Hi Linus,
Please pull these RCU fixes into v7.0. The issue is that some
pre-defined scenarios in RCU torture tests have not adjusted the recent
PREEMPT_LAZY kconfig changes. I could have found it if I ran rcutorture
against linux-next, will do that next time. Thankfully Paul found and
fixed it quickly ;-)
The following changes since commit 11439c4635edd669ae435eec308f4ab8a0804808:
Linux 7.0-rc2 (2026-03-01 15:39:31 -0800)
are available in the Git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/rcu/linux.git
tags/rcu-fixes.v7.0-20260307a
for you to fetch changes up to 78c2ce0fd6ddb6c87aaa56b0d49c70e17df21e6d:
scftorture: Update due to x86 not supporting none/voluntary preemption
(2026-03-05 13:11:10 -0800)
----------------------------------------------------------------
RCU fixes for v7.0
Fix a regression in RCU torture test pre-defined scenarios caused by
commit 7dadeaa6e851 ("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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Regards,
Boqun
----------------------------------------------------------------
Paul E. McKenney (4):
rcutorture: Update due to x86 not supporting none/voluntary preemption
rcuscale: Update due to x86 not supporting none/voluntary preemption
refscale: Update due to x86 not supporting none/voluntary preemption
scftorture: Update due to x86 not supporting none/voluntary preemption
tools/testing/selftests/rcutorture/configs/rcu/SRCU-N | 4 +++-
tools/testing/selftests/rcutorture/configs/rcu/SRCU-T | 3 ++-
tools/testing/selftests/rcutorture/configs/rcu/SRCU-U | 4 ++--
tools/testing/selftests/rcutorture/configs/rcu/TASKS02 | 3 ++-
tools/testing/selftests/rcutorture/configs/rcu/TINY01 | 4 ++--
tools/testing/selftests/rcutorture/configs/rcu/TINY02 | 3 ++-
tools/testing/selftests/rcutorture/configs/rcu/TRACE01 | 3 ++-
tools/testing/selftests/rcutorture/configs/rcu/TREE04 | 4 +++-
tools/testing/selftests/rcutorture/configs/rcu/TREE05 | 4 +++-
tools/testing/selftests/rcutorture/configs/rcu/TREE06 | 5 ++++-
tools/testing/selftests/rcutorture/configs/rcu/TREE10 | 1 +
tools/testing/selftests/rcutorture/configs/rcu/TRIVIAL | 4 +++-
tools/testing/selftests/rcutorture/configs/rcuscale/TINY | 3 ++-
tools/testing/selftests/rcutorture/configs/rcuscale/TRACE01 | 3 ++-
tools/testing/selftests/rcutorture/configs/refscale/NOPREEMPT | 3 ++-
tools/testing/selftests/rcutorture/configs/refscale/TINY | 3 ++-
tools/testing/selftests/rcutorture/configs/scf/NOPREEMPT | 3 ++-
17 files changed, 39 insertions(+), 18 deletions(-)
