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| author | Paul E. McKenney <paulmck@kernel.org> | 2020-09-23 17:39:46 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2021-01-06 16:24:59 -0800 |
| commit | 2c4319bd1d14d01f5b6654a90c2b6362f3a407d8 (patch) | |
| tree | a9bb863e910f165850b419538f39862efd61aa24 /Documentation/admin-guide/kernel-parameters.txt | |
| parent | dcd42591ebb8a25895b551a5297ea9c24414ba54 (diff) | |
| download | lwn-2c4319bd1d14d01f5b6654a90c2b6362f3a407d8.tar.gz lwn-2c4319bd1d14d01f5b6654a90c2b6362f3a407d8.zip | |
rcutorture: Test runtime toggling of CPUs' callback offloading
Frederic Weisbecker is adding the ability to change the rcu_nocbs state
of CPUs at runtime, that is, to offload and deoffload their RCU callback
processing without the need to reboot. As the old saying goes, "if it
ain't tested, it don't work", so this commit therefore adds prototype
rcutorture testing for this capability.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Cc: Frederic Weisbecker <frederic@kernel.org>
Diffstat (limited to 'Documentation/admin-guide/kernel-parameters.txt')
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index c722ec19cd00..9f8ac776ae41 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -4338,6 +4338,14 @@ stress RCU, they don't participate in the actual test, hence the "fake". + rcutorture.nocbs_nthreads= [KNL] + Set number of RCU callback-offload togglers. + Zero (the default) disables toggling. + + rcutorture.nocbs_toggle= [KNL] + Set the delay in milliseconds between successive + callback-offload toggling attempts. + rcutorture.nreaders= [KNL] Set number of RCU readers. The value -1 selects N-1, where N is the number of CPUs. A value |