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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2010-10-15 19:22:34 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-10-21 03:09:40 -0700 |
| commit | 7b5edbc4cfe2297b0915adea5aa1eafcafadbf06 (patch) | |
| tree | e73820ca3521eb59d9e85bc6a420213bd1df0d3b | |
| parent | d827d86b6fe87b420ef3c0685ab580290ae64beb (diff) | |
| download | linux-3.10-7b5edbc4cfe2297b0915adea5aa1eafcafadbf06.tar.gz linux-3.10-7b5edbc4cfe2297b0915adea5aa1eafcafadbf06.tar.bz2 linux-3.10-7b5edbc4cfe2297b0915adea5aa1eafcafadbf06.zip | |
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>
| -rw-r--r-- | net/sched/sch_generic.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c index 3d57681bdb7..0abcc492fbf 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), }; |