On Fri, Apr 02, 2021 at 01:47:02AM +0200, Frederic Weisbecker wrote:
> When an ssp has already started a grace period and queued an early work
> to flush after SRCU workqueues are created, we expect the ssp to be
> properly initialized already. So we can skip this step at this stage.
>
> Signed-off-by: Frederic Weisbecker <frede...@kernel.org>
> Cc: Boqun Feng <boqun.f...@gmail.com>
> Cc: Lai Jiangshan <jiangshan...@gmail.com>
> Cc: Neeraj Upadhyay <neer...@codeaurora.org>
> Cc: Josh Triplett <j...@joshtriplett.org>
> Cc: Joel Fernandes <j...@joelfernandes.org>
> Cc: Uladzislau Rezki <ure...@gmail.com>
> ---
> kernel/rcu/srcutree.c | 1 -
> 1 file changed, 1 deletion(-)
>
> diff --git a/kernel/rcu/srcutree.c b/kernel/rcu/srcutree.c
> index 036ff5499ad5..7197156418e4 100644
> --- a/kernel/rcu/srcutree.c
> +++ b/kernel/rcu/srcutree.c
> @@ -1396,7 +1396,6 @@ void __init srcu_init(void)
> while (!list_empty(&srcu_boot_list)) {
> ssp = list_first_entry(&srcu_boot_list, struct srcu_struct,
> work.work.entry);
> - check_init_srcu_struct(ssp);
You lost me on this one. What happens if the only pre-initialization
invocation on the statically allocated srcu_struct pointed to by ssp
was call_srcu()? I am not seeing how the initialization has already
happened in that case.
What am I missing here?
Thanx, Paul
> list_del_init(&ssp->work.work.entry);
> queue_work(rcu_gp_wq, &ssp->work.work);
> }
> --
> 2.25.1
>
