pkt_sched: add cond_resched() to class and qdisc dump
We have seen delays of more than 50ms in class or qdisc dumps, in case
device is under high TX stress, even with the prior 4KB per skb limit.
Add cond_resched() to give a chance to higher prio tasks to get cpu.
Signed-off-by; Eric Dumazet <edumazet@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c
index 272292e..0a99d7c 100644
--- a/net/sched/sch_api.c
+++ b/net/sched/sch_api.c
@@ -1303,6 +1303,7 @@
struct gnet_dump d;
struct qdisc_size_table *stab;
+ cond_resched();
nlh = nlmsg_put(skb, portid, seq, event, sizeof(*tcm), flags);
if (!nlh)
goto out_nlmsg_trim;
@@ -1615,6 +1616,7 @@
struct gnet_dump d;
const struct Qdisc_class_ops *cl_ops = q->ops->cl_ops;
+ cond_resched();
nlh = nlmsg_put(skb, portid, seq, event, sizeof(*tcm), flags);
if (!nlh)
goto out_nlmsg_trim;