On Wed, Sep 02, 2015 at 03:48:57PM -0700, Eric Dumazet wrote:
> On Wed, 2015-09-02 at 14:52 -0700, Martin KaFai Lau wrote:
> > On Wed, Sep 02, 2015 at 02:30:45PM -0700, Eric Dumazet wrote:
> > > Object cannot be freed until all cpus have exited their RCU sections.
> > You meant the dst_destroy() here will wait for all cpus exited their RCU
> > sections?
> >
> > static inline void dst_free(struct dst_entry *dst)
> > {
> > if (dst->obsolete > 0)
> > return;
> > if (!atomic_read(&dst->__refcnt)) {
> > dst = dst_destroy(dst);
> > if (!dst)
> > return;
> > }
> > __dst_free(dst);
> > }
>
> dst_free() is called after RCU grace period, in the case you are
> interested in.
>
> Look at dst_rcu_free() and rt_free()
Yes for IPv4 FIB
Not for IPv6 FIB. F.e. rt6_release()
The IPv6 FIB is protected by rwlock now.
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