kvfree_rcu: Add a bulk-list check when a scheduler is run
authorUladzislau Rezki (Sony) <urezki@gmail.com>
Thu, 15 Apr 2021 17:19:58 +0000 (19:19 +0200)
committerPaul E. McKenney <paulmck@kernel.org>
Mon, 10 May 2021 23:00:48 +0000 (16:00 -0700)
commitd434c00fa3ac476ca6295b8310d097dd71984624
tree0d341051c871285303b009cc26d747c7550cf99e
parentac7625ebd5f7bad93f821b7397fe50635f58aa4b
kvfree_rcu: Add a bulk-list check when a scheduler is run

The rcu_scheduler_active flag is set to RCU_SCHEDULER_RUNNING once the
scheduler is up and running.  That signal is used in order to check
and queue a "monitor work" to reclaim freed objects (if there are any)
during early boot.  This flag is used by kvfree_rcu() to determine when
work can safely be queued, at which point memory passed to earlier
invocations of kvfree_rcu() can be processed.

However, only "krcp->head" is checked for objects that need to be
released, and there are now two more, namely, "krcp->bkvhead[0]" and
"krcp->bkvhead[1]".  Therefore, check these two additional channels.

Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
kernel/rcu/tree.c