# Re: \[PATCH net v3 2/7\] net/sched: act\_gate: add RCU support for parameter update

- From: Paul Moses \<hidden\>
- Date: 2026-01-22 15:51:44 
- List: netdev
- Page: https://ratatoskr.run/netdev/2026/01/3382576
- Thread: https://ratatoskr.run/netdev/2026/01/3380021/t.md

```text
Yes, wanted to show logical flow in this iteration. 

Thanks
Paul




On Wednesday, January 21st, 2026 at 1:42 PM, Victor Nogueira [ref] wrote:

> 
> 
> On 21/01/2026 10:20, Paul Moses wrote:
> 
> > Make gact->param RCU-protected and reclaim old params via call_rcu(). This
> > follows the pattern used by other actions: act_pedit swaps params with
> > rcu_replace_pointer() and defers free via call_rcu() (commit 52cf89f78c01bf),
> > act_connmark uses rcu_replace_pointer() under tcf_lock (commit 288864effe3388),
> > and act_tunnel_key does the same under lockdep (commit 445d3749315f34).
> > 
> > Dump readers in act_ct and act_pedit already use rcu_read_lock() +
> > rcu_dereference() (commits 554e66bad84ce4 and 9d096746572616), so act_gate
> > must keep old params alive past updates as well.
> > [...]
> 
> 
> I think you could've transformed patches 2, 3, 4 into a single patch.
> Since all of them are RCU-related changes and they sometimes overwrite
> each other.
```