From: "Paul E. McKenney" paulmck@kernel.org
The torture.sh --do-rt command-line parameter is intended to mimic -rt kernels. Now that CONFIG_PREEMPT_RT is upstream, this commit makes this mimicking more precise.
Note that testing of RCU priority boosting is disabled in favor of forward-progress testing of RCU callbacks. If it turns out to be possible to make kernels built with CONFIG_PREEMPT_RT=y to tolerate testing of both, both will be enabled.
[ paulmck: Apply Sebastian Siewior feedback. ]
Signed-off-by: Paul E. McKenney paulmck@kernel.org Cc: Sebastian Andrzej Siewior bigeasy@linutronix.de Signed-off-by: Joel Fernandes joelagnelf@nvidia.com --- tools/testing/selftests/rcutorture/bin/torture.sh | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-)
diff --git a/tools/testing/selftests/rcutorture/bin/torture.sh b/tools/testing/selftests/rcutorture/bin/torture.sh index 0447c4a00cc4..d53ee1e0ffc7 100755 --- a/tools/testing/selftests/rcutorture/bin/torture.sh +++ b/tools/testing/selftests/rcutorture/bin/torture.sh @@ -448,13 +448,17 @@ fi
if test "$do_rt" = "yes" then - # With all post-boot grace periods forced to normal. - torture_bootargs="rcupdate.rcu_cpu_stall_suppress_at_boot=1 torture.disable_onoff_at_boot rcupdate.rcu_task_stall_timeout=30000 rcupdate.rcu_normal=1" - torture_set "rcurttorture" tools/testing/selftests/rcutorture/bin/kvm.sh --allcpus --duration "$duration_rcutorture" --configs "TREE03" --trust-make + # In both runs, disable testing of RCU priority boosting because + # -rt doesn't like its interaction with testing of callback + # flooding. + + # With all post-boot grace periods forced to normal (default for PREEMPT_RT). + torture_bootargs="rcupdate.rcu_cpu_stall_suppress_at_boot=1 torture.disable_onoff_at_boot rcupdate.rcu_task_stall_timeout=30000 rcutorture.test_boost=0 rcutorture.preempt_duration=0" + torture_set "rcurttorture" tools/testing/selftests/rcutorture/bin/kvm.sh --allcpus --duration "$duration_rcutorture" --configs "TREE03" --kconfig "CONFIG_PREEMPT_RT=y CONFIG_EXPERT=y CONFIG_HZ_PERIODIC=n CONFIG_NO_HZ_IDLE=y" --trust-make
# With all post-boot grace periods forced to expedited. - torture_bootargs="rcupdate.rcu_cpu_stall_suppress_at_boot=1 torture.disable_onoff_at_boot rcupdate.rcu_task_stall_timeout=30000 rcupdate.rcu_expedited=1" - torture_set "rcurttorture-exp" tools/testing/selftests/rcutorture/bin/kvm.sh --allcpus --duration "$duration_rcutorture" --configs "TREE03" --trust-make + torture_bootargs="rcupdate.rcu_cpu_stall_suppress_at_boot=1 torture.disable_onoff_at_boot rcupdate.rcu_task_stall_timeout=30000 rcutorture.test_boost=0 rcupdate.rcu_normal_after_boot=0 rcupdate.rcu_expedited=1 rcutorture.preempt_duration=0" + torture_set "rcurttorture-exp" tools/testing/selftests/rcutorture/bin/kvm.sh --allcpus --duration "$duration_rcutorture" --configs "TREE03" --kconfig "CONFIG_PREEMPT_RT=y CONFIG_EXPERT=y CONFIG_HZ_PERIODIC=n CONFIG_NO_HZ_FULL=y" --trust-make fi
if test "$do_srcu_lockdep" = "yes"