kconfigs to PREEMPT_LAZY.
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Merge tag 'rcu-fixes.v7.0-20260307a' of git://git.kernel.org/pub/scm/linux/kernel/git/rcu/linux

Pull RCU selftest fixes from Boqun Feng:
 "Fix a regression in RCU torture test pre-defined scenarios caused by
  commit 7dadeaa6e8 ("sched: Further restrict the preemption modes")
  which limits PREEMPT_NONE to architectures that do not support
  preemption at all and PREEMPT_VOLUNTARY to those architectures that do
  not yet have PREEMPT_LAZY support.

  Since major architectures (e.g. x86 and arm64) no longer support
  CONFIG_PREEMPT_NONE and CONFIG_PREEMPT_VOLUNTARY, using them in
  rcutorture, rcuscale, refscale, and scftorture pre-defined scenarios
  causes config checking errors.

  Switch these kconfigs to PREEMPT_LAZY"

* tag 'rcu-fixes.v7.0-20260307a' of git://git.kernel.org/pub/scm/linux/kernel/git/rcu/linux:
  scftorture: Update due to x86 not supporting none/voluntary preemption
  refscale: Update due to x86 not supporting none/voluntary preemption
  rcuscale: Update due to x86 not supporting none/voluntary preemption
  rcutorture: Update due to x86 not supporting none/voluntary preemption
This commit is contained in:
Linus Torvalds 2026-03-07 11:56:55 -08:00
commit 03dcad79ee
17 changed files with 39 additions and 18 deletions
Download patch file Download diff file Expand all files Collapse all files

4
tools/testing/selftests/rcutorture/configs/rcu/SRCU-N
View file

@ -2,7 +2,9 @@ CONFIG_RCU_TRACE=n
CONFIG_SMP=y
CONFIG_NR_CPUS=4
CONFIG_HOTPLUG_CPU=y
CONFIG_PREEMPT_NONE=y
CONFIG_PREEMPT_DYNAMIC=n
CONFIG_PREEMPT_LAZY=y
CONFIG_PREEMPT_NONE=n
CONFIG_PREEMPT_VOLUNTARY=n
CONFIG_PREEMPT=n
#CHECK#CONFIG_RCU_EXPERT=n

3
tools/testing/selftests/rcutorture/configs/rcu/SRCU-T
View file

@ -1,5 +1,6 @@
CONFIG_SMP=n
CONFIG_PREEMPT_NONE=y
CONFIG_PREEMPT_LAZY=y
CONFIG_PREEMPT_NONE=n
CONFIG_PREEMPT_VOLUNTARY=n
CONFIG_PREEMPT=n
CONFIG_PREEMPT_DYNAMIC=n

4
tools/testing/selftests/rcutorture/configs/rcu/SRCU-U
View file

@ -1,5 +1,6 @@
CONFIG_SMP=n
CONFIG_PREEMPT_NONE=y
CONFIG_PREEMPT_LAZY=y
CONFIG_PREEMPT_NONE=n
CONFIG_PREEMPT_VOLUNTARY=n
CONFIG_PREEMPT=n
CONFIG_PREEMPT_DYNAMIC=n
@ -7,4 +8,3 @@ CONFIG_PREEMPT_DYNAMIC=n
CONFIG_RCU_TRACE=n
CONFIG_DEBUG_LOCK_ALLOC=n
CONFIG_DEBUG_OBJECTS_RCU_HEAD=n
CONFIG_PREEMPT_COUNT=n

3
tools/testing/selftests/rcutorture/configs/rcu/TASKS02
View file

@ -1,5 +1,6 @@
CONFIG_SMP=n
CONFIG_PREEMPT_NONE=y
CONFIG_PREEMPT_LAZY=y
CONFIG_PREEMPT_NONE=n
CONFIG_PREEMPT_VOLUNTARY=n
CONFIG_PREEMPT=n
CONFIG_PREEMPT_DYNAMIC=n

4
tools/testing/selftests/rcutorture/configs/rcu/TINY01
View file

@ -1,5 +1,6 @@
CONFIG_SMP=n
CONFIG_PREEMPT_NONE=y
CONFIG_PREEMPT_LAZY=y
CONFIG_PREEMPT_NONE=n
CONFIG_PREEMPT_VOLUNTARY=n
CONFIG_PREEMPT=n
CONFIG_PREEMPT_DYNAMIC=n
@ -11,4 +12,3 @@ CONFIG_RCU_TRACE=n
#CHECK#CONFIG_RCU_STALL_COMMON=n
CONFIG_DEBUG_LOCK_ALLOC=n
CONFIG_DEBUG_OBJECTS_RCU_HEAD=n
CONFIG_PREEMPT_COUNT=n

3
tools/testing/selftests/rcutorture/configs/rcu/TINY02
View file

@ -1,5 +1,6 @@
CONFIG_SMP=n
CONFIG_PREEMPT_NONE=y
CONFIG_PREEMPT_LAZY=y
CONFIG_PREEMPT_NONE=n
CONFIG_PREEMPT_VOLUNTARY=n
CONFIG_PREEMPT=n
CONFIG_PREEMPT_DYNAMIC=n

3
tools/testing/selftests/rcutorture/configs/rcu/TRACE01
View file

@ -1,7 +1,8 @@
CONFIG_SMP=y
CONFIG_NR_CPUS=5
CONFIG_HOTPLUG_CPU=y
CONFIG_PREEMPT_NONE=y
CONFIG_PREEMPT_LAZY=y
CONFIG_PREEMPT_NONE=n
CONFIG_PREEMPT_VOLUNTARY=n
CONFIG_PREEMPT=n
CONFIG_PREEMPT_DYNAMIC=n

4
tools/testing/selftests/rcutorture/configs/rcu/TREE04
View file

@ -1,10 +1,12 @@
CONFIG_SMP=y
CONFIG_NR_CPUS=8
CONFIG_PREEMPT_LAZY=y
CONFIG_PREEMPT_NONE=n
CONFIG_PREEMPT_VOLUNTARY=y
CONFIG_PREEMPT_VOLUNTARY=n
CONFIG_PREEMPT=n
CONFIG_PREEMPT_DYNAMIC=n
#CHECK#CONFIG_TREE_RCU=y
#CHECK#CONFIG_PREEMPT_RCU=n
CONFIG_HZ_PERIODIC=n
CONFIG_NO_HZ_IDLE=n
CONFIG_NO_HZ_FULL=y

4
tools/testing/selftests/rcutorture/configs/rcu/TREE05
View file

@ -1,6 +1,8 @@
CONFIG_SMP=y
CONFIG_NR_CPUS=8
CONFIG_PREEMPT_NONE=y
CONFIG_PREEMPT_DYNAMIC=n
CONFIG_PREEMPT_LAZY=y
CONFIG_PREEMPT_NONE=n
CONFIG_PREEMPT_VOLUNTARY=n
CONFIG_PREEMPT=n
#CHECK#CONFIG_TREE_RCU=y

5
tools/testing/selftests/rcutorture/configs/rcu/TREE06
View file

@ -1,9 +1,12 @@
CONFIG_SMP=y
CONFIG_NR_CPUS=8
CONFIG_PREEMPT_NONE=y
CONFIG_PREEMPT_DYNAMIC=n
CONFIG_PREEMPT_LAZY=y
CONFIG_PREEMPT_NONE=n
CONFIG_PREEMPT_VOLUNTARY=n
CONFIG_PREEMPT=n
#CHECK#CONFIG_TREE_RCU=y
#CHECK#CONFIG_PREEMPT_RCU=n
CONFIG_HZ_PERIODIC=n
CONFIG_NO_HZ_IDLE=y
CONFIG_NO_HZ_FULL=n

1
tools/testing/selftests/rcutorture/configs/rcu/TREE10
View file

@ -6,6 +6,7 @@ CONFIG_PREEMPT_VOLUNTARY=n
CONFIG_PREEMPT=n
CONFIG_PREEMPT_DYNAMIC=n
#CHECK#CONFIG_TREE_RCU=y
CONFIG_PREEMPT_RCU=n
CONFIG_HZ_PERIODIC=n
CONFIG_NO_HZ_IDLE=y
CONFIG_NO_HZ_FULL=n

4
tools/testing/selftests/rcutorture/configs/rcu/TRIVIAL
View file

@ -1,6 +1,8 @@
CONFIG_SMP=y
CONFIG_NR_CPUS=8
CONFIG_PREEMPT_NONE=y
CONFIG_PREEMPT_DYNAMIC=n
CONFIG_PREEMPT_LAZY=y
CONFIG_PREEMPT_NONE=n
CONFIG_PREEMPT_VOLUNTARY=n
CONFIG_PREEMPT=n
CONFIG_HZ_PERIODIC=n

3
tools/testing/selftests/rcutorture/configs/rcuscale/TINY
View file

@ -1,5 +1,6 @@
CONFIG_SMP=n
CONFIG_PREEMPT_NONE=y
CONFIG_PREEMPT_LAZY=y
CONFIG_PREEMPT_NONE=n
CONFIG_PREEMPT_VOLUNTARY=n
CONFIG_PREEMPT=n
CONFIG_PREEMPT_DYNAMIC=n

3
tools/testing/selftests/rcutorture/configs/rcuscale/TRACE01
View file

@ -1,5 +1,6 @@
CONFIG_SMP=y
CONFIG_PREEMPT_NONE=y
CONFIG_PREEMPT_LAZY=y
CONFIG_PREEMPT_NONE=n
CONFIG_PREEMPT_VOLUNTARY=n
CONFIG_PREEMPT=n
CONFIG_PREEMPT_DYNAMIC=n

3
tools/testing/selftests/rcutorture/configs/refscale/NOPREEMPT
View file

@ -1,5 +1,6 @@
CONFIG_SMP=y
CONFIG_PREEMPT_NONE=y
CONFIG_PREEMPT_LAZY=y
CONFIG_PREEMPT_NONE=n
CONFIG_PREEMPT_VOLUNTARY=n
CONFIG_PREEMPT=n
CONFIG_PREEMPT_DYNAMIC=n

3
tools/testing/selftests/rcutorture/configs/refscale/TINY
View file

@ -1,5 +1,6 @@
CONFIG_SMP=n
CONFIG_PREEMPT_NONE=y
CONFIG_PREEMPT_LAZY=y
CONFIG_PREEMPT_NONE=n
CONFIG_PREEMPT_VOLUNTARY=n
CONFIG_PREEMPT=n
CONFIG_PREEMPT_DYNAMIC=n

3
tools/testing/selftests/rcutorture/configs/scf/NOPREEMPT
View file

@ -1,5 +1,6 @@
CONFIG_SMP=y
CONFIG_PREEMPT_NONE=y
CONFIG_PREEMPT_LAZY=y
CONFIG_PREEMPT_NONE=n
CONFIG_PREEMPT_VOLUNTARY=n
CONFIG_PREEMPT=n
CONFIG_PREEMPT_DYNAMIC=n