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authorEric Dumazet <eric.dumazet@gmail.com>2010-10-15 19:22:34 +0000
committerDavid S. Miller <davem@davemloft.net>2010-10-21 03:09:40 -0700
commit7b5edbc4cfe2297b0915adea5aa1eafcafadbf06 (patch)
treee73820ca3521eb59d9e85bc6a420213bd1df0d3b /net/sched
parentd827d86b6fe87b420ef3c0685ab580290ae64beb (diff)
downloadop-kernel-dev-7b5edbc4cfe2297b0915adea5aa1eafcafadbf06.zip
op-kernel-dev-7b5edbc4cfe2297b0915adea5aa1eafcafadbf06.tar.gz
net/sched: fix missing spinlock init
Under network load, doing : tc qdisc del dev eth0 root triggers : [ 167.193087] BUG: spinlock bad magic on CPU#3, udpflood/4928 [ 167.193139] lock: c15bc324, .magic: 00000000, .owner: <none>/-1, .owner_cpu: -1 [ 167.193193] Pid: 4928, comm: udpflood Not tainted 2.6.36-rc7-11417-g215340c-dirty #323 [ 167.193245] Call Trace: [ 167.193292] [<c13abaa0>] ? printk+0x18/0x20 [ 167.193342] [<c11afb53>] spin_bug+0xa3/0xf0 [ 167.193389] [<c11afcdd>] do_raw_spin_lock+0x7d/0x160 [ 167.193440] [<c1313d4e>] ? __dev_xmit_skb+0x27e/0x2b0 [ 167.193496] [<c107382b>] ? trace_hardirqs_on+0xb/0x10 [ 167.193545] [<c13ae99a>] _raw_spin_lock+0x3a/0x40 [ 167.193593] [<c1313d4e>] ? __dev_xmit_skb+0x27e/0x2b0 [ 167.193641] [<c1313d4e>] __dev_xmit_skb+0x27e/0x2b0 commit 79640a4ca695 (add additional lock to qdisc to increase throughput) forgot to initialize noop_qdisc and noqueue_qdisc busylock Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched')
-rw-r--r--net/sched/sch_generic.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c
index 3d57681..0abcc49 100644
--- a/net/sched/sch_generic.c
+++ b/net/sched/sch_generic.c
@@ -383,6 +383,7 @@ struct Qdisc noop_qdisc = {
.list = LIST_HEAD_INIT(noop_qdisc.list),
.q.lock = __SPIN_LOCK_UNLOCKED(noop_qdisc.q.lock),
.dev_queue = &noop_netdev_queue,
+ .busylock = __SPIN_LOCK_UNLOCKED(noop_qdisc.busylock),
};
EXPORT_SYMBOL(noop_qdisc);
@@ -409,6 +410,7 @@ static struct Qdisc noqueue_qdisc = {
.list = LIST_HEAD_INIT(noqueue_qdisc.list),
.q.lock = __SPIN_LOCK_UNLOCKED(noqueue_qdisc.q.lock),
.dev_queue = &noqueue_netdev_queue,
+ .busylock = __SPIN_LOCK_UNLOCKED(noqueue_qdisc.busylock),
};
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