On Thu, May 30, 2024 at 03:45:41PM +0200, Frederic Weisbecker wrote:
> Last LPC's debates seem to have raised general agreement that nohz_full
> cpusets interface should operate on offline CPUs to simplify the picture.
> And since the only known future user of NOCB (de-)offloading is going
> to be nohz_full cpusets, its transitions need to operate on offline
> CPUs as well.
>
> The good news is that it simplifies a bit the (de-)offloading code, as
> the diffstat testifies.
Good stuf!!!
For the series:
Reviewed-by: Paul E. McKenney <paulmck@kernel.org>
> Thanks.
>
> Frederic Weisbecker (11):
> rcu/nocb: Introduce RCU_NOCB_LOCKDEP_WARN()
> rcu/nocb: Move nocb field at the end of state struct
> rcu/nocb: Assert no callbacks while nocb kthread allocation fails
> rcu/nocb: Introduce nocb mutex
> rcu/nocb: (De-)offload callbacks on offline CPUs only
> rcu/nocb: Remove halfway (de-)offloading handling from bypass
> rcu/nocb: Remove halfway (de-)offloading handling from rcu_core()'s QS
> reporting
> rcu/nocb: Remove halfway (de-)offloading handling from rcu_core
> rcu/nocb: Remove SEGCBLIST_RCU_CORE
> rcu/nocb: Remove SEGCBLIST_KTHREAD_CB
> rcu/nocb: Simplify (de-)offloading state machine
>
> include/linux/rcu_segcblist.h | 6 +-
> include/linux/rcupdate.h | 7 +
> kernel/rcu/rcu_segcblist.c | 11 --
> kernel/rcu/rcu_segcblist.h | 11 +-
> kernel/rcu/tree.c | 45 +-----
> kernel/rcu/tree.h | 6 +-
> kernel/rcu/tree_nocb.h | 266 +++++++++++++---------------------
> kernel/rcu/tree_plugin.h | 5 +-
> 8 files changed, 122 insertions(+), 235 deletions(-)
>
> --
> 2.45.1
>