On Mon, Sep 07, 2026 at 03:58:20PM +0800, Kunwu Chan wrote:
> From: Kunwu Chan <[email protected]>
>
> Add the --do-atomic-srcu argument to torture.sh, which runs the
> SRCU-N, SRCU-P, and SRCU-T scenarios, thus covering both Tree SRCU
> (SRCU-N and SRCU-P) and Tiny SRCU (SRCU-T), with
> rcutorture.reader_flavor=0x10 appended to the boot parameters so
> that it takes precedence over each scenario's own reader-flavor
> setting. This exercises srcu_read_lock_atomic(),
> srcu_read_unlock_atomic(), and synchronize_srcu_atomic().
>
> As with other torture.sh tests, the --do-kcsan argument runs a
> KCSAN+PROVE_LOCKING variant of this test.
>
> Signed-off-by: Kunwu Chan <[email protected]>
Queued for testing and review, thank you!
Thanx, Paul
> ---
> .../selftests/rcutorture/bin/torture.sh | 24 +++++++++++++++++++
> 1 file changed, 24 insertions(+)
>
> diff --git a/tools/testing/selftests/rcutorture/bin/torture.sh
> b/tools/testing/selftests/rcutorture/bin/torture.sh
> index f0083891ee81..8885812d866a 100755
> --- a/tools/testing/selftests/rcutorture/bin/torture.sh
> +++ b/tools/testing/selftests/rcutorture/bin/torture.sh
> @@ -68,6 +68,7 @@ do_clocksourcewd="${ifnotaarch64}"
> do_rt=yes
> do_rcutasksflavors="${ifnotaarch64}" # FIXME: Back to "yes" when SMP=n
> auto-avoided
> do_srcu_lockdep=yes
> +do_atomic_srcu=no
> do_rcu_rust=no
>
> # doyesno - Helper function for yes/no arguments
> @@ -103,6 +104,7 @@ usage () {
> echo " --do-rcu-rust / --do-no-rcu-rust / --no-rcu-rust"
> echo " --do-scftorture / --do-no-scftorture / --no-scftorture"
> echo " --do-srcu-lockdep / --do-no-srcu-lockdep /
> --no-srcu-lockdep"
> + echo " --do-atomic-srcu / --do-no-atomic-srcu / --no-atomic-srcu"
> echo " --duration [ <minutes> | <hours>h | <days>d ]"
> echo " --guest-cpu-limit N"
> echo " --kcsan-kmake-arg kernel-make-arguments"
> @@ -148,6 +150,7 @@ do
> do_kcsan=yes
> do_clocksourcewd="${ifnotaarch64}"
> do_srcu_lockdep=yes
> + do_atomic_srcu=yes
> ;;
> --do-allmodconfig|--do-no-allmodconfig|--no-allmodconfig)
> do_allmodconfig=`doyesno "$1" --do-allmodconfig`
> @@ -183,6 +186,7 @@ do
> do_kcsan=no
> do_clocksourcewd=no
> do_srcu_lockdep=no
> + do_atomic_srcu=no
> ;;
> --do-normal|--do-norm|--do-no-normal|--do-no-norm|--no-normal|--no-norm)
> do_normal=`doyesno "$1" --do-normal`
> @@ -212,6 +216,9 @@ do
> --do-srcu-lockdep|--do-no-srcu-lockdep|--no-srcu-lockdep)
> do_srcu_lockdep=`doyesno "$1" --do-srcu-lockdep`
> ;;
> + --do-atomic-srcu|--do-no-atomic-srcu|--no-atomic-srcu)
> + do_atomic_srcu=`doyesno "$1" --do-atomic-srcu`
> + ;;
> --duration)
> checkarg --duration "(minutes)" $# "$2"
> '^[0-9][0-9]*\(m\|h\|d\|\)$' '^error'
> mult=1
> @@ -497,6 +504,23 @@ then
> torture_set "rcutorture" tools/testing/selftests/rcutorture/bin/kvm.sh
> --allcpus --duration "$duration_rcutorture" --configs "$configs_rcutorture"
> --trust-make
> fi
>
> +# Test atomic SRCU across Tree SRCU (SRCU-N and SRCU-P) and Tiny SRCU
> +# (SRCU-T). The reader flavor selects srcu_read_lock_atomic() and
> +# synchronize_srcu_atomic(). Tiny SRCU requires SMP=n, which aarch64
> +# does not support.
> +if test "$do_atomic_srcu" = "yes"
> +then
> + torture_bootargs="rcutorture.reader_flavor=0x10"
> + configs_atomic_srcu="SRCU-N SRCU-P"
> + if test "$ifnotaarch64" = yes
> + then
> + configs_atomic_srcu="$configs_atomic_srcu SRCU-T"
> + fi
> + torture_set "atomic-srcu" tools/testing/selftests/rcutorture/bin/kvm.sh
> \
> + --allcpus --duration "$duration_rcutorture" \
> + --configs "$configs_atomic_srcu" --trust-make
> +fi
> +
> if test "$do_locktorture" = "yes"
> then
> torture_bootargs="torture.disable_onoff_at_boot"
> --
> 2.43.0
>
