On Tue, Nov 28, 2023 at 09:00:29AM +0100, Uladzislau Rezki (Sony) wrote: > This commit adds rcutree.rcu_normal_wake_from_gp description > to the kernel-parameters.txt file. > > Signed-off-by: Uladzislau Rezki (Sony) <urezki@xxxxxxxxx> Very good, but could you please fold this into the first patch, which is the one that adds this kernel parameter? Thanx, Paul > --- > Documentation/admin-guide/kernel-parameters.txt | 14 ++++++++++++++ > 1 file changed, 14 insertions(+) > > diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt > index 0a1731a0f0ef..65bfbfb09522 100644 > --- a/Documentation/admin-guide/kernel-parameters.txt > +++ b/Documentation/admin-guide/kernel-parameters.txt > @@ -4944,6 +4944,20 @@ > this kernel boot parameter, forcibly setting it > to zero. > > + rcutree.rcu_normal_wake_from_gp= [KNL] > + Reduces a latency of synchronize_rcu() call. This approach > + maintains its own track of synchronize_rcu() callers, so it > + does not interact with regular callbacks because it does not > + use a call_rcu[_hurry]() path. Please note, this is for a > + normal grace period. > + > + How to enable it: > + > + echo 1 > /sys/module/rcutree/parameters/rcu_normal_wake_from_gp > + or pass a boot parameter "rcutree.rcu_normal_wake_from_gp=1" > + > + Default is 0. > + > rcuscale.gp_async= [KNL] > Measure performance of asynchronous > grace-period primitives such as call_rcu(). > -- > 2.39.2 >
