On Mon, Jun 20, 2016 at 07:51:22AM +0900, SeongJae Park wrote:
> CONFIG_RCU_TORTURE_TEST_RUNNABLE has removed by commit 4e9a073f60367
> ("torture: Remove CONFIG_RCU_TORTURE_TEST_RUNNABLE, simplify code")
> entirely but the document has not updated. This commit updates the
> document to remove the description for the config option and adding a
> description for the alternative module parameter.
>
> Signed-off-by: SeongJae Park <sj38.park@xxxxxxxxx>
Good catch on CONFIG_RCU_TORTURE_TEST_RUNNABLE, queued for testing and
review.
I had to drop the other hunk for torture_runnable, though. This
capability is instead controlled by several parameters that are documented
in Documentation/kernel-parameters.txt.
Thanx, Paul
> ---
> Documentation/RCU/torture.txt | 20 +++++---------------
> 1 file changed, 5 insertions(+), 15 deletions(-)
>
> diff --git a/Documentation/RCU/torture.txt b/Documentation/RCU/torture.txt
> index 118e7c1..4bd9d86 100644
> --- a/Documentation/RCU/torture.txt
> +++ b/Documentation/RCU/torture.txt
> @@ -10,21 +10,6 @@ status messages via printk(), which can be examined via the dmesg
> command (perhaps grepping for "torture"). The test is started
> when the module is loaded, and stops when the module is unloaded.
>
> -CONFIG_RCU_TORTURE_TEST_RUNNABLE
> -
> -It is also possible to specify CONFIG_RCU_TORTURE_TEST=y, which will
> -result in the tests being loaded into the base kernel. In this case,
> -the CONFIG_RCU_TORTURE_TEST_RUNNABLE config option is used to specify
> -whether the RCU torture tests are to be started immediately during
> -boot or whether the /proc/sys/kernel/rcutorture_runnable file is used
> -to enable them. This /proc file can be used to repeatedly pause and
> -restart the tests, regardless of the initial state specified by the
> -CONFIG_RCU_TORTURE_TEST_RUNNABLE config option.
> -
> -You will normally -not- want to start the RCU torture tests during boot
> -(and thus the default is CONFIG_RCU_TORTURE_TEST_RUNNABLE=n), but doing
> -this can sometimes be useful in finding boot-time bugs.
> -
>
> MODULE PARAMETERS
>
> @@ -164,6 +149,11 @@ test_no_idle_hz Whether or not to test the ability of RCU to operate in
> idle CPUs. Boolean parameter, "1" to test, "0" otherwise.
> Defaults to omitting this test.
>
> +torture_runnable Start rcutorture at boot time in the case where the
> + module is built into the kernel, otherwise wait for
> + torture_runnable to be set via sysfs before starting.
> + By default it will begin once the module is loaded.
> +
> torture_type The type of RCU to test, with string values as follows:
>
> "rcu": rcu_read_lock(), rcu_read_unlock() and call_rcu(),
> --
> 1.9.1
>
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