| Message ID | 4AEE735A.4020601@gmail.com |
|---|---|
| State | Accepted, archived |
| Delegated to: | David Miller |
| Headers | show |
From: Eric Dumazet <eric.dumazet@gmail.com> Date: Mon, 02 Nov 2009 06:51:22 +0100 > > Note : this patch depends on dev_get_by_name_rcu(), not yet comitted. Yep, I just tossed that one ine. > [PATCH net-next-2.6] pppoe: RCU locking in get_item_by_addr() > > Use dev_get_by_name_rcu() instead of dev_get_by_name(), > to avoid touching device refcount in hotpath. > > Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> And now this one too, applied, thanks! -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/net/pppoe.c b/drivers/net/pppoe.c index 2559991..60c8d23 100644 --- a/drivers/net/pppoe.c +++ b/drivers/net/pppoe.c @@ -250,20 +250,19 @@ static inline struct pppox_sock *get_item_by_addr(struct net *net, { struct net_device *dev; struct pppoe_net *pn; - struct pppox_sock *pppox_sock; + struct pppox_sock *pppox_sock = NULL; int ifindex; - dev = dev_get_by_name(net, sp->sa_addr.pppoe.dev); - if (!dev) - return NULL; - - ifindex = dev->ifindex; - pn = net_generic(net, pppoe_net_id); - pppox_sock = get_item(pn, sp->sa_addr.pppoe.sid, + rcu_read_lock(); + dev = dev_get_by_name_rcu(net, sp->sa_addr.pppoe.dev); + if (dev) { + ifindex = dev->ifindex; + pn = net_generic(net, pppoe_net_id); + pppox_sock = get_item(pn, sp->sa_addr.pppoe.sid, sp->sa_addr.pppoe.remote, ifindex); - dev_put(dev); - + } + rcu_read_unlock(); return pppox_sock; }
Note : this patch depends on dev_get_by_name_rcu(), not yet comitted. Thanks [PATCH net-next-2.6] pppoe: RCU locking in get_item_by_addr() Use dev_get_by_name_rcu() instead of dev_get_by_name(), to avoid touching device refcount in hotpath. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> --- drivers/net/pppoe.c | 19 +++++++++---------- 1 files changed, 9 insertions(+), 10 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html