Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > linux.kernel > #1695153
| From | "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH tip/core/rcu 09/12] rcu: Advance callbacks after migration |
| Date | 2017-07-25 00:00 +0200 |
| Message-ID | <u6Typ-2jq-1@gated-at.bofh.it> (permalink) |
| References | <u6Typ-2jq-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
When migrating callbacks from a newly offlined CPU, we are already holding the root rcu_node structure's lock, so it costs almost nothing to advance and accelerate the newly migrated callbacks. This patch therefore makes this advancing and acceleration happen. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> --- kernel/rcu/tree.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 58ab489eca66..f9f01aeb5add 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -3935,6 +3935,7 @@ static void rcu_migrate_callbacks(int cpu, struct rcu_state *rsp) rcu_advance_cbs(rsp, rnp_root, rdp); /* Leverage recent GPs. */ rcu_send_cbs_to_orphanage(cpu, rsp, rnp, rdp); rcu_adopt_orphan_cbs(rsp, flags); + rcu_advance_cbs(rsp, rnp_root, my_rdp); /* Assign GP to pending CBs. */ raw_spin_unlock_irqrestore_rcu_node(rnp_root, flags); WARN_ONCE(rcu_segcblist_n_cbs(&rdp->cblist) != 0 || !rcu_segcblist_empty(&rdp->cblist), -- 2.5.2
Back to linux.kernel | Previous | Next | Find similar | Unroll thread
[PATCH tip/core/rcu 09/12] rcu: Advance callbacks after migration "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-07-25 00:00 +0200
csiph-web