Hello,
On Wed, 20 May 2015, Ying Xue wrote:
Yes, this way is absolutely safe for us! But, for example, if we check
refcnt==0
in write_lock protection, the checking is a bit late. Instead, if the checking
is advanced to ip_finish_output2(), we can _early_ find the fact that we
On Wed, 2015-05-20 at 09:25 +0800, Ying Xue wrote:
Calling __ipv4_neigh_lookup_noref() inside rcu_read_lock_bh() can
guarantee that its searched neighbour entry is not freed before RCU
grace period, but it cannot ensure that its obtained neighbour will
be freed shortly. Exactly saying, it
