Re: [PATCH net v3] gtp: serialize PDP context updates

[Pablo Neira Ayuso <pablo@netfilter.org>]

On Fri, Aug 14, 2026 at 12:31:59AM +0800, Ming Qing wrote:
> 
> > 在 2026/08/11 17:20 CST Pablo Neira Ayuso <pablo@netfilter.org> 写道:
> > This can go away too, for gtp_genl_del_pdp(), the mutex replaces this
> > incorrect rcu read size lock.
> > 
> > Thanks.
> > 
> > > +	mutex_unlock(&gtp_pdp_lock);
> > >  	return err;
> > >  }
> > >  
> > > -- 
> > > 2.53.0
> > >
> 
> gtp_find_pdp() calls gtp_find_dev(), which uses 
> dev_get_by_index_rcu(). Should I keep a narrow RCU read-side section 
> around gtp_find_pdp(), while using the mutex to protect the PDP context?

Indeed, I forgot about gtp_dev uses rcu. Thanks for explaining.